flexible solar panels for yachts

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Top 5 Best Solar Panels for Boats (2024 Marine Buyer’s Guide)

In this guide, you’ll learn:

• Why photovoltaic (PV) equipment is great to have on your boat
• Which panels are best suited for use on the water
• What qualities make for a great boat solar panel

Note:   In July 2024, SunPower notified dealers it would be halting all new shipments and project installations. The company also noted it would “no longer be supporting new Leases and PPA sales nor new project installations of these financing options.”

Why Should You Install Solar Panels On Your Boat?

Before we dive into the best panels to bring your boat into the world of clean energy, it’s worth discussing why you’d want a solar panel system on your boat in the first place.

There are a few use cases that are important to consider. These not only dictate whether or not you need panels on your boat, but they can also help you decide which system is the best and most cost-effective for you. We’ll discuss the different reasons to go solar on your boat below.

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Charging Emergency Equipment

For anyone who has run into issues out at sea, the need for reliable emergency equipment is well understood. Whether you run out of gas, your boat breaks down or you have some other issue that precludes you from getting back to shore, having a way to reach out for help will keep your mind at ease.

Depending on the type of boat you have and how well it’s equipped, you may have a radio system, a satellite phone, a regular phone or some other communication device for emergencies. All of these require power, and having a solar system on your boat ensures that you’ll always have access to these devices.

Charging Recreational Equipment

Even if you’re not running into problems at sea, you might want the ability to charge recreational equipment. It’s always nice to have the ability to charge smartphones, e-readers, speakers and other devices you might use for entertainment.

This is especially important if you plan on spending a few days at sea and don’t want to rely on your boat’s batteries. Keeping those well charged for lighting, navigation tools and starting your boat’s engine is more important than getting your phone up to a full charge.

Quality of Life at Sea

For a lot of people, there’s a lot of joy in upgrading life at sea and making things just a little more comfortable. One of the perks of installing a solar system on your vessel is that you don’t have to worry about using your boat’s batteries for non-necessities.

For example, many recreational boaters connect their solar array to an electric cooler. Others use their solar modules to power electric water heaters for hot showers and constant hot water.

The possibilities for improving your at-sea experience with solar are really up to you, which is part of what makes bringing renewable energy to your boat so exciting.

What Are the Top 5 Best Solar Panels for Boats?

If you’re convinced you want to install solar on your boat, but you don’t know much about the available options, you might be overwhelmed by the choices. You’ll have access to seemingly countless brands and models.

To help you narrow down your options and choose panels that will meet your needs, we’ve done extensive research and chosen just a few product lines that we recommend. We’ll provide a quick breakdown of the different options below, and we’ll dive deeper into the specifications in later sections.

	Best Overall	Best Value	Easiest Installation	Great Budget Option	Best Starter Kit for Backup Energy
	170 watts	100 watts	25 watts	30 watts	20 watts
	$399	$220	$42	$60	$50
	Solar panel only	Solar panel, controller and wiring	Solar panel, controller and wiring	Solar panel, controller and wiring	Solar panel, controller and wiring
	High	Above Average	Low	Average	Average
	IP67	IP67	IP65	IP67	N/A (noted to be waterproof)

SunPower 170W Solar Panel

SunPower is a leader in the residential solar industry, so it’s no surprise that we found that the company also makes the best solar panels for use on boats.

This panel is pricey, but it’s significantly more powerful than most other options. At 170 watts, you can use these panels to charge your boat’s main battery, provide backup power for emergencies, or live large on the water by powering coolers, hot water heaters and much more.

This panel doesn’t come with a solar charge controller like many other options do, so not only is it expensive, but you’ll have to lay out more money for a controller, inverter and battery. However, we believe the efficiency and power output are well worth the investment.

These panels are also rated with a waterproof rating of IP67, which means they can withstand immersion in water up to about three feet for around half an hour. If you need more protection than that, you have bigger problems on your hands than losing a panel.

• High-efficiency panel for maximum power
• High-quality, durable materials
• Trusted and reliable brand
• Waterproof up to a meter for 30 minutes
• Doesn’t include any equipment other than the panel

Renogy 100W Flexible Marine Solar Panel

The Renogy Flexible solar panel designed specifically for use on the water is our pick for the best bang for your buck. It’s about half the price of the SunPower panel, although it does have a little more than just half the power capacity.

At 100 watts, this panel is great for middle-of-the-road power. It can serve as a reliable backup source of energy, or you can use it to recharge phones, GPS devices, e-readers, laptops and other electronics. It’s possible to use it for the quality-of-life items mentioned above as well.

This panel also has an IP67 waterproof rating, which is ideal for maintaining peace of mind on the water. Although it’s less expensive than our top pick, it includes a controller and wiring to connect your panels. You’ll just need an inverter and a battery to complete your setup.

• Excellent power output
• IP67 waterproof rating
• Includes controller and wiring
• Reliable brand name
• More expensive than many other options
• Doesn’t include a battery or inverter

EcoWorthy 25W Solar Panel Kit

The EcoWorthy solar panel kit is one of the easiest photovoltaic (PV) systems to install, so it’s our top pick for those looking to get started with clean energy. You can purchase this kit with a 10 amp-hour (AH), 12-volt battery, and the MC4 connectors are plug-and-play for a quick and painless installation.

This panel has a much smaller output than our top two picks, so it’s best reserved for backup power or for charging cell phones and other small electronics.

This kit has a waterproof rating of IP65, which means it can withstand being submerged in around five feet of water for up to a half hour, and it will also be protected from sprays of water. This is a great option for maintaining peace of mind when you’re on the water, especially if conditions are rough.

Lastly, the kit includes a panel, a controller and wiring, so you’ll just need to add a battery and an inverter to complete your kit.

• IP65 waterproof rating
• Includes a controller and wiring
• Very affordable
• Significantly less power than our top picks – Only ideal for light-duty use

NewPowa 30W Solar Panel Kit

This 30 watt solar panel kit from NewPowa includes a panel, a controller and wiring. If you add a backup battery and an inverter, you can create a complete off-grid solar kit for less than $150 without leaving your home (thanks to Amazon).

With an output of 30 watts, this is the best marine solar panel for light-duty use, although you could use it for non-essential electronics like an electric cooler or a small solar water heater. Those more demanding devices should be low-use, though.

The panels and controller are IP67-rated, so they’re suitable for use on just about any boat.

Best of all, the partial solar kit is just $60, so this makes our list as our top budget pick for going solar without breaking the bank.

The kit has pre-drilled mounting holes and is compatible with a wide variety of mounting brackets. As such, your installation process should be relatively straightforward.

• Includes a controller and plug-and-play wiring
• Relatively low wattage

TopSolar Monocrystalline Solar Panel Kit

The off-grid solar kit from TopSolar is a great affordable option, and it’s what we’d recommend as a starter kit for backup energy for beginners. It only puts out 20 watts, so this is not the best option if you’re looking for something to charge your recreational devices or quality-of-life equipment. However, it’s an affordable and easy-to-install kit for emergency power.

Unfortunately, this kit doesn’t include a specific ingress protection (IP) rating, but the manufacturer does note that the product is waterproof. Based on customer reviews, it appears that this product is safe for use on the water.

The kit includes a small PV panel, a controller and wiring, so you’ll need to buy an inverter and battery separately if you want AC power or backup power.

Best of all, the kit is super easy to install. It has pre-drilled holes and is compatible with most mounting brackets and clips.

• Great option for backup power
• Easy to install
• No official IP rating
• Low wattage

What Should Boat Owners Look for When Buying Solar Panels?

Solar panels can be a great option for marine use, but not all panels and solar kits are suitable for use around water. Additionally, the panel you choose needs to be selected based on how you want to use your solar power system.

In the sections below, we’ll include a few key things you’ll want to consider when choosing a solar module for your boat.

Energy Needs

One of the first things we recommend thinking about is how much energy you need your panels to generate. This will help guide you to what size panel and how much energy output you need.

If you’re just looking for reliable backup power for your boat’s internal 12-volt battery, or you want your panels to provide power for emergencies only, you’ll probably only need a panel of around 20 watts.

If you use your boat frequently for entertaining guests, or you spend days at a time on your boat, you might want something above 100 watts to provide backup power plus electricity for electric coolers, water heaters and more. Consider everything you’ll use your solar array for and size your system accordingly.

The chart below provides a quick breakdown of what size solar panels you need for different purposes on a boat.

Single LED light	3 watts
Phone charger	10 watts
Backup battery for boat	20 watts
Small electric fan	50 watts
Electric cooler	100 watts
High-end speaker system	100 watts
Small solar water heater	100 to 150 watts
Laptop charger	125 watts

If you plan on using your panels to replace an on-board generator, you can calculate how much electricity your boat uses and then size your system accordingly. It’s always advisable to go a little bigger than you think you need, as cloud coverage and the angle of the sunlight hitting your panels can cause fluctuations in solar power production.

If you have high energy needs, we also recommend considering a Maximum Power Point Tracker (MPPT) controller, which is more efficient than a Pulse Width Modulation (PWM) controller, which is more common.

Space Available for Installation

Just like residential solar systems are limited by available roof square footage, marine solar systems are limited by the available space for installation. This is an important consideration to make to ensure you don’t buy a panel that you won’t be able to mount or use in your vessel.

Before you buy any equipment, we recommend checking the measurements of the panel and deciding where on your boat you can install it. Some portable, foldable panels come with kickstands for temporary setups, but the smaller of our top picks can be set up just about anywhere without mounting brackets as well.

Type of Solar Panel

You’ll have a few choices for the type of panel you purchase for your boat as well.

First, you’ll need to decide between thin-film solar panels, polycrystalline solar panels and monocrystalline solar panels.

• Monocrystalline panels are the most efficient, so they’re the best suited for use on boats. The higher efficiency ratings will let you produce more energy per square foot, which is essential on a boat where space is limited. All of our recommendations above are monocrystalline.
• Polycrystalline solar panels can also work, but they won’t provide as much solar power.
• Thin-film panels are the most affordable, but they generate even less electricity and aren’t ideal for use where available space is minimal.

Second, you should think about whether you want a rigid solar panel with an aluminum frame or a semi-flexible one. Flexible panels contain special solar cells that can be a bit pricier, but they’re easier to install and are a bit more versatile. They can be mounted on curved surfaces, giving you more placement options.

Waterproof Rating

Since you’ll be using your panels on the water, it’s essential that you choose one with a good waterproof rating. Some of the best options are IP67 and IP65. These will ensure your panels and charge controllers or regulators remain safe and at low risk of fire even when exposed to moisture and direct water contact.

Accessories

Finally, you should consider what your kit comes with. Some come with only panels, so you’ll need to buy a controller, an inverter and a battery to complete your setup. Some come with a combination of these parts, although batteries and inverters aren’t commonly included. Some panels also include mounting brackets, although this is also uncommon.

Thinking about the additional equipment you’ll need to purchase after buying your panels will help you budget more effectively for your entire system.

How Do Solar Panels Work With Boats?

PV panels for boats work just like panels for residential use — they collect sunlight and route the energy either to a storage or use system.

Since boat solar systems are entirely off-grid, most require the following:

• Solar panels
• A charge controller
• An inverter
• Mounting brackets or other mounting hardware
• A backup battery for energy storage

We’ll explain what each of these components does in the section below, and then we’ll get into how to set up and maintain your system.

Equipment for a Marine Solar System

The main components you’ll absolutely need for your boat solar system are PV panels and a controller. If you plan to store energy or use it to charge common electronics, you’ll also need a battery and an inverter.

The panels are the pieces of the system that collect energy from the sun. The electricity generated is then passed to your controller, which limits the amount of power that flows through the wires to your battery or device.

The charge controller helps prevent overcharging batteries or electronics when production is high, and it also prevents battery drainage when production is low. Some panels are equipped with bypass diodes to provide the same safety features.

The solar energy that’s collected is direct current (DC), while most electronics, including standard light fixtures, use alternating current (AC) power. An inverter is used to convert DC current to AC so that you can use your solar power to power devices directly. If you don’t have DC lights in your boat, for example, an inverter might be necessary to provide lighting.

A battery storage system is exactly what it sounds like: it’s a battery bank that stores solar energy for later use.

Solar batteries are useful for two main reasons on boats.

• First, if you ever experience cloudy days, your solar production might very well drop below what you need to provide power to your devices. In that case, having a battery to pull stored energy from can be helpful in maintaining charging capability or electricity.
• Additionally, a battery on board can be useful for maintaining backup power for emergencies. If your boat’s built-in battery ever fails or you need to charge emergency communication or navigation devices, a battery will come in handy.

Installation

Since you want your solar panels to be exposed to as much sun as possible, it’s best to install them at or near the highest point on your boat — often the bimini. This will prevent them from getting shade from other parts of your boat during the day, regardless of which direction your vessel is moving.

It’s also typically best to install your panels as close to parallel with the surface of the earth as possible. Since your boat will be moving around a lot, it’s not realistic to install them facing the path of the sun in the sky as you would on a home. Laying them flat gives you the best chance of always collecting at least some sunlight.

You, of course, need to consider available space as well, so remember to take measurements of your installation site and compare them to your panels before beginning the process.

Finally, you should consider where your batteries will be — if applicable — and where your wiring will run once your installation is complete. Keeping these things in mind will help ensure that the installation process goes as smoothly as possible.

Below, we’ll include a brief step-by-step guide on how to install a solar system on your boat.

• First, take measurements of where your panels will be installed, the path the wiring will take to all components and where your battery, inverter and controller will be placed. Making sure you have enough room for all of your components will help avoid headaches once you get started.
• We recommend mounting your batteries, inverter and controller first. These are generally the easier components to mount, so they’re the easiest to move once installed.
• Next, mount your panels. The process for this will depend on the panels you choose and where you plan to install them. You should follow the installation instructions for the mounting brackets or hardware you purchase.
• Finally, you can wire your system, beginning with the connection between the panels and the controller and then the connections to the inverter and battery.
• You can test your system by using a voltmeter or by checking to see if your powered devices function as intended. Some controllers will also show you if your panels are providing energy and how much they’re producing.

For more guidance and information on how to set up your boat solar system, you can check out the video below:

Maintenance

Thankfully, solar systems are relatively maintenance-free once installed, although you should carry out routine system checks and cleaning to ensure you continue to enjoy maximum safety and energy production.

You should spray down your panels with water about once every six months to get any accumulation of dirt or salt off of them. This will help maximize energy generation. Around the same time, you should also check the wires and connectors for corrosion, which is more likely to occur if you use your boat in saltwater.

After major storms, it’s a good idea to ensure that none of the connections between components were lost. A simple disconnect could lead to your battery charging issues, which could be an issue if you ever need backup power.

Lastly, it’s worth mentioning that solar systems on boats are generally considered safe. There is a small risk of fire but provided you carry out the proper maintenance, you should avoid any serious issues.

Are Marine Solar Panels Worth It?

The answer to this question really depends on who you ask. For some boat owners, PV panels are essential. Not only can they provide backup power for emergencies, but they can also improve your quality of life at sea and the enjoyment of your boat.

For many people, these things are indispensable, so solar systems are well worth the investment. For certain types of boats — like small fishing boats and sailboats — solar panels will be the only source of electricity.

Other boat owners feel comfortable relying on generators if they have them, and some use their boats only for short durations, which makes having an on-board solar array less valuable.

For most people, though, having at least a small solar system to provide backup power for emergencies is worthwhile. From there, opting to up the size of your system to improve your time at sea isn’t hard to get behind.

FAQ: Marine Solar Panels

Below, we’ll answer a few of the most common questions we get about solar panel systems made for boats.

What are the best marine solar panels?

In our opinion, the best solar panels for boat use are the SunPower 170W solar panels. These are flexible panels that allow for easy and versatile installation.

They are some of the most efficient panels suitable for boat use, and they provide an incredible 170 watts each. This is enough power for just about anything you need electricity for on your boat and for emergency equipment in low-light conditions.

These panels are a bit expensive, and they don’t come with any additional equipment. However, the junction boxes have a waterproof rating of IP67, come with a five-year warranty for equipment and high efficiency and are made from high-quality, durable materials for years of use.

Will solar panels keep my boat battery charged?

Yes, solar panels can be hooked up to keep your boat’s 12 volt battery charged. However, you need to make sure you install a system that is sized appropriately for your boat’s needs.

You can check how much power your boat draws from its battery system by looking at the loads (in amps or watts) of each device. You can also use your battery monitor if you have one to check the energy demand of each individual component pulling power. Then, choose solar panels that produce a bit more energy than your system needs.

If you live in an area that experiences a lot of cloudy weather, you might want to size up your system even more to ensure your system generates enough electricity.

How much does it cost to put solar panels on a boat?

The cost to install a solar array on your boat can range from around $150 up to well over $1,000. Where in this range your total falls depends primarily on how much energy you need to produce.

If you’re looking for portable solar panels to take on and off a small boat with you for emergency use only — which is typical for sailboats and smaller boats that don’t normally have electricity — you’ll likely be looking at the $150 end of the spectrum.

If you have a much larger boat and want to be able to maintain power for your essential equipment and some non-essentials, then you’ll likely push your all-in cost closer to the higher end of the range.

What are the benefits of solar panels on boats?

Installing solar panels on your boat can provide quite a few key benefits, although the perks you’ll actually experience depend on your situation and your specific boat.

Perhaps most importantly, solar panels can charge your boat’s battery and maintain electricity for emergencies. Most systems — even small ones — can serve to charge your phone, GPS or other emergency devices in case you run into problems out on the water.

Larger systems can also provide power for recreational use, like charging phones, powering speaker systems, keeping beer cold and more.

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Yacht Solar: Exploring the Advantages of Flexible Solar Panels for Boats

When it comes to sailing the open waters, boat owners are constantly seeking innovative ways to enhance their boating experience while being mindful of the environment. One such breakthrough in marine technology is the utilization of flexible solar panels for boats. In this article, we will delve into the world of marine solar panels, discussing their benefits, applications, and the various options available in the market.

Sailing enthusiasts are increasingly turning to flexible solar panels as a viable solution to power their boats sustainably. These innovative panels offer significant advantages over traditional rigid solar panels, making them a popular choice among boat owners worldwide.

1. Understanding Flexible Solar Panels for Boats

1.1 what are flexible solar panels.

Flexible solar panels, also known as thin-film solar panels, are made of lightweight and flexible materials such as amorphous silicon. This flexibility allows them to conform to various curved surfaces on boats, making them an excellent choice for marine applications.

1.2 How Do Flexible Solar Panels Differ from Conventional Panels?

Unlike conventional solar panels that use rigid crystalline silicon cells, flexible solar panels use thin-film technology, which makes them more versatile. Traditional panels are bulkier and heavier, while flexible panels are lightweight and easy to install.

1.3 The Advantages of Using Flexible Solar Panels on Boats

The benefits of flexible solar panels on boats are manifold. They are lightweight, durable, and resistant to impacts, making them ideal for marine environments. Additionally, their flexibility allows them to fit on curved surfaces, maximizing the use of available space on boats.

2. Addressing Rust Concerns in Marine Solar Panels

2.1 the impact of rust on traditional solar panels.

Traditional solar panels are often mounted using metal brackets or frames. In marine environments, these metal components are susceptible to rust due to exposure to saltwater and humidity. Rust can compromise the structural integrity and efficiency of the panels.

2.2 Why Flexible Solar Panels are Rust-Resistant

Flexible solar panels do not require metal brackets for installation. As a result, they are not as vulnerable to rust as their rigid counterparts. This advantage extends the lifespan of flexible panels and ensures optimal performance even in corrosive marine conditions.

3. Empowering Boats with Solar Panels and Batteries

3.1 combining solar panels with battery systems.

Integrating solar panels with boat batteries creates an independent and sustainable energy system. Solar panels generate electricity during the day, which can be stored in batteries to power various onboard appliances and equipment, even during cloudy or nighttime conditions.

3.2 Advantages of Using Solar Panels for Boat Batteries

Using solar panels for boat batteries reduces the reliance on traditional power sources, such as generators or shore power. This not only cuts down operational costs but also reduces noise pollution and emissions, promoting eco-friendly boating practices.

4. Exploring Flex Solar Panels for Marine Applications

4.1 the versatility of flex solar panels.

Flexible solar panels can be installed on various boat surfaces, including the deck, hull, and bimini tops. Their lightweight and pliable nature allow them to adapt to the unique contours of different boat designs.

4.2 Installing Flex Solar Panels on Different Boat Surfaces

Boat owners can install flexible solar panels using adhesives or by sewing them into canvas materials. This installation flexibility offers convenience and ensures a seamless integration with the boat's aesthetics.

5. The Rise of Flexible Solar Panels in the UK

5.1 marine flexible solar panels in the uk.

The UK, with its extensive coastline and thriving boating community, has seen a surge in the adoption of flexible solar panels. Boat owners are increasingly recognizing the long-term benefits of harnessing solar power for their marine activities.

5.2 Embracing Sustainable Boating Solutions

The popularity of flexible solar panels in the UK reflects the growing awareness and commitment to sustainable boating practices. As environmental concerns mount, the marine industry is actively seeking eco-friendly solutions to minimize its carbon footprint.

6. The Convenience of Boat Solar Panel Kits in the UK

6.1 all-in-one boat solar panel kits.

Boat solar panel kits offer a convenient solution for boat owners looking to embrace solar power. These kits come with all the necessary components, including panels, mounting hardware, charge controllers, and connectors, making installation hassle-free.

6.2 Harnessing Solar Energy Effortlessly

Boat solar panel kits provide boat owners with a simple and effective way to harness solar energy. By generating electricity from the sun, boaters can extend their time on the water without worrying about depleting conventional power sources.

Read our top notch articles on topics such as sailing, sailing tips and destinations in our Magazine .

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7. Understanding the Issue of Panel Rust

7.1 common causes of panel rust.

Panel rust in traditional solar panels is primarily caused by exposure to moisture and salty air. It can lead to corrosion and decrease the efficiency of the panels over time.

7.2 Preventive Measures and Solutions

Flexible solar panels, being less prone to rust, require less maintenance. However, boat owners can further protect their panels by choosing anti-corrosive mounting options and performing regular inspections.

a8. Harnessing the Power of 12V Solar Panels for Boats

8.1 the advantages of 12v solar panels.

12V solar panels are a popular choice for boats due to their compatibility with standard marine battery systems. They are easy to install and can efficiently charge 12V batteries.

8.2 Enhancing On-Board Energy Efficiency

By installing 12V solar panels, boat owners can optimize their onboard energy consumption and reduce the reliance on engine-driven charging methods, saving both fuel and money.

9. The Best Solar Panel Kits for Boats in the UK

9.1 top picks for boat solar panel kits.

Several reputable manufacturers offer high-quality solar panel kits designed specifically for marine applications. Researching and comparing different kits can help boaters find the best fit for their needs.

9.2 Factors to Consider When Choosing Solar Panel Kits

When selecting a solar panel kit, factors such as wattage, efficiency, and durability should be taken into account to ensure a reliable and long-lasting solution.

10. Enjoying the Sun with Boat Sun Power

10.1 embracing solar energy for recreational use.

Solar power enables boaters to enjoy recreational activities without the noise and fumes associated with traditional power sources. It opens up new possibilities for leisurely and environmentally-conscious boating.

10.2 The Pleasures of Environmentally-Friendly Boating

Boat sun power offers a cleaner and greener way to explore the waters, preserving the marine ecosystem and contributing to sustainable tourism.

11. Exploring Marine Solar Panel Kits

11.1 preparing your boat with solar panel kits.

Installing marine solar panel kits requires careful planning and consideration of the boat's layout and energy needs. Consulting with experts can ensure a well-designed and effective solar power system.

11.2 Advantages of Customizable Marine Solar Panel Kits

Customizable marine solar panel kits allow boat owners to tailor the system according to their energy requirements and space limitations. This customization maximizes energy output and overall efficiency.

12. Sailing the Future: Solar Sailboats

12.1 the concept of solar sailboats.

Solar sailboats take sustainability to new heights, utilizing large solar panels to power electric propulsion systems. These futuristic vessels offer emissions-free and silent sailing.

12.2 Eco-Friendly Sailing with Solar Power

Solar sailboats pave the way for eco-friendly yachting, promoting renewable energy use and reducing the environmental impact of maritime travel.

13. Optimizing Sailboat Solar Panel Mounts

13.1 choosing the right solar panel mounts for sailboats.

Selecting the appropriate solar panel mounts is crucial for maximizing energy production. Properly positioned panels receive the maximum sunlight exposure throughout the day.

13.2 Ensuring Optimal Sunlight Exposure

By strategically installing sailboat solar panels, boat owners can capture more sunlight, ensuring a steady flow of clean energy for their sailing adventures.

14. Sailing with Solar Power: Harnessing the Sun

14.1 how solar panels enhance boat efficiency.

Solar panels offer boat owners a reliable and renewable power source, reducing the reliance on traditional fossil fuels and enhancing overall energy efficiency.

14.2 The Future of Solar-Powered Sailing

As technology advances and renewable energy becomes more accessible, the future of solar-powered sailing looks promising, with boats becoming even more eco-friendly and sustainable.

15. Finding the Best PV Panels for Boats

15.1 understanding photovoltaic panels.

Photovoltaic (PV) panels are the heart of any solar power system. Understanding their efficiency and construction is essential for selecting the best PV panels for boats.

15.2 Selecting High-Quality PV Panels for Boats

High-quality PV panels offer better performance, durability, and longevity. Investing in top-tier panels ensures a higher return on investment and a more eco-friendly boating experience.

Embracing solar technology in the form of flexible solar panels offers boat owners a clean, sustainable, and cost-effective way to power their vessels. The advantages of flexible solar panels, such as their rust-resistance, installation flexibility, and efficiency, make them an ideal choice for marine applications. As the world seeks greener alternatives, the future of boating lies in harnessing the power of the sun, enabling sailors to embark on eco-friendly adventures on their solar-powered yachts.

So what are you waiting for? Take a look at our range of charter boats and head to some of our favourite  sailing destinations.

FAQs: Flexible Solar Panels for Boats

Yes, flexible solar panels are designed to withstand the harsh marine environment. Their durability, impact resistance, and rust-resistance make them ideal for boat applications.

While flexible solar panels can power several appliances, it's essential to assess your energy needs and consider battery storage capacity for consistent power supply.

No, solar sailboats rely solely on the power generated from their solar panels to operate their electric propulsion systems, making them completely emissions-free.

Yes, the flexibility of these panels allows them to conform to various boat surfaces, including curved ones, providing multiple installation options.

I am ready to help you with booking a boat for your dream vacation. Contact me.

Denisa Nguyenová

Yachting Monthly

• Digital edition

Everything you need to know about yacht solar power

• Dennis O'Neill
• May 23, 2024

Marine solar panels are becoming more efficient and eco-friendly. Dennis O’Neill reports on the latest design advances

Keeping your batteries topped up without having to run the engine is a continuous challenge for cruising sailors, especially those who are highly conscious of their carbon footprint or just wanting to cruise ‘off grid’.

Solar panels have been a good option for sustainable sailing in sunny conditions for some time, being almost maintenance-free and, unlike wind generators, silent. However, maritime conditions are a harsh test for even the best of them due to the incessant exposure they face from saltwater spray and, ironically, ultraviolet (UV) energy.

Now, though, new solar panel technology coming over the horizon promises further improvements in both their efficiency and ease of use.

Silicon cells

Most solar panels use silicon-based photovoltaic cells, with the most efficient type within this class being monocrystalline cells, made from a single pure ingot of silicon. Polycrystalline silicon cells, made from multiple silicon crystals bonded together, perform almost as efficiently as monocrystalline cells but are less expensive to produce.

Ordinary photovoltaic cells, meanwhile, which are the most commonly used, are much cheaper, lighter, and easier to mount where structural flexibility is needed.

The downside, though, is that their intrinsic chemical materials tend to be more environmentally hazardous and difficult to recycle at their end-of-life.

The latest solar panels can even be installed on a fabric canopy. Photo: Tor Jonhson

Perovskite revolution

The new buzz of excitement in the solar panel sector is coming from the development of perovskite solar cells, which promise 50% more efficiency than conventional photovoltaic solar cells in converting sunlight into electricity. They also have the extraordinary potential of being used in a liquid form, such as paint, and even being printed onto compatible surfaces.

Researchers are now reported to be trialling spray-on perovskite solar cells that could be applied as a tint for windows. The production of perovskite solar cells is also less energy-intensive than conventional solar cells and can be achieved at room temperature using relatively abundant and cost-effective base materials.

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Rigid Solar panels

Rigid solar panels currently on the market remain the most efficient and well-suited for mounting on larger boats with flatter surfaces. However, they are heavier, more awkward to mount, and can’t be walked on, so unless you have a hard top or dedicated gantry aft, you’re better off choosing a more resilient semi-flexible option.

Rigid solar panels are covered with impact-resistant glass in a metal frame, and often require hardware to install. Over time, the hardware and frame can corrode in unforgiving marine conditions, so it’s important to choose one with added weather protection.

Solar is well suited to use in yachts. Photo: Catchlight Visual Services / Alamy Stock Photo

Flexible Solar panels

Flexible solar panels, meanwhile, have become increasingly popular with yacht owners due to their versatility and adaptability. While not yet as efficient as rigid panels, they do offer a more eco-friendly and cost-effective option as well as being thin, light, bendable, and easy to install or mounted on almost any surface. You can, for instance, attach flexible solar panels easily to soft biminis and even sails.

However, attaching them to flexing surfaces may cause physical strain on the internal cells, causing damage in the long run. They also tend to have efficiency levels below 20% (compared to just above 20% for rigid solar panels), so they require more physical space to produce similar amounts of output.

They are usually encased in plastic coverings to make them more impact-resistant, but the plastic can degrade due to salt and UV.

Thin solar cells installed on a teak deck. Photo: Graham Snook / Yachting Monthly

Semi-flexible Solar panels

These are ideal for curved boat surfaces. The plastic covering on semi-flexible panels makes them highly resistant to impact and weight, in case you accidentally step on them while moving around a swaying boat.

Kite concept

Sailing enthusiasts working at the German engineering firm FLIN, based in Kiel, have developed a new broad range of versatile marine solar panel systems.

Products within the range include: the FLINrail, a rigid solar panel that can be used while sailing by being hooked onto a boat’s guardrails; the FLINstripe, designed to be mounted along a boom’s lazy bag using Velcro strips; and the FLINkite, a thin lightweight design comprised of up to six square panels that can be hoisted on a halyard and then tilted towards the sun using simple guide lines.

FLINkite can be hoisted vertically on a halyard and tilted towards the sun using simple guide lines

One owner who cruises a 40ft Fountaine Pajot Lavezzi catamaran in European waters has found that his FLIN installations have benefitted his cruising enormously.

‘We have four FLINflex panels mounted permanently on our built-in bimini, which produces around 450 watts while we’re sailing,’ he explains. ‘Then, when we’re at anchor or in port we can also set our FLINkite, which has six panels, each of which can produce up to around 50 watts.

We have a solar controller for each of the two systems and I’m able to monitor how well the systems are generating power using an app on my smartphone. Overall, the FLIN panels cover all of our electricity requirements, including our fridge and electric windlass. We’ve even now treated ourselves to an electric kettle!’

Foldable solar panels inspired by satellites

Origami Inspiration

Another exciting and innovative concept comes from two highly experienced sailors, Kim-Joar Myklebust and Sara Plaga, based in Milan, Italy. Together, they have designed and begun producing an origami-style marine solar panel made of recycled carbon fibre.

‘The idea came out of frustration,’ explains Kim-Joar. ‘We had regular power shortages on our sailing trips, even after we’d installed a large and bulky solar system which couldn’t keep our boat’s batteries charged.

‘As a motorsport design engineer I saw how space satellites used large solar panels that folded outwards to increase the area exposed to the sun, so I started cutting and folding a piece of paper until I found a shape I felt could work as a compact, fold-out solar panel on a boat.’

The couple’s firm, Levante, tested the effectiveness of their origami panels extensively aboard a 36ft cruising yacht, finding that their new product was 20% lighter than other foldable solar panels and 40% more compact, whilst producing only half of the CO2 footprint.

‘We’re determined to revolutionise the entire concept of marine solar panels,’ adds Sara. ‘You can use our origami solar panels in many different ways – just fold them up and use them on your boat, or at home, or anywhere you like.’

It’s vital you connect your solar panel to your battery via an electronic charge controller to prevent the battery overcharging

Solar panel maintenance

Solar panel efficiency is compromised by both salt water and long-term exposure to UV and high temperatures. Industry experts advise that good regular maintenance will improve a solar panel’s performance by around 15%.

You should clean solar panels early in the morning, while they are at their coolest, as cleaning them when they are warm or exposed to direct sunlight can cause internal thermal stresses. Always use distilled or de-ionized water to avoid the formation of mineral stains or deposits on the surface of the panels, and avoid using harsh chemicals or abrasive solvents that could scratch the photovoltaic cells.

Let the panels air dry or use soft cloths, and make sure no water residue is left. You should also check regularly for cracks, breaks or loose connections.

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The 6 Best Marine Solar Panels of 2024

This post may contain affiliate links. Please read our disclosure policy .

The best marine solar panels can keep boat batteries topped off so that your bilge pumps, navigation lights, GPS systems, depth finders, and other electronics continue to run smoothly and efficiently. By combining marine solar panels with a charge controller that can regulate the sun’s energy into a deep cycle or lithium battery bank, you can create your own electrical grid for those long days spent at sea.

Or, you can use solar panels to supplement shore power when you’re docked in a marina to help cut back on costs. 

There are two main types of solar panels that can be utilized on boats: Flexible and fixed, which come in a variety of different sizes and power wattages. Depending on factors like usage and the size and type of your boat, the best marine solar panel will vary.

To come up with our list of the best marine solar panels, we looked at dozens of options from well-established solar companies. We considered their efficiency, wattage, size, customer reviews, and ratings, pricing, and even compared top picks with our own first-hand experience. Ahead, check out our recommendations. 

Our Top Picks:  

• Our Top Pick:  Renogy 100 Watt 12 Volt Monocrystalline Solar Panel – $99.99 at Amazon
• Best Flexible Marine Solar Panel : N ewpowa Flexible Solar Panel 100 Watt 12 Volt – $99.99 at Amazon
• Best Budget Marine Solar Panel : HQST 100 Watt 12 Volt 9BB Monocrystalline Solar Panel – $69.99 at Amazon
• Best Rigid Marine Solar Pane l: SUNER POWER 50 W 12 V Solar Battery Charger – $119.95 at Amazon
• Best Portable Solar Panel: DOKIO 160 Watt 18 Volt Portable Solar Panel Kit Folding Solar Charger – $159.77 at Amazon

Reviews of The Best Marine Solar Panels

1. our top pick: renogy 100 w 12 v monocrystalline solar panel.

Our top pick for the best marine solar panels comes from Renogy, perhaps one of the most well-known brands in DIY solar panel installation. Renogy’s 100-watt monocrystalline solar module is proof that a simple design can sometimes be the best. Although it doesn’t include built-in controllers, it excels at all the basics.

The panel has an impressive 22% efficiency (the typical solar panel range is between 18% and 23%) and a guaranteed positive tolerance, which means users can expect a minimum output of 100 watts. It’s also made from high-quality materials like corrosion-resistant aluminum and boasts notable industry certifications from TUV Rheinland and Intertek . That said, the waterproof rating of the junction box is not well suited for total immersion (but is protected against rain or waves), so just make sure you securely mount these panels. 

• Power Rating: 100 W
• Claimed Efficiency : 22%
• Weight: 14.1 lb
• Dimensions: 41.8″L x 20.9″W x 1.38″H
• Waterproof Ratings: IP65 (junction box), IP67 (connectors) 
• Mounting Options: Clamp using mounting holes
• Excellent build quality
• Guaranteed positive tolerance (0-4%)
• Great ratings 
• Moderate price
• Basic design
• Mounting can be difficult for inexperienced users

What Others Are Saying:

Renogy’s 100 W panel has a 4.7-star rating from more than 6,370 Amazon ratings.  Sail Magazine , EcoWatch , and Futurism all chose the Renogy 100 W panel as their best overall marine solar panel, too.

Buy the Renogy 100W 12V Monocrystalline Solar Panel:

2. Best Flexible Marine Solar Panels: Newpowa Flexible Solar Panel 100 W 12 V

This pick from Newpowa is easily one of the best flexible solar panels for boats. Weighing in at a little over four pounds — about a third of a rigid solar panel of the same size – the module uses high-quality SunPower solar cells and sturdy ETFE binding for durability. Its thin design allows it to easily be mounted on biminis or directly on curved deck surfaces, and the MWT (metal wrap through) technology eliminates bus bars on the front side, improving power output .

It’s worth noting that flexible marine panels are often slightly less efficient than rigid panels, but this 100-watt panel from Newpowa maintains a 20% efficiency – one of the highest available for flexible panels. The waterproof rating of the junction box is an impressive IP68, meaning it can be immersed in water for long periods. 

• Claimed Efficiency : 20%
• Weight: 4.19 lb
• Dimensions: 41.34” L x 21.26” W x .12” H
• Waterproof Ratings: IP68 (junction box), connectors not specified
• Mounting Options: Tie-down using grommets; caulk/paste to hull
• State-of-the-art MWT technology
• Lightweight and compact design
• Reasonably-priced
• Durable construction
• No adhesive back surface for pasting

One of the best marine solar panels for flexibility, the Newpowa 100 W panel has a 4.6-star rating from more than 1,200 Amazon shoppers.  

Buy the Newpowa Flexible Solar Panel 100 W 12 Volt:

3. Best Budget Marine Solar Panel: HQST 100 W 12 V 9BB Monocrystalline Solar Panel

This 100-watt solar panel from HQST has a ton of great features for a decently affordable price. It comes with a 9-busbar construction that helps to achieve an efficiency rate of up to 23% – the highest we’ve found. For some, the square-shaped design may be more helpful for installation, especially in compact spaces. 

The panel is also made with top-quality materials, like high-purity silicon cells and multi-layered sheet laminations. It’s rated to IP65 to protect against low-pressure water jets from any direction (like hard rain), but cannot be fully immersed in water.  

• Claimed Efficiency : 23%
• Weight: 14.82 lb
• Dimensions: 32.5″L x 26.4″W x 1.18″H
• Waterproof Rating : IP65 (junction box and connectors)
• Inexpensive
• High efficiency
• Compact, wide-body design
• Wide-body design may be difficult to mount in elongated spaces 
• Some reviews mention it didn’t achieve the advertised maximum efficiency

The HQST 100 W monocrystalline solar panel is one of the best marine solar panels: It was featured as a runner-up in Futurism’s list of best marine solar panels. It is also among Electric Rate’s picks for best marine panels. 

Buy the HQST 100 W 12 V 9BB Monocrystalline Solar Panel:

4. Best Rigid Marine Solar Panels: SUNER POWER 50 W 12 V Solar Battery Charger 

Very few rigid solar panels on the market come with an integrated MPPT charge controller and adjustable mounting bracket, especially at the price of the Suner Power 50 W panel. While the solar panel itself is a basic, monocrystalline module, the built-in controller eliminates the need for buying, mounting, and connecting another electronic device. 

Another major standout is the adjustable bracket that can allow for more direct sunshine throughout the day, improving power production. However, the cables and controller are not waterproof (only splash/light rain resistant), so you may want to add extra protection if it’s angled in a manner that can expose the controller to heavy rainfall. 

• Power Rating: 50 W
• Claimed E fficiency : 21%
• Weight: 7.7 lb
• Waterproof Rating: IP54 (Controller and cables)
• Dimensions: 23.4″L x 20.5″W x 1″H
• Mounting options: Clamp using mounting holes
• Integrated MPPT charge controller saves hassle
• Integrated adjustable bracket improves output
• Adjustable brackets can be bulky on certain areas of the boat
• 50 W rating may be insufficient for some 

The Suner Power 50 W Solar Panel has a 4.4-star rating from more than 1,300 ratings on Amazon .

Buy the SUNER POWER 12 V 50 W Solar Battery Charger:

5. Best Portable Marine Solar Panels: DOKIO 160 W 18 V Portable Solar Panel Kit Folding Solar Charger

Weighing just 9 pounds, the Dokio 160 W foldable kit was designed for portability. It can be easily carried like a suitcase, but setting it up is just as easy and usually takes less than a minute. Its 160 W rating offers enough power to run several appliances on the boat, plus, it comes with a decent-quality charge controller and cabling accessories.

This portable panel is a great choice for anyone who wants to use it on s hort fishing trips on the lake, day sailing, or even camping, plus, it’s also good to have around as a backup during power outages.  That said, if you plan on using the boat as a liveaboard or for frequent, multi-day boating trips, you’ll probably want to purchase fixed solar panels instead.

• Power rating: 160 W
• Claimed Efficiency : 22-23%
• Weight: 9 lb
• Dimensions: ‎ 20.9″L x 19.3″W x 1.1″H
• Waterproof Rating: IP65 (panel) 
• Mounting options: Lay flat or rest on brackets (sold separately)
• Highly portable
• Lightweight
• May be difficult to mount on some surfaces
• Need to purchase brackets separately

Dokio’s portable solar kits find a spot on several lists of best portable solar panels, including  USA Today , Treehugger , and BBC Science Focus . 

Buy the DOKIO 160W 18V Portable Solar Panel Kit Folding Solar Charger:

Other Marine Solar Panels to Consider

Atem power monocrystalline flexible solar panel 100 w 12 v.

Atem Power’s flexible, all-black solar panel is one of the sleekest-looking marine solar panels on the market. If you have a modern boat or yacht, the Atem Power 100 W Panel will certainly preserve its aesthetic. It also has a low weight of 7 lb and a noteworthy efficiency of 22%. The only downside is that some customers mention a relatively faster rate of degradation, so you probably won’t get full power from it after a few years. The ATEM POWER Monocrystalline Flexible Solar Panel 100 W 12 V is available at Amazon for $119.99.

Renogy Bifacial 115 W 12 V Solar Panel

Renogy’s bifacial solar panel has an innovative design that generates power from both sides. While bifacial modules aren’t super common for marine applications, boats with white hulls reflect enough sunlight to allow the Renogy Bifacial 115 W to generate up to 30% more energy than a traditional panel of the same size. Unfortunately, the Bifacial 115 W Solar Panel isn’t popular among boaters, leaving us with a very small number of first-hand experiences. Since there aren’t a ton of reviews, we didn’t feel comfortable including it in our list of the best. The Renogy Bifacial 115 W 12 V Solar Panel is available at  Amazon for $129.99 . 

XINPUGUANG 400 W Flexible Solar Panels Kit

If you’re looking for a full-fledged solar panel kit that’s capable of powering large boats, the Xinpuguang 400 W kit is a great option. It includes four high-efficiency flexible solar panels, a charge controller, wiring, and connectors. However, if you have some working knowledge of solar panel component selection, you can create your own kit for cheaper — especially because this is one of the priciest options we found at over $400. The Xinpuguang 400 W Flexible Solar Panels Kit is available at  Amazon for $469.90 .  

Topsolar Solar Panel Kit 20 W 12 V

Not everyone is looking to power fridges and computers on their boats — some folks just want to keep their phone battery charged or power a small fan on a hot fishing trip. The Topsolar 20 W kit is a good choice in such cases since it comes with a compact, high-efficiency solar panel, a charge controller, and some cabling. However, because it doesn’t have separate positive and negative terminals with MC4 connectors, wiring is a bit tough. The Topsolar 20 W Solar Panel Kit is available on Amazon for $29.99 . 

Why You Can Trust Us

Hi! My name is Aniket Bhor, and I’ve been passionate about solar energy for the past decade or so. Over the years, I’ve worked at solar power companies on three different continents and written for sites from a dozen countries worldwide. I love using my experience in the solar panel manufacturing, design, and installation sectors to recommend the best products for Go Downsize readers. 

Go Downsize, started by Morten and Maria , is a highly reputable source of information related to downsizing and space optimization. With over 20 million YouTube video views, Morten and Maria’s blog is one of the most trusted platforms on the web for downsizing content, whether it’s related to RVs, boats, or trailer homes.

To come up with our list of the best marine solar panels, I worked with Morten and Maria to consider different factors like efficiency output, power, features, and pricing. We utilized our first-hand experience and discussed our favorite features, ultimately narrowing our roundup down to six of the best options on the market.

What to Know About Marine Solar Panels

Things to Consider When Choosing a Marine Solar Panel

Finding the best marine solar panel will vary. To choose a good option for your needs, you should think about a few different details. 

Power rating

The most important specification to consider when looking at solar panels is their power rating. The rating of a solar panel will tell you how much energy it can generate throughout the day. Naturally, boats with a greater number of appliances will need one or more solar panels with a higher rating. 

Typically, most boats need anywhere between 150 and 300 watts to power a few basic devices such as phones and laptops. Buyers can also use a solar calculator to figure out the correct solar panel size for their needs. This will also vary on the type of batteries you use (deep cycle vs. lithium), and also whether you recharge your batteries with your boat’s high output alternator. 

It is also important to note that the required power rating will change with the location of the application . For instance, solar panels on a boat in Florida or California will generate more power than those on a boat in New York.  

While the power rating of a solar panel signifies how much power it can generate, its efficiency will tell you how much power it can generate per unit space. High-efficiency panels can generate more energy in a smaller space.

Higher efficiency is important particularly for marine applications since there is limited mounting space on a boat. High-efficiency solar panels are typically also built using Grade A or A+ solar cells, which have a low rate of degradation and more reliable performance.

Mounting Options

Most boats or yachts aren’t designed with solar panels in mind. As such, mounting traditional solar panels on the hull can sometimes be challenging. For boats with sufficient mounting space, traditional solar panel designs are perfect, since they’re also cheaper. You can simply clamp the panels on any flat surface with nuts and bolts.

But for boats with uneven surfaces, flexible solar panels can be a great option. Many flexible panels come with adhesive back surfaces — all you need to do is peel off the sticker and paste the solar panel on the hull. If you own two boats that you use alternatingly, you may even want to consider portable solar panels that can be laid down on the boat and packed and moved again within a few minutes.

Build Quality

The best solar panels can last 25 or more years. But on the opposite end of the spectrum, there are solar panels that stop working within two years. Solar panels are complex, sophisticated electronic devices, which means building a good-quality solar panel isn’t an easy feat. 

This makes it important to use products from reputable brands. Top-quality solar panels have a low rate of degradation. For example, a good solar panel will still generate 80% of its rated output after 20 years of operation. Many companies also offer a power production guarantee like the one mentioned above. It is also important to check the warranties on marine solar panels. A panel with a 10-year warranty is obviously a better choice than one with a 2-year warranty.

Waterproof Ratings

Solar panels are designed to be left outside in the rain, but when it comes to the cables or junction boxes, waterproof ratings vary dramatically. When shopping for a marine solar panel, be sure to check the IP ratings on the connectors, because you may want to add additional protection for heavy rain or waves. 

Are Solar Panels Worth it on a Boat?

Yes, solar panels are certainly worth it on a boat. Solar panels are quiet and clean, and there are no hassles of running out of fuel or frequent maintenance. With the right equipment, boat or yacht solar panels can power pretty much anything on a boat, and last for significantly long periods. Moreover, modern solar panels are also much cheaper than their older versions, making them a must-have on any boat. 

If you’re keeping a boat in a marina as a liveaboard, electric power can be notoriously expensive, and solar panels can help reduce the overall cost. For liveaboards on a mooring or anchorage, they’re necessary for keeping things charged (constantly running an engine or generator to charge batteries isn’t really a viable long-term option). Or, when you’re underway on day trips or longer adventures, solar panels can provide backup power in remote areas, so they are an excellent investment for any vessel. 

How to Charge a Marine Battery with a Solar Panel

Charging a marine battery with a solar panel is pretty straightforward. Solar panels generate direct current, which can be sent straight to the battery for storage, so you only need a charge controller to optimize the charging and improve safety. Just connect the solar panel’s terminals to the “PV” ports on the controller and connect the “battery” ports on the controller to a battery using another set of cables. From there, the charging begins.

The size of the battery will dictate the required size of your solar panel. If you have a 50 Ah, 12 V marine battery, this means you have a 600 Wh storage capacity (50 x 12 = 600). A typical, 160 W panel will generate around 600 Wh on a decently sunny day. You can also use a solar battery calculator to figure out the exact combination of solar panels and marine battery you’ll need. 

How to Install Solar Panels on a Boat

There are several ways to install solar panels on a boat. You can do a hard mount by drilling holes and securing the panel with nut bolts, or use a bimini-mounting system. Some solar panels can also be tied down to the boat with ropes or cables.

When installing wiring, you’ll want to invest in through-deck wire seals if you’re drilling holes through into the deck. These help to protect the core of the boat from water intrusion. If possible, it’s best to utilize existing tubing in the pulpits and stanchions to minimize the amount of exposed wiring. 

Thin, flexible solar panels can be pasted to the boat’s surface with an adhesive. However, if not pasted/caulked properly, these panels can catch wind and get damaged or come off entirely. Some good brands of durable adhesives /sealants are Boat Life, 3M, and Sikaflex. 

Solar panels can also be mounted on a pole using the correct mounting brackets. In places where the sunshine isn’t strong enough, it even makes sense to use adjustable brackets which allow you to change the orientation of the panel, helping it absorb more sunlight and generate more energy. These could also be mounted on the sides of the stern pulpit, and fold down or collapse when not in use. 

You can also utilize flexible panels on biminis, or create a solar arch structure that, with fixed or flexible panels, can be combined with wind turbines, antennas, and davits — but it takes some thinking outside of the box and creative designs. Before installing the panels, it might be helpful to map out a few ideas for ways to maximize space options and capture the most sunlight possible. 

How Many Solar Panels Are Needed to Power a Boat?

The number of solar panels needed to power a boat depends on the size of the boat, the number and wattage of the appliances on board, and the power rating of the solar panels. Typically, 200 to 300 watts of panels are sufficient enough to power a small to medium boat if there aren’t any power-hungry appliances on it. Considering the most popular panel size of 100 W, you would need two to three solar panels to power electrical equipment on a boat.

Are There Solar Powered Boats?

It is possible to build a boat that operates entirely on solar power, and several prototypes have already been built and demonstrated. However, to propel an entire boat will need a large number of solar panels. Usually, there isn’t enough space for this on traditional boats or yachts. 

Most solar-powered boats today are engineered to have extremely light structures and aerodynamic designs to minimize the number of solar panels needed. On the other hand, the energy density of gas or diesel is much higher, meaning a small fuel tank and motor can power the entire boat more easily, even if the boat is relatively heavy. Thankfully, marine and sailing yacht solar panels are becoming more efficient, and soon solar-powered boats may become mainstream.

Related Posts

• How Do Boats Have Electricity
• Popular Boats for Living
• How Much Solar Power do Campervans Need?

Prices were accurate at the time of publication. 

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The Different Types of Solar Panels for Boats

• 1 Monocrystalline Solar Panels
• 2 Polycrystalline Solar Panels
• 3 Thin-Film Solar Panels
• 4 Amorphous Solar Panels
• 5 Semi-Flexible Solar Panels
• 6 Rigid Solar Panels
• 7 Conclusion

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As the world’s focus on sustainability intensifies, the allure of harnessing solar power for various applications, including marine settings, has grown significantly. For boat owners and enthusiasts, embracing solar panels offers a gateway to a greener and more self-sufficient way of navigating the open waters. The sun’s natural energy can power boats, reducing reliance on conventional energy sources and minimizing environmental impact.

In this blog, we delve into the diverse world of solar panels for boats , exploring the advantages and characteristics of each type. Whether you sail the vast ocean or cruise along tranquil rivers, understanding the array of solar panel options available will empower you to make informed decisions in embracing renewable energy and charting a course toward a more sustainable future on the waves.

Monocrystalline Solar Panels

Monocrystalline solar panels are known for their efficiency and sleek design, making them popular for boat owners seeking maximum power output in limited spaces. These panels are made from a single crystal structure, allowing them to convert sunlight into electricity efficiently. Monocrystalline panels boast an excellent power-to-size ratio, making them perfect for boats with limited roof or deck space. While they tend to be more expensive than other types, their durability and efficiency make them a wise long-term investment.

Polycrystalline Solar Panels

Polycrystalline solar panels are another prevalent option for marine applications. Unlike monocrystalline panels, polycrystalline panels have multiple crystal structures, slightly reducing their efficiency. However, they are more cost-effective to manufacture, making them a budget-friendly choice for boat owners. Polycrystalline panels are bulkier than monocrystalline panels, so they may require more space for installation. If you have ample deck or roof area on your boat and are looking for an economical solar solution, polycrystalline panels can be an excellent choice.

Thin-Film Solar Panels

Thin-film solar panels are highly versatile and lightweight, making them an attractive option for boats. They are created by depositing thin layers of photovoltaic material on various substrates, such as glass, metal, or plastic. Thin-film panels have lower efficiency than crystalline panels but perform better in low-light conditions, making them suitable for overcast or shaded areas on the boat. The flexibility of thin-film panels allows for easy installation on curved or irregular surfaces, making them an ideal choice for boat owners who value adaptability and space efficiency.

Amorphous Solar Panels

Amorphous solar panels, a subset of thin-film technology, are created by depositing non-crystalline silicon on a substrate. They are highly durable, lightweight, and flexible, making them a perfect fit for marine applications. Amorphous panels perform well in low-light conditions and have a better temperature coefficient than crystalline panels, meaning their efficiency drops less in hot environments. While they may have a lower efficiency overall, their ability to generate power in diverse conditions can be advantageous for long journeys or unpredictable weather conditions.

Semi-Flexible Solar Panels

Semi-flexible solar panels offer a middle ground between traditional rigid and thin-film options. These panels feature a thin layer of solar cells embedded in a flexible plastic or polymer material. Semi-flexible panels can conform to curved surfaces, making them suitable for mounting on boat decks, cabins, or sails. They are lightweight and easy to install, often requiring adhesive rather than bolts. While their efficiency might not match rigid crystalline panels, their versatility and ease of integration make them popular among boat owners.

Rigid Solar Panels

Rigid solar panels, typically monocrystalline or polycrystalline materials, are the most common type in various applications. While they are less flexible than other options, they remain a reliable and efficient choice for boats with ample deck or rooftop space. Rigid panels are durable, weather-resistant, and can deliver higher power outputs. They are ideal for boats with higher energy demands, such as those with multiple electronic devices or appliances.

Solar power is revolutionizing how we generate energy, and boats are no exception to this transformation. As boat owners seek eco-friendly and cost-effective solutions to power their vessels, solar panels offer a reliable and sustainable answer. Understanding the different types of solar panels available for boats is crucial in selecting the right solution for your needs, considering factors like space availability, budget, and desired efficiency. Whether you opt for monocrystalline, polycrystalline, thin-film, amorphous, semi-flexible, or rigid solar panels, embracing solar energy will propel your boat toward a greener and more independent future on the water.

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Best boat solar panels: 6 options for boosting your yacht’s power

• Phil Sampson

We take a look at 6 of the best solar panels for boats, from folding units to cutting-edge flexible panels

Free power forever? If only it was that simple! Photo: Graham Snook

For many in the boating community, boat solar panels represent something of a holy grail. They are, after all, the gift that keeps on giving, aren’t they? Free power forever, (or many years anyway), coupled with zero running costs – what could possibly be better than that?

All you have to do to make this dream come true is banish the memory of the purchase price from your mind – something boaters are notoriously adept at doing – and wait for the sun to shine. If only it were that simple…

The fact of the matter is that there are costs associated with boat solar panels beyond the price of the panels themselves. While some types of panels can be simply laid on the deck, in many cases some form of mount will be required.

Then there’s the wiring to hook them up to your battery, plus any fitment and/or cosmetic work needed to hide the cabling from view. If your panels are to be left connected permanently, you’ll require a regulator too.

This will prevent both overcharging and a reverse flow of power out of the battery after dark. If you do not fit a regulator, a blocking diode can be used to halt the reverse flow instead.

But once all of the above have been overcome – and providing you’ve done your homework to ensure your panels will generate sufficient power to cover your needs – then, yes, it’s a power free for all!

There are many other benefits to boat solar panels too: First and foremost, they work all on their own – solar panels are automatic, so you can just let them get on with the job.

Apart from the occasional wipe over and a wiring check, they’re largely maintenance-free too. Unlike wind generators, (especially like the one with wonky bearings on that boat moored next to you), they don’t make any noise.

And finally, your battery will be pleased, because keeping it from going flat can extend its life.

Here’s our choice of the best boat solar panels.

6 of the best boat solar panels available right now

Giosolar 1,000W flexible solar panel

Best flexible boat solar panel

Delivering a mighty kilowatt of power, (not far off the amount used by a one bedroom house), this Giostar package comprises ten separate 100W panels, each of which is 1,050 x 540 x 2.5mm in size.

Capable of charging either 12 or 24V batteries, a kit of this magnitude is one for the most serious of solar enthusiasts – Eco Experts reckons 660-990W is sufficient for a liveaboard.

Giostar panels are abrasion resistant, anti-rust and dust proof and their junction boxes are sealed and waterproof. The panels are also light, thin and flexible, and can withstand being bent up to 30 degrees.

Price: £1,464.45

Buy it now on Amazon (UK)

Note: We may earn a commission when you buy through links on our site, at no extra cost to you. This doesn’t affect our editorial independence.

Mobisolar 100W foldable solar panel

Best foldable boat solar panel

Mobisolar’s foldable panels are light (4.5kg) and measure 121 x 56.5 x 3 cm when unfolded, with the longest dimension reducing to 60 cm when folded, making them easy to transport.

The panels use advanced technology to provide superior performance, with each panel subjected to a thorough testing routine before and after assembly.

So confident is Mobisolar in its products that the company stands behind its panels with a two-year defect warranty and a five years’ electrical performance warranty.

For maximum flexibility in operation, three USB power outputs are fitted per panel, one delivering 100W, the second 60W and the third 10W.

Price: £145.00

Buy it now on eBay

Eco-worthy 100W solar panel kit

With 100W panels being ideal for keeping batteries topped up, our second offering in this power class is from Eco-worthy, a major player in the solar panel field.

Competitively priced, our link below is for a kit which includes an LCD control unit and four ‘Z’ brackets in addition to the panel itself.

The Eco-worthy 100W panel is of the monocrystalline type, which means their cells are made from an ingot grown from a single silicon crystal of high purity. It’s also a rigid panel, so this particular product would need to be mounted on a frame or flat surface.

Price: £113.99

PV Logic 20W Flexi solar panel

Offered by Force 4 Chandlery, this lightweight semi-flexible solar panel comes complete with a dual battery solar charge controller.

The panel is completely waterproof thanks to its six-layer, heavy-duty laminate finish, and should a wayward crew member plod over it in their size 9s the panel’s dimpled top surface is ‘self healing’.

The controller can handle both 12 and 24V systems and the panel’s PWM (Pulse Width Modulation) charging system is efficient and battery-lifetime friendly.

Supplied with LED battery-status indicators and 4 metres of cable, PV Logic Flexi panels can be bonded to flat or curved surfaces.

Price: £149.95

Buy it now on Force 4 Chandlery

Powoxi 10W solar panel

At the budget end of the market comes this Powoxi 10W solar panel charger kit. While you won’t go far on just 10W of power, this kit claims to be capable of charging and maintaining various 12V batteries.

The kit features a fully automatic charging and maintenance controller, which provides intelligent three-level charging and protection against short- and open-circuits, under voltage and overloading.

A reverse flow system is included and the interface is described as ‘plug and play’. While the panel is rainproof, it will not withstand immersion in water, so this is a product to perhaps leave behind on the dock when you take to the water.

Price: £27.59

Eco-worthy 10W/5W solar panel

The least pricey option we could find anywhere, this baby 5W solar panel is simply a trickle charger. But if that’s all you need then look no further, for this is another Eco-worthy product.

The technology in the panel is polycrystalline, so it’s not the most efficient on the market, but for this power that’s hardly a great concern.

The panel is supplied with two charging options; a pair of crocodile clips which attach directly to the battery, and a cigarette lighter plug.

According to the product’s eBay listing, this seller alone has sold approaching 3,000 of these units – and at this price, we can understand why!

Price: £9.99

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4 Best Flexible Solar Panels for RVs, Boats & Curved Surfaces

One of the best things about solar panels is that you can set them up anywhere you want. The only trouble is when you’re eyeing irregular and uneven surfaces. Straight, rigid solar panels will topple over these. So for convex surfaces and roofs, flexible, bendable solar panels are the way to go.

Of course, the best flexible solar panels have to be up to a certain standard. Keep an eye out for the following things to see whether you’re getting top-quality, high efficiency flexible solar panels:

• Flexibility: The main point of buying flexible solar panels is ensuring that they’ll be snug when mounted on curved surfaces, unlike conventional solar panels that are stiff and rigid. Flexible panels usually bend upwards of 30 degrees. If you go for one that is extremely durable and innovative in design, you can bend it at 248-degree angles.
• Lightweight: Flexible solar panels should be portable and easy to bring around, especially if your vehicle is small. Try looking for ultra-light panels that go from 3-5 lbs. You could also opt for slim ones, as thin flexible solar panels are likely to bend more. Plus, when your panels are light and easy to carry, the installation will be a breeze.
• Emits a good amount of solar power: While the design of your flexible solar panels is important, you can’t forget that its primary purpose is to provide solar power. Look for a flexible panel that gives off at least 100 watts of energy at a time.

There are numerous other factors you need to consider when choosing flexible solar panels for car roof mounts or the top of your RV, which are usually curved to a certain degree. You can check them out in the buying guide later in this review.

For now, here are the top-rated flexible solar panels for RV roofs, boats, and other curved surfaces people might want to set up their renewable energy source on:

Best Overall

Renogy Flexible Solar Panel

✅ Bends to 248 degrees

✅ Laminated in multiple layers

✅ Corrosion-resistant aluminum frame

Premium Choice

Topsolar Flexible Solar Panel

✅ High-efficiency monocrystalline cells

✅ Made with durable ETFE material

✅ Thin and lightweight

Editor’s Choice

SunPower Flexible Solar Panel

✅ Copper foundation panel cells

✅ Can bend up to 30 degrees

✅ 2 year warranty

Table of Contents

1. Renogy 175W 12V Flexible Solar Panel

2. topsolar 100w flexible solar panel, 3. sunpower 110w flexible solar panel, 4. xinpuguang 200-watt flexible solar panel, what to look for when buying flexible solar panels, how to install flexible solar panels, are cheap flexible solar panels any good, do flexible solar panels get hot, top 4 flexible solar panel reviews.

• Wattage: 175W
• Panel Type: Monocrystalline
• Curve Radius: 248 degrees
• Warranty:  5 years

In my opinion, this is one of the most flexible monocrystalline solar panels on the market. It’s designed to bend by 248 degrees, which is a far cry from other flexible panels that can only go as far back as 30 degrees.

This flexible panel is built to last. The sheets are laminated in multiple layers, allowing for extra protection of your monocrystalline solar cells. It’s also encased in a corrosion-free aluminum framing for even more sturdiness.

It boasts a back sheet that helps dissipate excess heat to avoid issues with overheating, which can render your solar panel useless.

I don’t have to worry about losing power in low-light areas with this solar panel. Because it’s made with bypass diodes, I can rest assured that there won’t be power drops even when my solar panel is in a shaded area.

Installation of this Renogy flexible solar panel is also a breeze, thanks to the pre-drilled holes on the back.

• Bends to 248 degrees, unlike other flexible panels
• The panel sheet is laminated in multiple layers
• Its frame is made of corrosion-resistant aluminum
• Has a back sheet that diminishes heat
• Built with bypass diodes so I can still use energy in shaded areas like low light solar panels
• Has pre-drilled holes at the back for easy installation
• Slow customer service
• Wattage:  100W
• Curve Radius: 30 degrees
• Warranty:  1 year

This flexible panel by Topsolar is built with efficient monocrystalline solar cells. They amp up your system’s energy conversion rate by 50%, better than a standard solar panel.

The panel itself is made with ETFE material, which is durable and known to increase light transmittance. It’s also self-cleaning and dirt-resistant, so it’s excellent for lazy users.

To avoid overheating, the backplate is designed with TPT technology. This allows it to dissipate heat and prevent dreaded malfunction while in use.

What’s awesome about this flexible solar panel is that it’s ultra-thin and super lightweight. It stands at just 0.1 of an inch tall and 3.97 lbs in weight. That makes it easy to transport and set up when you’re on the road.

It’s also waterproof and resists high temperatures, so it’s well-suited for extreme weather. It would go great in marine settings, like boats.

• High-efficiency monocrystalline cells increase energy conversion by 50%
• Made with durable ETFE material that is self-cleaning and dirt-resistant
• Backplate is made with TPT technology to dissipate heat
• Thin and lightweight at 0.1 inch in height and less than 4 lbs in weight
• Waterproof and resistant to high temperatures, so it’s great for marine use
• Some of the solar cells burn out faster than others

• Wattage:  110W
• Panel Type:  Monocrystalline
• Warranty:  2 years

SunPower’s flexible panel has solar cells uniquely fashioned with a solid copper foundation. This allows your panel to resist corrosion and impact, extending its lifespan significantly.

This solar panel bends up to 30 degrees. While it’s not one of the most flexible solar panels out there, it’s perfect for spaces and surfaces that are only slightly curved.

It weighs a mere 4.4 lbs, making it a good portable solar panel. Because of that, this SunPower flexible panel isn’t a hassle to bring around and doesn’t add extra weight to your travels.

Semi flexible solar panels like this one come with quick-connect cables that make them easy to set up, even for newbies without experience in solar panels.

For those buying flexible panels for the first time and who want to avoid getting a bogus item, don’t fret. SunPower offers a product warranty for up to two years. Plus, their warranty doesn’t have a saltwater exclusion, so the brand will always assist users no matter the issue with their flexible solar panel.

• The solar panel’s cells are made with a copper foundation
• Can bend up to 30 degrees for slightly curved surfaces
• Weighs only 4.4 lbs, so it’s a portable panel that’s easy to carry around
• The quick-connect cables aren’t complicated to set up even for newbies
• The brand offers a warranty for two years without a saltwater exclusion
• Lower power output if the sun is not directly hitting the solar panel
• Curve Radius: 30-40 degrees

This solar panel kit by XINPUGUANG is excellent because I don’t have to buy separate tools and parts to set up my flexible panel and power station. It comes complete with a charge controller, connectors, alligator clips, and other accessories to get me started right away.

The flexible solar panel is designed with five layers to enhance performance and extend its lifespan. These include a TPT backing, which protects your panel from overheating.

In the middle of the layers is the solar panel’s monocrystalline solar cells. These cells allow for a higher-than-usual conversion rate of 19.5%. The monocrystalline cells also work hard to perform well even in shaded and low-light settings.

The connectors and junction box are made with IP67 technology, making them waterproof. It’s fantastic since I often worry about water damage destroying my solar panel kit.

• Complete kit comes with a charge controller, connectors, clips, and more
• Panel has five layers, including TPT backing to protect against overheating
• Monocrystalline solar cells that convert 19.5% of solar energy into power
• Performs effectively even in shaded settings
• Connectors and junction box are made with IP67 waterproof technology
• Sometimes puts out a bit less than 200 watts

ECO-WORTHY 130W Flexible Solar Panel (Outdated)

This 130-watt flexible solar panel by ECO-WORTHY can generate up to 520 watt-hours each day, provided that the flexible panel is charged for four hours under bright, direct sunlight.

It’s built with advanced polymer, which is very sturdy but is more lightweight than a traditional solar panel or glass solar panels.

The flexible solar panel is easy to manage and install because it’s very lightweight and thin. It weighs only 4.62 lbs, so it’s not a hassle to lug around as you set it up. Its thickness is just 0.1 inch, so it’s never bulky.

There are four installation holes that are metal-reinforced on the frame of this solar panel. They’re perfect for screwing the panel into a more permanent area if you’re sure of where you want to set it up for the long term.

Because it’s designed with IP65 technology, your flexible solar panel can surely withstand tough weather conditions, be it harsh rains or intense snow.

• Generates up to 520 watt-hours per day in just four hours under sunlight
• Built with polymer, which is more lightweight than traditional glass panels
• Weighs only 4.62 lbs and is thin at 0.1 inches, so it’s easy to bring around
• Has four installation holes with metal for screwing onto any surface
• Designed with IP65 waterproof technology to resist damage from weather
• Protective film on top of the panel deteriorates quite fast

HQST 100-Watt Flexible Solar Panel (Outdated)

Like most flexible solar panels, this one from HQST can bend 30 degrees. It allows for a snug fit that doesn’t move around or topple over on curved surfaces, like vehicle roofs and boat decks.

Since the flexible solar panel is made only with high-grade and top-quality materials, it’s able to withstand harsh weather. The solar panel is made with ETFE, a durable material that isn’t that heavy. ETFE also paves the way for more light energy transmittance in your solar panel.

You also have efficient monocrystalline solar cells to thank for the high energy absorption rate. This type of solar cell converts 50% more solar energy than other solar panels, assuring you of excellent power output levels.

This solar panel’s junction box is waterproof because it’s designed with IP65 technology. It’s one of the most important components of a solar panel system, so it’s terrific that it gets this extra protection.

• Can flex up to 30 degrees to accommodate curved surfaces and roofs
• High-grade materials let the solar panel withstand inclement weather
• Made with ETFE, a material that allows for more light transmittance
• Monocrystalline solar cells convert energy 50% more than other panels
• The panel’s junction box is waterproof, thanks to IP65 technology
• Comes with a protective film that is difficult to peel off

TopSolar 50-Watt 12-Volt Flexible Solar Panel (Outdated)

This flexible solar panel by TopSolar can be bent into an arc to fit curved and irregularly shaped surfaces, like those on boats, RVs, trailers, and more. The arc can go up to a maximum of 30 degrees.

It’s extremely light at around 2.4 lbs, which is easy to hold and carry while you’re installing it. It’s also very thin at 0.1 of an inch. Because the design is slim and featherlight, set-up is very easy and relatively faster than with a conventional, rigid solar panel.

The panel is made with a special back contact technology that works to remove the electrodes blocking your solar panel from absorbing light energy efficiently.

You can charge the standard 12-volt batteries with this panel, since that’s what it was created for in the first place. But when you chain up multiple of these solar panels together, you can charge 24-volt and even 48-volt batteries with no problem.

These solar panels are resistant to water and high temperatures, lessening their chances of incurring damage.

• Can be bent into a 30-degree arc to fit on irregular surfaces
• Extremely light and thin, making it quick and easy to mount
• Back contact technology eliminates electrodes that block sunlight
• Charges 12V batteries, 24V, and 48V batteries
• Resistant to water damage and high heat levels
• The connectors have plastic retainers that break off easily

Lensun 20-Watt ETFE Flexible Solar Panel (Outdated)

These flexible solar panels by Lensun are made with grade A monocrystalline solar cells, an advanced version of the usual mono cells. These cells increase the efficiency of your solar panel’s energy absorption by up to 22%.

This option’s also built with premium ETFE material, which is resistant to damage from harmful UV rays and corrosion. It also aids in light transmittance, giving you a shot at better power output.

There’s a unique fiberglass backboard in each of these solar panels. It works to dissipate excess heat on an extremely hot day, preventing issues with overheating.

This solar panel is also ultra-thin and super light by design. That way, it won’t add unnecessary weight and gravity to the roof of your car or boat deck.

Its junction box is resistant to weather damage because it’s built with advanced IP68 technology, keeping it waterproof.

I’ll never have to worry about malfunctions with my flexible solar panels because Lensun offers a 24-month warranty for their products.

• Has grade A monocrystalline solar cells that increase power absorption
• Made with ETFE material that is resistant to UV damage and corrosion
• The panel has a unique fiberglass board at the back for heat dissipation
• Ultra-thin and light, so it won’t add extra pressure or weight to your roof
• The junction box is waterproof because it has advanced IP68 technology
• Lensun provides a 24-month warranty for our purchase
• The panels cannot be bent more than 20 degrees

POWOXI 100-Watt Flexible Solar Panel (Outdated)

These solar panels by POWOXI have cells made of monocrystalline silicon. This material allows for a higher light transmittance rate, pushing it up to about 95%.

Because this solar panel flexes and bends in an arc when positioned, it has multiple refractions of light. This allows for a faster charge of your batteries since you’re getting solar energy from different angles.

The panel is built with durable yet featherlight ETFE material, which is known to have a lifespan of up to 15 years. That means your flexible solar panels will last you quite a while without needing to be replaced.

It’s made with IP67 waterproof technology, so the solar panel will be sturdy enough to survive the toughest weather conditions.

Installation via screwing is very easy with this flexible solar panel. It has four holes on the corners of the frame so I can do it quickly, no drilling needed.

• Cells are made of monocrystalline silicon for a 95% light transmittance
• Multiple refractions when bent in an arc allow for a faster charge
• Durable ETFE material gives the solar panel a lifespan of up to 15 years
• Created with IP67 technology, making the solar panels waterproof
• Has four pre-drilled holes on the corners of the frame for easy installation
• The MC4 connector it comes with isn’t too durable

Newpowa 100W 12V Semi-Flex Solar Panel (Outdated)

Unlike other flexible solar panels, this one by Newpowa bends more than just 30 degrees. It goes to a maximum of 248 degrees, so it’s beneficial for roofs and surfaces that are extremely convex.

This solar panel is slim and featherlight. It weighs 4.2 lbs and is a mere 0.08 inch in thickness. That makes it fit on any surface, like a second skin. It’s never bulky and is easy to transport.

It’s designed with a high-efficiency combo of monocrystalline cells and top-notch ETFE material. Both work to give our solar panels a higher energy conversion rate to maximize solar power.

This solar panel is also made with IP68 technology, one of the most advanced waterproof grades. This allows it to survive even the heaviest rain and snowfall.

The solar panel has six holes in its frame that are reinforced with metal rings. This makes mounting with grommets or screws quick and complication-free.

• Bends up to 248 degrees, making it one of the top-tier flexible solar panels
• 0.8 inch thin and weighs less than 5 lbs, so it fits easily onto surfaces
• Monocrystalline and ETFE materials for a high energy conversion rate
• Made with IP68 technology, so it’s resistant to heavy rains and snow
• Has six holes with metal rings for uncomplicated mounting
• None so far

Framy 200-Watt PET Flexible Solar Panel (Outdated)

This Framy solar panel is semi-flexible, meaning it can bend only to the usual 30 degrees. That said, it’s perfect for irregular yet smooth surfaces on your boats, cars, or motorhomes.

It’s designed with ETFE material on the top layer, as well as four EVA layers throughout the panel. This gives your solar panels added durability so they aren’t too fragile.

These solar panels charge 16-volt batteries. That’s a bit more powerful than other solar panels that can only charge 12-volt batteries.

Plus, this option is designed with a Schottky diode—a device that prevents the panel from experiencing reverse currents, which can render it useless or unhelpful.

Users also get a waterproof junction box. That way, it won’t be susceptible to moisture damage from the harsh weather or when we’re traveling near bodies of water.

• Semi-flexible panel bends to 30 degrees for irregular yet smooth surfaces
• Designed with multiple EVA and ETFE layers for durability
• The panel charges 16-volt batteries, higher than the usual 12-volt charge
• Has a Schottky diode installed to prevent your current going in reverse
• Comes with a waterproof junction box that isn’t prone to weather damage
• The solar panels may emit lower than 200 watts

Suner Power 30-Watt Flexible Solar Panel (Outdated)

This flexible solar panel by Suner Power is made with polymer instead of glass. This makes it 30% more lightweight than traditional rigid panels.

It has an ETFE lamination to make it extra sturdy. There are also unique Suner Power cells that increase light energy absorption by up to 24% compared to other solar cells in the market.

The panel comes with a smart charge controller with a unique algorithm designed to generate up to 20% more power than regular ones. This controller also protects your batteries from overcharging, short-circuiting, and other disasters.

An LED monitor visually displays all the pertinent information about your battery. It tells you its condition and current charging levels.

The solar panel is IP65 waterproof, preventing damage from rain, snow, and other bad weather conditions. It’s perfect for traveling to places where the weather is unpredictable.

• Built with polymer instead of heavy glass, allowing it to weigh 30% less
• ETFE lamination and solar cells increase energy absorption by 24%
• Smart charge controller gives 20% more power than regular ones
• Protects your batteries from overcharging or short-circuiting
• LED monitor displays your battery’s condition and charging levels
• IP65 waterproof to withstand bad weather
• Only gives off 30 watts of power, lower compared to other solar panels

Winnewsun 100-Watt Flexible Solar Panel (Outdated)

This solar panel by Winnewsun is unique because it’s bifacial, which means both sides of the panel (front and back) can absorb solar energy and store it.

It weighs just 4 lbs, so it’s super light and easy to carry around when you’re traveling. It also doesn’t add unnecessary weight to your load as you drive around.

It has solar cells that convert up to 22% of the light energy it absorbs into stored energy for your use. That’s pretty high compared to flimsy solar cells.

Unlike other solar panels that drop 10% in power over time, this one loses less than 3% of its power in ten years.

Another great thing about this panel is that it works well in shaded and low-light areas because it’s sensitive even to dim sunlight.

• Bifacial design allows both sides of panel to absorb and store light energy
• Weighs only 4 lbs, so it’s easy to bring around and transport during travel
• Solar cells can convert 22% of the solar power it absorbs into stored energy
• Power loss is just less than 3% in 10 years
• Works well in shaded areas because the panel is sensitive even to dim light
• Difficult to set up because of its bifacial design

DOKIO Semi-Flexible 12-Volt Solar Panels (Outdated)

These DOKIO panels have a protective ETFE layer. This allows for greater light transmittance when exposed to sunlight. It also adds extra sturdiness to my panels so they can have a longer lifespan.

Each panel has eight holes evenly spaced throughout the frame. These little rings make screwing the panel with grommets during installation much easier.

It also comes with a junction box and a few connectors—all of which are IP65 waterproof. I don’t have to worry about damaging these accessories even when the weather is undesirable.

The panel weighs only 4.9 lbs, so it’s never a hassle to carry around and install. It’s also extremely flexible; I know that it will fit snugly on any curved surface.

• There’s an ETFE layer for sturdiness and higher light transmittance
• Has 8 holes on the framing that are perfect for grommets and screws
• Junction box and connectors are waterproof, so weather can’t ruin them
• Weighs 4.9 lbs, so users can carry them around with minimal effort
• Extremely flexible, so it’ll fit snugly on any curvy surface
• Emits less power if there’s even just a little bit of shade covering the sun

ExpertPower 110-Watt Flexible Solar Panel (Outdated)

This solar panel is made with top-quality Maxeon solar cells made of monocrystalline. These cells boast a high energy conversion rate, ranging between 22% and 25%.

The panel is built with high-grade yet lightweight polymer, which is easier to work with than the traditional glass used to fashion solar panels.

It can be flexed and bent up to 30 degrees. That isn’t as flexible as the other panels on this list, but it’s enough for slightly curved areas.

There’s a copper foundation under this panel. The copper allows the panel to resist corrosion and other signs of damage, such as cracking.

What’s more, this panel will come with pre-drilled holes to make mounting much faster and easier. There are also MC4 cables included in the set so that connecting the panel to our controllers or batteries is a walk in the park.

• Top-quality Maxeon monocrystalline cells give up to 25% conversion rate
• Built with a high-grade polymer that is lighter than glass
• Can be flexed up to 30 degrees, so it’s suitable for slightly curved areas
• The panel is built upon a copper foundation, resists cracks and corrosion
• Comes with pre-drilled holes and additional connectors for quick set-up
• Can’t go beyond 30 degrees of bending

Made from durable material that withstands tough weather conditions

Look for the best flexible solar panels that are made from sturdy, top-quality materials like ETFE, aluminum frames, and monocrystalline solar cells. Because these materials are durable, they’ll increase the longevity of your solar panels.

Conventional panels are usually made of thicker, heavier materials, like glass. But for thin film solar panels, you need lightweight materials.

You should also keep your eyes peeled for waterproof solar panels designed with IP65-IP67 technology. This prevents water damage to your flexible solar panels when it’s raining. It also keeps it resistant to impact from heavy storms or snow. This is vital if your travels require you to pass through areas with unpredictable climates.

Contains bypass diodes to keep your energy from dropping in low-light areas

Bypass diodes allow you to keep using your photovoltaic cells even when your solar panels are exposed to areas without direct sunlight. Most conventional solar panels will experience power drops when sunlight isn’t available to them, but with bypass diodes, that won’t be an issue.

If you’re looking to use your flexible solar panels for home energy but live in a cloudy city, getting panels that operate efficiently even in the shade is extremely important.

Can provide an adequate amount of power for your needs

Solo or small group travelers who need flexible solar panels for boats, trailers, or cars will probably consume less energy than an entire household. Purchase a flexible solar panel with a power output appropriate for your need.

For example, 100 watt flexible solar panels  might be suitable for quick camping trips with one or two people. However, for a family living at home, a collection of 200W or 300W flexible solar panels might be more apt.

If you want something more intense, go for 400W flexible solar panels.

Manufactured by a top-notch brand based in countries known for quality products

Don’t go for just any flexible solar panel kit. Make sure the new solar panels you purchase are from a renowned brand known to make excellent flexible solar panels that last a long time. Go for those of top brands, such as the Renogy or Sunyee flexible solar panels.

One easy way to tell that your solar panels are high in quality is to check which country they were designed and manufactured in. Some of the most efficient flexible solar panels are created in countries known for quality tech and renewable energy products, like Canada, Australia, and the UK.

Installing flexible solar panels is very simple. It’s quite similar to traditional solar panels. All you have to do is lay them down on the surface you want to mount them on. Then, you must screw on the grommets or use an adhesive to stick the clean flexible solar panels down properly.

If you go with the latter, make sure your solar panel is stuck tight to your surface, so it won’t wobble or come loose. You also need to keep an eye on your adhesive placement. It should never cover your panel’s flexible solar cells, or the blockage might not allow any light absorption.

It’s easier to install flexible solar panels vs rigid ones because they’re so versatile.

Most solar panels that are extremely cheap might not perform up to standard. However, flexible solar panels need not be expensive to be effective.

There are many solar panel brands out there that come up with excellent, durable panels for an economical price tag. So yes, there are many flexible panels that come at a reasonable price.

That said, if you want the most affordable flexible solar panel available in the market, you’ll need to invest more than a couple of bucks. Bigger, more expensive name brands utilize innovative technologies and extra sturdy materials to create top-class solar panels.

Unlike typical panels that aren’t as bendable, flexible panels don’t often get hot to the touch. That’s why they don’t require extra air space to cool down. If they do get too hot, they face the risk of overheating, so that’s something you must watch out for regularly.

Several solar panels in this review have TPT backing, which helps dissipate heat and prevents overheating. This solar technology is beneficial if you travel to hot, tropical areas.

If you’re planning to set up your solar projects on a curved area—say, a roof or on your RV—don’t settle for those rigid, traditional panels. Go instead for those in this flexible solar panels review that will have a snug placement, so they won’t come loose easily.

Plus, because the best flexible solar panels absorb solar energy from multiple angles, you’re likely to get more power than you would with traditional panels. Who can say no to that? Buyers should check out any of the above flexible solar panels for camping, traveling, or even just at home.

I am Kathleen Miller, staff writer and reviewer of the Avasolar team. Working with the team has been a pleasure for me so far, I hope to bring readers useful information by creating detailed and easy-to-follow contents.

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$ 599 $ 399

Live a life without limits! Take your boat, RV, truck, or trailer off-the-grid with Dakota Lithium. This kit offers enough power to charge a single 100Ah battery. Designed for decades of rugged use in extreme conditions, this flexible, marine grade solar panel is waterproof, flexible for curved roofs and boat decks, and is backed up by a 25 year output warranty.

Available on backorder

For larger quantities contact [email protected]

Specifications

100 Watts power output

5.56 amps peak power generation. Latitude and season will impact solar panel output. If you spend a lot of time winter camping in northern latitudes you may want to think about adding an additional panel

18 Volts (V). Can be connected directly to the battery for simple and smaller systems. A solar charge controller is highly recommended since it lowers the voltage to 14.4V and greatly increases the efficiency of the system.

Installation is a breeze with the pre-assembled mounting hardware and wiring. Add a DL Dashboard integration kit for a solar charge controller, battery monitor, and additional wiring harness.

Dakota Lithium's innovative mounting hardware lets you to mount the panels wherever you need them, and the stainless steel mounting hardware ensure your panels won’t budge in route—no matter how far off-road you go. Additional double sided industrial welding tape is included as an alternative to using the hardware, and may be preferable on curved surfaces like boat decks or airstream trailers.

Semi-flexible, marine grade solar panel on a ruggedized waterproof backing. Optimal for rooftops and boat decks. Not designed for walking on. Foot traffic will reduce the lifespan and warranty of the panel.

Divide the Ah (capacity) of your battery by 5 to determine how many hours to charge your battery.

3 ft wire harness with waterproof MC4 connectors.

47.25 in (1200.15 mm) x 21.25 in (539.75 mm) x 0.1 in (3 mm) per panel

25 year power output warranty, meaning the panels are guaranteed to generate power for 25 years.

IP67 Marine grade waterproof rating for use on boats, RVs, and rooftops in the rain

Suitable for:

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• 100 watts charges 50Ah to 100Ah of Dakota Lithium batteries
• Add additional panels for larger systems
• Living off the grid

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Dakota lithium #vanlife, rv trailer & truck 12v 100ah power system, dakota lithium & zamp solar 12v 200ah off-grid power system.

The product itself is of great quality. It is boxed well and comes with all you need. I would recommend it over “less expensive ” and lesser quality items of similar type.

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Home Renewable Energy

9 Best Flexible Solar Panels: Reviews & Buyer’s Guide

Written by : Nikola Gemeš , Updated by: Samira Tasneem | Last Updated: August 8, 2024

Renogy 100 Watt 12 Volt Flexible Monocrystalline Solar Panel

Topsolar 100W Flexible Solar Panel

Renogy 175 Watt 12 Volt Flexible Monocrystalline Solar Panel

SunPower 110 Watt Flexible Solar Panel

Renogy Solar Panel 100W 12V Lightweight Semi-Flexible

Topsolar Flexible Solar Panel 100W 24V/12V Monocrystalline Bendable

SunPower 50 Watt Flexible Solar Panel

RICHSOLAR 80 WATT CIGS Flexible Solar Panel

HQST 100W 12V Monocrystalline Flexible Solar Panel

Durable, foldable, and portable. What more can you ask for? Here, we review the best flexible solar panels in the market today to see which one fits your needs the most.

Packing some tech for a 10-day camping trip: 

Smartphone — check, Kindle e-reader — check, Mavic Mini drone — check, Macbook — check. 

What’s missing? 

A power source to charge them all.

How about a fuel generator? No way. Too darn bulky, noisy, and not very efficient. 

So, how do I charge all these gadgets? 

I use flexible solar panels. In my opinion, they’re perfect for the role. You can literally fold them up and pack them with you wherever you go.

But which ones are worth buying?

Using my experience as an electrical engineer and camper, I was able to identify the best flexible solar panels you can get for this year’s camping season.

My Top 3 Picks for the Best Flexible Solar Panels

Renogy 100 Watt Flexible Solar Panel 

• 100 Watts Output
• Bends to 248 Degrees
• IP68 Water Resistant
• Anti-Scratch Coating
• 25-Year Warranty

• Bends to Arc of 16" 

Renogy 175 Watt Flexible Solar Panel 

• 175 Watts Output

The 9 Best Flexible Solar Panels (Reviewed by An Electrical Engineer)

1. renogy 100 watt 12 volt flexible monocrystalline solar panel.

Wattage: 100 Watts | Panel Type: Monocrystalline | Water Resistance: Yes | Weight: 4.2 lbs

Whether you have a boat or an RV, this flexible powerhouse is only 1/10” thick and fits seamlessly on every surface like a rug. You can flex it up to 248 degrees and it will still work.

The Renogy 100 Watt is also waterproof and extremely durable. I’ve had it working flawlessly in rain and snow. 

At the end of my trips, I regularly have to remove branches and bird droppings, without any visible damage to this flexible panel.

This panel owes its toughness to a special lamination material that gives it a thin but durable anti-scratch layer. No scratches = high transparency and maximum solar conversion. 

• Great for vehicle tops
• High efficiency of conversion
• Super flexible
• 25-year power output warranty
• IP68 water resistant
• Brief instructions

Why Do I Like It?

Renogy 100W is a perfect solar panel for road trips. Fix it to your roof rack and it will power everything you can pack in your SUV. 

2. Topsolar 100W Flexible Solar Panel

Wattage: 100 Watts | Panel Type: Monocrystalline | Water Resistance: Yes | Weight: 3.97 lbs

Bendable to the minimal arc radius of 16 inches, Topsolar Flexible Panels are a great choice for boats, tear-drop trailers, and all curved surfaces.

After reading some negative user reviews on output voltage and amperage, I decided to look into this product myself. 

A bit of testing revealed the issue — the output really depends on the type of controller you use. If you get a quality MPPT (Multiple Power Point Tracker) controller, you’re all set. 

A controller converts excess voltage into more amperage for the battery, which really helps in charging in cloudy conditions.  

On the downside, these flexible solar panels for car roofs feel a bit more fragile than Renogy, so I wouldn't try fixing them for tents and mobile canopies. 

• Only 1/10” thick
• Anti-scratch coating
• Water-resistant
• Not for tents and canopies

If you can’t get a good deal on Renogy 100W, this is a worthy runner-up that won’t leave your gadgets without charge.

3. Renogy 175 Watt 12 Volt Flexible Monocrystalline Solar Panel

Wattage: 175 Watts | Panel Type: Monocrystalline | Water Resistance: Yes | Weight: 6.2 lbs

I switch to a pair of these monocrystalline solar modules if I need a bit more power and although these are a bit larger than most panels I’m reviewing here, they fit nicely on my RV roof.

In my use, these Renogy flexible solar panels have excellent efficiency, even on overcast days. 

Once I tried charging them through the windshield, and after I came home from work, the 42000 mAh portable battery in my van was already fully charged.

With a water-resistant solar connector and the junction box, Renogy 175 Watt is also ideal for marine use.

Just remember to mount them using silicone adhesive on the backside — the grommets are for non-mobile uses only.

• US-based company
• IP68 water-resistant
• Positive cables are short

The speed of charging with these flexible solar panels is unbelievable. If you like to top off your devices on the go, this is the one.

4. SunPower 110 Watt Flexible Solar Panel

Wattage: 110 Watts | Panel Type: Monocrystalline | Water Resistance:  No  | Weight: 4.4 lbs

This SunPower flexible solar panel is a small but rugged ultralight panel that bends up to 30 degree s and folds easily for storage.

Depending on available sunlight, mine delivered anything between 50 and 100 watts. However, even in the shade, it gave me enough juice to power my 12V fridge.

On the downside, if you’re looking for a monocrystalline solar panel for your saltwater boat, you may want to look elsewhere. The warranty on this one does not cover saltwater use. 

Also, I hope SunPower makes connectors easier to disconnect. It's impossible to depress release tabs without a small screwdriver.

• Lightweight
• Easy to store away
• Folds up to 30 degrees
• Inexpensive
• Needs tools to disconnect
• Not for marine use

I found out that this panel size fits perfectly on the Thule cargo box. You can pack extra stuff and STILL stick a solar panel on your roof.

5. Renogy Solar Panel 100W 12V Lightweight Semi Flexible

Wattage: 100 Watts | Panel Type: Monocrystalline | Water Resistance:  Yes  | Weight: 2.4 lbs

If that is not enough, the good news is that these flexi ble solar panels for boats weigh half the fully-flexible 100W model.

This means you can pack two for the same weight. 

They might look simple, but these flexible solar panels are packed with high-tech solutions. The solar cells use half-cut technology that allows the panel to produce more power for the same size.

This is especially important for outdoor and marine use, when panels may come under accidental shading from tree canopies or boat sails. 

Besides, when there’s no sun exposure a diode circuit prevents reverse current flow from the battery to the panels, which reduces their life span. 

• Controller adaptor kit not included

These small flexible solar panels come with extendable connectors. In my use, I often need to place the panels away from the battery to protect it from sunlight.

6. Topsolar Flexible Solar Panel 100W 24V/12V Monocrystalline Bendable

Wattage: 100 Watts | Panel Type: Monocrystalline | Water Resistance:  Yes  | Weight: 3.97 lbs

These semi-flexible panels from Topsolar use solar cells with back-contact technology which d on’t have electrodes on the surface. 

Thanks to this engineering hack, the conversion efficiency is increased to 50% more than panels with exposed electrodes. 

A single panel works like a charm with my 12V battery. If you use a 24V battery, you can easily connect multiple panels in series. Just remember to use a quality controller for the best results. 

Sadly, I learned the hard way that flexible doesn't mean portable with these panels. They are definitely not meant to be mounted and taken down on a regular basis. Only fixed installations for these ones. 

• Very flexible
• Needs high-end controller
• Not for mobile uses

Although it looks textured in the photo, the surface is smooth to the touch. It seems these panels have some kind of water-repellent coating that makes wiping water off very easy.

7. SunPower 50 Watt Flexible Solar Panel

Wattage:  50 Watts | Panel Type: Monocrystalline | Water Resistance:  Yes  | Weight: 3.74 lbs

If you can’t fit one 40x20” panel, you can mount two 20x20” ones, and take your b oar off-grid, even if you don’t leave the marina at all. 

The panel feels solid and I hope it will last for years with normal use. Due to their size, these panels are perfect for camping and road-tripping. 

Still, due to the 50W rating, I can’t give this panel more stars. The math is simple — a 100W panel will recharge your battery twice as fast. 

• Compact size
• PV4-S connectors included
• Only 50 Watts
• Comes in flimsy packaging

If I don’t want to bother with a solar generator, I can use a DC converter with USB outputs and charge my phone directly off the panel. Works on a sunny day.

8. RICH SOLAR 80 WATT CIGS Flexible Solar Panel

Wattage:  80 Watts | Panel Type: Monocrystalline | Water Resistance:  Yes  | Weight: 3.8 lbs

The RICH SOLAR 80 Watt uses the amorphous silicon t hin-film technology that you can easily bend to match any kind of surface. 

The panel is for the most part made of polymers so it’s highly resistant to vibration and fire, but also unbelievably tough — It can even take some foot traffic.  

My only take on these panels is that they’re not the most weather-resistant option out there. Where I live we have scorching summers and unforgiving winters, and after two years of hard outdoor use, I see some delamination.

• Perfect for vehicles and tents
• Can be sewed
• Adhesive cover hard to peel of
• Not for extreme weather

Use the adhesive mountain system to stick it to your RV rooftop or boat hull, but here’s the best part — You can also sew this flexible solar panel to an awning or canopy.

9. HQST 100W 12V Monocrystalline Flexible Solar Panel

Wattage:  100 Watts | Panel Type: Monocrystalline | Water Resistance:  Yes  | Weight: 4 lbs

Use them with a 12V battery or connect two of t hem for a 24V system. 

It’s not the most flexible solar option out there, but it's surprisingly tough for monocrystalline technology. 

The panel backside is made of durable PET, the cell layer is sandwiched between two sheets of EVA, while the business side is protected with anti-scratch film.  

The only thing I don’t like is the packaging. Mine came in a torn-up box with no styrofoam to protect the face of the panel. Your mileage may vary, but this is something HQST and Amazon should definitely look into. 

• Reinforced layers
• Water and dust resistant
• Uses Renogy leads for the junction box
• Comes in poor packaging

Thanks to the protective layers, the entire panel is water-resistant to the standard IP68 and also dust resistant. Keep this in mind if you like RVing in the Southwest.

Are Solar Panels Worth It? Opinions of An Electrical Engineer

Things To Consider Before Buying A Flexible Solar Panel

This is the most important feature when choosing the right solar panel. The higher the wattage, the more devices you can plug in, and for a longer period of time.

For example, a 100-watt flexible solar panel is often used on boats, while 200-300-watt products are used on RVs or off-grid shacks.

To meet their solar power needs, users often connect several solar panels to get the combined wattage they want. The solar panel wattage is directly proportional to its cost.

The solar panel durability depends on the materials used for the solar panel and framing. Certain types of resilient plastic are used to protect solar cells from dust and moisture.

For example, ETFE plastic is a standard in high-end products and provides better durability and light transmission than cheaper PET and PTE materials. Also, keep in mind that crystalline solar panels are considered tougher than solar panels made with thin-film technology.

Leading manufacturers also make their panels water-resistant to be safely used in marine environments.

Solar Technology

There are two solar cell technologies that dominate the flexible solar panel market: crystalline silicon and thin-film.

• The crystalline silicon technology is more widely used. There are two subtypes — polycrystalline solar and monocrystalline solar panels. Initially, these materials are too thick to be flexible, but by arranging them in thinner layers, they managed to give them enough flexibility while retaining excellent solar properties. This makes crystalline solar panels ideal for mildly curved surfaces like RV roofs.
• Thin-film solar panels have photovoltaic layers that are about 300 times thinner than those of crystalline panels. This feature makes these solar panels super flexible so that some of them can even be rolled up for storage. These solar panels typically have self-adhesive surfaces so you can easily “paste” them on metal and glass surfaces. However, as wattage is considered, thin-film technology is way behind crystalline panels of the same size.

Installation

Unlike their rigid counterparts, you can easily install almost any kind of flexible solar panel yourself. Some even come with self-adhesive tapes or velcro, which makes the installation a no-brainer.

Still, if more methods are available, look for a company that provides a detailed installation guide. A company that invests in a quality manual is often the one that trusts the quality of its product. 

Lifespan 

Due to their bendable materials and portability, flexible solar panels can never reach the service life of their quality rooftop counterparts. You can use them for a variety of applications, but they will never last as long as rigid aluminum and glass solar panels.

This is why you should always look for panels with the longest lifespan .

How to know this? Choose brands that offer at least a 5-year warranty on materials.

Buying vs. Leasing Solar Panels: Which Path Should You Take?

What Are Flexible Solar Panels?

Flexible solar panels are bendable, portable solar modules that you can use outdoors, on cars and RVs, boats, and off-grid cabins.

They are lightweight and versatile, so you can easily transport and deploy them as you go. Some thin-film solar panels even roll and fold.

This flexibility makes this type of solar panel more durable than standard ones, while the curved surface gives better performance in low-light conditions.

The durability is important, as they need to perform off-grid in various elements, like rain, snow, and dust, and withstand sudden changes of temperature.

Compared to rigid silicon-based solar panels, flexible solar panels have lower efficiency, but their many advantages make up for that.

Nikola Gemeš

Nikola, an electrical engineer, simplifies intricate sustainability subjects for his audience. A staunch environmental conservationist, he embodies his beliefs daily through recycling and cultivating his own food.

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16 Comments on “ 9 Best Flexible Solar Panels: Reviews & Buyer’s Guide ”

Thank you so much this information was certainly helpful! I was puzzled about this Renogy flexible solar panel. Some people report solar panel failure after only four months, while others say their system lasted several years.

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Thank you for sharing this piece, it’s a great topic. Are you looking for solar panels? You can get the best quality and cheapest solar panels at affordable prices.

Hi, I found a top of the line [expensive] sailboat manufacturer that mounts the monocrystaline Solbian Panels flat on the deckI have been told the newer panels can handle the heat build up with no airspace behind the panels for ventilation. This used to guarantee less efficiency and shorter life. Is this the case and if so which are the best efficient long lasting panels? Solbian are very expensive. Thanks very Much, Derek

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Great article! One of the best things about solar panels is that you can set them up anywhere you want. The only trouble is when you’re eyeing irregular and uneven surfaces. Straight, rigid solar panels will topple over these.

We love the 4 Solar Cynergy panels I mounted on our RV so much I just ordered 2 more! A great value for the Wattage. With my current setup we can run our RV’s AC for @ 15 minutes/hour. At night we still have enough power to run fans (and the AC a little if it is warm), the tv, charge phones, run the refrigerator all the time and all of this while being stealth.

I am very happy with this Renogy 100W Extremely Flexible Monocrystalline Solar Panel. I use it to charge my Webetop 155Wh 42000mAh Portable Generator Power Inverter Battery 100W. I love it because it has unbeatable flexibility, capable of producing a 248-degree arc. It is exceptionally lightweight at about four pounds, which helps me easily carry it around and install it by myself. It is also 95% thinner than traditional solar panels, giving it a stealthy appearance on my RV. While it is lightweight, it can resist 5400 Pa of snow and 2400 Pa of strong winds. Its junction box is also IP68-rated. It makes me feel more comfortable about the product’s safety and performance.

Considering the material used to make the solar energy collection component of these thin film panels, are they the same/come from the same place as the standard regid solar panels? I had read somewhere about a process that used a “slury” type material that coated thin sheets and were used to collect the solar energy. The material was better for the environment as compared to the standard. Can you comment on this? I would like to see all local public transportation, school buses, USPS and delivery/pick-up companies use these type of panels to suppliment energy for hydraulic hybrid drive system vehicles. UPS and the EPA have very promising data on UPS trucks using the hydraulic drive systems. Using these panels would boost energy savings from 60-70% to well over 80%, reducing emissions by at least 60%.

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Thank you so much this information was certainly helpful! There are numerous other factors I need to consider when buying flexible solar panels for car roof mounts or the top of my RV. Again thanks

Would this type of panel be good for a she shed? If I run a few electronics like a sewing machine & some lighting, 1-2 burner stove for tea, a blender & a few other small craft tools, possibly a portable heater…. I would be able to put up more than 1 as needed, but wondering if a “regular” panel would be better for me?

Brian at RV with Tito has an improved mounting method, giving the panels room to breath underneath.

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LensunSolar Flexible Solar Panel: an exceptional and highly efficient solar solution engineered for versatility. Boasting cutting-edge technology and an advanced design, it stands out as the premier choice for RVs, campers, boats, roof tents, and beyond. Our state-of-the-art technology incorporates specialized materials that shield solar cells from harsh weather elements such as extreme winds, heavy snowfall, and hail, thus guaranteeing prolonged panel durability. Featuring a unique patented material coupled with leading-edge technologies, our panels can effortlessly conform to curved surfaces of up to 230 degrees, offering unparalleled flexibility in installation. Furthermore, LensunSolar offers bespoke flexible solar panels tailored precisely to your specifications, including shape, logo integration, size, voltage, and power output, ensuring a flawless match for your requirements. With strategically located warehouses worldwide, we prioritize swift shipping to expedite delivery and alleviate import taxes for your convenience.

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Using A Solar Battery Charger for Your Boat

A reliable power source on board will keep all of the electronics running and maintain comfort out on the water. Traditional methods, such as generators, can be noisy, require fueling, and produce emissions. Solar battery chargers use a clean, renewable, silent alternative to run the electrical systems on your vessel. Choosing the right solar charger size by your specific power requirements is the key to fully harnessing the potential of your solar setup. Wrong estimates of your requirements can leave you with a totally drained battery, while an oversized system represents an extravagant investment. This guide will help you understand the different types of solar chargers and what to consider when selecting the ideal size for your boat.

What is a Solar Battery Charger?

A solar battery charger simply is a system that generates electrical energy from sunlight by solar panels and stores it away in rechargeable batteries for use at a time later. The main components necessary are solar panels, a battery bank, and a charge controller.

Solar panels are made of photovoltaic cells that absorb the sun's energy and then turn it into DC electricity. The more the panels are exposed to sunlight, the more electricity they produce. A battery bank is an energetically stored collection of deep-cycle batteries used to store the electricity generated by these solar panels. Since the deep cycle has the feature of repeated recharging and discharging, they are well adapted to be used in solar energy systems. A very important component functions in such a way that it regulates the flow of electricity from the solar panel to the batteries. The charge controller assures that the batteries remain free of any overcharge or overdischarge condition at their terminals that could spoil them and reduce their lifetime. The solar panels generate electricity when in the presence of solar. The generated energy is passed to the charge controller. It checks the battery charge level, and if not full, it sends the electricity to the batteries. When the batteries are full, the charge controller disconnects the flow of electricity to prevent overcharging the batteries.

Types of Solar Charging for Boats

There are three main types of solar charging systems suitable for boats, each designed to meet different power needs and usage patterns.

Trickle Solar Charging

Trickle solar charging systems are ideal for low-power electric boats that aren't frequently used. These compact and lightweight setups use smaller solar panels to slowly recharge your boat's battery over an extended period. Trickle chargers are a cost-effective solution for occasional boaters who don't require high power output but want to maintain their battery's charge level.

Light-Use Solar Charging

Light-use solar chargers are perfect for powering small electronics like phones, tablets, cameras, and other gadgets while on the water. These systems typically feature portable solar panels with modest wattage ratings, allowing you to charge devices directly or top up a power bank for later use. Their compact size and portability make them a convenient choice for day trips or short excursions.

Heavy Power-Use Solar Charging

For luxury yachts, houseboats, or frequently used boats with high power demands, heavy power-use solar charging systems are the way to go. These robust setups incorporate high-capacity solar panels and large power stations or solar generators to provide ample electricity for running appliances, entertainment systems, and other energy-intensive equipment. Heavy power-use systems can generate and store enough energy to keep your boat fully powered without relying on noisy generators or draining your main battery.

Trickle solar charging is ideal for low-power electric boats that are not frequently used. These systems are designed to slowly charge your boat's battery over an extended period, providing just enough power to maintain the battery and prevent it from draining completely.

Trickle solar chargers typically consist of a small solar panel, often ranging from 5 to 20 watts, and a basic charge controller. The solar panel converts sunlight into electrical energy, which is then regulated by the charge controller to safely charge the battery without overcharging it.

These systems are lightweight, compact, and relatively inexpensive, making them a convenient choice for small boats or those used occasionally. However, it's important to note that trickle solar chargers are not suitable for powering electrical appliances or providing significant amounts of energy. Their primary purpose is to maintain the battery's charge level during periods of inactivity or storage.

When selecting a trickle solar charger, consider the size of your boat's battery and the amount of sunlight exposure it will receive. Larger batteries may require a slightly higher wattage solar panel to ensure adequate charging. Additionally, if your boat is stored in a shaded area, you may need to adjust the panel's positioning or opt for a more powerful system to compensate for the reduced sunlight exposure.

For boaters looking to power small electronics like phones, tablets, and cameras, a lightweight and compact solar charger is an ideal solution. These portable solar panels are designed to be easily transported and set up, providing a reliable source of power while on the water.

Light-use solar chargers typically range from 10 to 50 watts, with panel sizes varying from the size of a tablet to a small briefcase. Despite their compact size, these chargers can efficiently convert sunlight into electricity, making them perfect for keeping your devices charged and ready for use.

One of the key advantages of light-use solar chargers is their portability. Many models fold up into a compact shape, making them easy to store and transport. Some even come with built-in kickstands or mounting options, allowing you to position the panels for optimal sun exposure while on your boat.

When choosing a light-use solar charger, consider the output voltage and amperage, as well as the number of USB ports or other charging options. Look for panels with high-efficiency solar cells and durable construction to withstand the marine environment. Additionally, some models come with built-in batteries or power banks, providing a convenient way to store energy for later use.

With a light-use solar charger on board, you can keep your essential electronics powered up without relying on your boat's main battery or noisy generators. This not only adds convenience but also contributes to a more sustainable and eco-friendly boating experience.

For boaters with high power needs, such as those with luxury yachts equipped with TVs, coffee makers, and other energy-intensive appliances, heavy power-use solar charging systems are the ideal solution. These systems utilize solar generators capable of delivering substantial amounts of electricity without the noise and emissions associated with traditional generators.

At the heart of a heavy power-use solar charging system is a high-capacity power station or solar generator. These units typically feature large lithium-ion battery packs with capacities ranging from 1,000 to 3,000 watt-hours or more. This stored energy can then be converted into AC power, providing a steady supply of electricity for your boat's appliances and electronics.

To keep these power stations charged, they are paired with multiple high-efficiency solar panels. These panels are designed to capture as much of the sun's energy as possible, often boasting conversion rates of 20% or higher. By connecting several panels in an array, a significant amount of power can be generated, even on partly cloudy days.

One of the key advantages of heavy power-use solar charging systems is their ability to deliver sustained high power output. Many solar generators are capable of producing up to 2,000 watts or more of continuous AC power, rivaling the output of a traditional gasoline generator. This level of power ensures that even energy-hungry appliances can be run without issue, allowing you to enjoy all the comforts of home while out on the water.

Key Components of a Boat Solar Charger

When setting up a solar battery charger system for your boat, there are four key components you'll need:

Solar Panels

The solar panels are the heart of the system, converting the sun's energy into electricity to charge your batteries or power devices directly. Look for solar panels with high efficiency ratings, as this will determine how much power they can generate from the available sunlight. Monocrystalline panels tend to be more efficient than polycrystalline, but also more expensive. Make sure the panels you choose are designed for marine use and can withstand exposure to salt water.

Power Station

A power station , or solar generator, acts as a battery pack to store the electricity generated by your solar panels. This allows you to have power available even when the sun isn't shining. Capacity is an important consideration - the higher the capacity, the more appliances and devices you'll be able to run. Also look at the AC and DC output ratings to ensure compatibility with your boat's power needs.

Proper wiring is critical for safely connecting the solar panels to the power station and any devices or batteries you want to charge. Use marine-grade wiring rated for outdoor use and sized appropriately for the expected electrical load. Consider factors like cable length and include components like fuse blocks to protect against shorts or overloads.

Charge Controller

A charge controller manages the flow of electricity from the solar panels to your batteries, preventing overcharging which can damage the batteries over time. Look for MPPT (Maximum Power Point Tracking) controllers which are more efficient than simple PWM versions. Make sure to match your controller with the voltage of your battery bank and solar array.

With the right combination of high-quality components sized for your specific boating needs, a solar charger system can keep your batteries topped up and provide reliable power while out on the water.

Choosing the Right Solar Panels

Selecting the right solar panels is crucial for ensuring your solar battery charger system functions efficiently on your boat. When it comes to solar panels, two key factors to consider are conversion efficiency and wattage output.

High conversion efficiency is essential as it determines how much of the sun's energy can be transformed into usable electricity. Look for solar panels with efficiency ratings of 20% or higher, as this will maximize the amount of power you can generate from a limited surface area on your boat. Top-tier solar panels like monocrystalline options can achieve efficiencies upwards of 23%, making them an excellent choice for marine applications.

The wattage output of your solar panels will dictate how much power your system can produce. This is directly tied to the size and number of panels you install. Larger panels with higher wattage ratings will generate more electricity, but they also take up more space on your boat. Assess your power needs and available deck space to determine the appropriate wattage for your setup. A common range for boat solar panels is 100 to 400 watts per panel.

In addition to efficiency and wattage, consider factors like durability, weatherproofing, and portability when selecting solar panels for your boat. Marine-grade panels designed to withstand harsh conditions and saltwater exposure are ideal. Flexible, lightweight options can also be advantageous for easy installation and portability between vessels.

Selecting a Power Station

The power station is a crucial component of your boat's solar battery charger system, as it stores the energy generated by the solar panels and provides an efficient output for powering your electrical devices. When choosing a power station, consider the energy storage capacity and output needs to ensure it can handle your boating activities.

Energy storage capacity is measured in watt-hours (Wh) and determines how much power the station can hold. A higher capacity means you can run more devices for longer periods without recharging. For light use, such as charging phones and tablets, a lower capacity of around 200-500Wh may suffice. However, if you plan to power larger appliances like TVs, coffee makers, or even a small refrigerator, you'll need a higher capacity power station, typically ranging from 1000Wh to 2000Wh or more.

The output wattage is another important factor, as it determines the power the station can deliver to your devices. A higher output wattage allows you to run more power-hungry appliances simultaneously. Most power stations offer output wattages between 200W and 2400W, with higher-end models capable of delivering up to 4000W or more.

Portability is also a consideration, especially for smaller boats or kayaks. Look for compact and lightweight power stations that are easy to transport and store. Many models come with carrying handles or wheels for added convenience.

Remember to choose a power station compatible with your solar panels and other components, ensuring efficient energy transfer and safe operation. Reputable brand like Growatt offer a wide range of power stations suitable for various boating needs.

Wiring a Boat Solar System

Proper wiring is crucial for efficiently connecting the solar panels, charge controller, and battery bank in a boat solar system. The gauge or thickness of the wires used will determine how much electrical current can flow through them without significant power loss or risk of overheating.

When selecting wire gauge, consider the distance the wires will run and the maximum current they will carry. Longer runs and higher currents require thicker wires to minimize voltage drop. For example, a common setup uses 10 AWG wire for shorter runs from the solar panels to the charge controller, and 6 AWG wire for longer runs between the charge controller and batteries.

All wiring used in a marine environment should be outdoor-rated and UV-resistant to withstand the harsh elements. Tinned marine-grade wire is ideal as it resists corrosion from salt water and moisture. Solid or stranded wire can be used, but stranded is more flexible for routing through tight spaces.

A typical wiring diagram has the solar panels wired in series using MC4 connectors, which feed into the charge controller. From the controller, heavy gauge wires run to the battery bank, with a fuse or circuit breaker inline for safety. The entire system should be properly grounded, and all connections must be waterproof and secure to prevent hazards.

Using a Charge Controller

A charge controller is a crucial component in a solar battery charger system for boats. Its primary function is to regulate the power flowing from the solar panels to the batteries, preventing overcharging and potentially damaging the batteries.

When the batteries are fully charged, the charge controller stops or reduces the flow of electricity from the solar panels. This helps extend the lifespan of the batteries and ensures they are not subjected to excessive charging, which can lead to overheating, gas buildup, and potential explosions.

Charge controllers also play a vital role in ensuring compatibility between the various components of the solar system. They match the voltage and current requirements of the solar panels, batteries, and any other connected devices. This compatibility is essential for efficient energy transfer and optimal system performance.

When selecting a charge controller, it's important to consider factors such as the maximum input voltage from the solar panels, the battery voltage, and the maximum charging current required. Additionally, charge controllers come with different features like temperature compensation, load control, and monitoring capabilities, which can enhance the overall functionality and efficiency of the system.

By incorporating a charge controller into your boat's solar battery charger setup, you not only protect your investment but also ensure a safe and reliable flow of power, maximizing the potential of your solar energy system while on the water.

Benefits of Solar for Boaters

Solar battery chargers offer several key advantages for boaters looking to power their electronics and appliances on the water. Firstly, solar energy is a completely renewable resource, harnessing the power of the sun's rays to generate electricity. This means you can keep your batteries charged without consuming any fossil fuels, making solar an environmentally-friendly choice.

Another major benefit is that solar charging systems operate silently. Unlike noisy generators, there are no moving parts or combustion processes involved. This allows you to enjoy the peace and tranquility of being on the water without disruptive engine noise.

Solar battery chargers also require very little maintenance compared to traditional charging methods. There are no fuel filters to replace or oil to change. As long as the solar panels are kept clean and free of debris, the system will continue to function efficiently with minimal effort.

Perhaps the biggest draw for many boaters is the increased comfort and convenience that solar power provides. With a properly sized solar setup, you can run lights, electronics, small appliances and more without worrying about draining your boat's primary battery bank. This allows you to extend your time on the water and enjoy amenities like you would at home, all powered by clean, quiet solar energy.

Cost Savings with Solar

One of the primary benefits of installing a solar battery charger on your boat is the potential for significant cost savings over time. By harnessing the free and renewable energy from the sun, you can drastically reduce or even eliminate your reliance on traditional fuel sources or shore power hookups.

For boats that primarily rely on gasoline or diesel generators for electricity, the fuel costs can quickly add up, especially during extended trips or periods of heavy usage. A solar battery charger system can provide a clean and cost-effective alternative, allowing you to power your boat's electrical systems without the need for fuel. Even if you only use solar power as a supplemental source, the savings on fuel can be substantial over the course of a boating season.

Similarly, for boats that typically rely on shore power when docked, the costs of marina fees and electricity hookups can also be significant. With a solar battery charger, you can potentially reduce or eliminate these costs, as your boat's batteries can be recharged directly from the sun while docked or anchored.

While the initial investment in a solar battery charger system can be considerable, depending on the size and components required, the long-term cost savings can often offset this expense within a few years. Many boat owners find that the system pays for itself through reduced fuel and electricity costs, making it a wise investment for both financial and environmental reasons.

It's important to note that the payback period for a solar battery charger system can vary depending on factors such as your boat's energy consumption, the amount of sunlight available in your boating area, and the efficiency of the components you choose. However, with proper planning and system sizing, most boat owners can expect to recoup their investment within a reasonable timeframe, typically ranging from 3 to 7 years.

Sizing Your Solar Battery Charger System

Properly sizing your solar battery charger system is crucial to ensure it meets your boat's energy needs. The first step is calculating your power requirements by listing all the electrical devices and appliances you'll be running and their respective wattages. Don't forget to account for the operating time of each device.

For example, a TV drawing 150 watts used for 4 hours per day would require 600 watt-hours (150W x 4 hours). Make a comprehensive list, adding up the watt-hours to determine your total daily energy needs.

Next, you'll need to match your energy needs to the components of your solar system. The solar panels should have enough capacity to generate the required watt-hours, factoring in real-world conditions like cloudy days. As a rule of thumb, look for panels rated at least 25% higher than your calculated needs.

The power station or battery bank must have sufficient capacity to store the energy generated by the solar panels. Its watt-hour rating should exceed your daily load to allow for energy reserves. Most systems work best with 2-3 days' worth of battery storage.

Finally, ensure the charge controller is compatible with both your solar panels and battery bank, able to handle the maximum voltage and current. Oversizing the controller slightly provides a buffer for future expansion.

Taking the time to properly calculate your sizing needs upfront leads to a well-matched, efficient solar battery charging system tailored to your boat's unique power demands.

Installation and Safety

Proper installation of a solar battery charger system on your boat is crucial for ensuring optimal performance and safety. The marine environment presents unique challenges, such as exposure to saltwater, moisture, and potential corrosion, which must be addressed during the installation process.

When installing solar panels, it's essential to choose a location that maximizes sun exposure while considering the boat's stability and weight distribution. Proper mounting techniques, including the use of marine-grade hardware and sealants, are necessary to withstand the harsh conditions at sea. Additionally, solar panels should be positioned to avoid shading from the boat's superstructure or other obstructions.

Wiring plays a vital role in the solar charging system, and it's essential to use marine-grade cables designed to withstand the elements. Proper cable sizing is crucial to minimize voltage drop and ensure efficient power transfer. All connections should be waterproofed and secured to prevent chafing or damage from the boat's movement.

The power station and charge controller should be installed in a dry, well-ventilated area, protected from direct exposure to the elements. Proper grounding and fusing are essential for safe operation and to prevent electrical hazards.

Safety should be a top priority when working with electrical systems on a boat. Always follow the manufacturer's instructions and consult with a professional if you're unsure about any aspect of the installation. Wear appropriate personal protective equipment, such as gloves and safety glasses, and exercise caution when handling batteries and electrical components.

It's also essential to consider the potential for electrical interference with other onboard systems, such as navigation equipment or radios. Proper shielding and grounding techniques may be necessary to minimize interference and ensure the safe operation of all systems.

Regular maintenance and inspection of the solar charging system are crucial to ensure its continued safe operation. Check for any signs of wear, corrosion, or damage, and address any issues promptly to prevent potential hazards or system failures.

Maintaining Your Solar Battery Charger System

Proper maintenance is key to ensuring your boat's solar battery charger system operates efficiently and has a long lifespan. Here are some important maintenance tips:

Cleaning Solar Panels

Over time, dirt, bird droppings, and other debris can accumulate on the solar panels, reducing their ability to absorb sunlight and generate power. Clean the panels regularly with a soft brush and mild soap solution to remove any buildup. Avoid using harsh chemicals or abrasives that could damage the panel surface.

Battery Maintenance

The battery bank is the heart of your solar charging system, storing the energy generated by the solar panels. Check the battery's water levels periodically (if using lead-acid batteries) and top up with distilled water if needed. Inspect the battery terminals for corrosion and clean them if necessary. Consider investing in a battery monitor to track the battery's state of charge and overall health.

System Checks

Regularly inspect the entire solar charging system for any signs of damage, loose connections, or wear and tear. Check the wiring for any fraying or damage, and ensure all connections are tight and secure. Inspect the charge controller for proper operation and verify that it's correctly regulating the flow of power from the solar panels to the battery bank.

Seasonal Maintenance

Depending on your location and boating season, you may need to take additional steps to prepare your solar charging system for winter or extended periods of non-use. This could include disconnecting the batteries, covering the solar panels, or storing components in a dry, protected area.

By following these maintenance practices, you can help ensure your boat's solar battery charger system operates reliably and efficiently, providing you with clean, renewable power for years to come.

Solar battery chargers are great for boaters who need an able, eco-friendly, and cost-effective power solution. With solar power harnessed from the sun, you derive pleasure from the great convenience energy source that is free for recharging your boat's electronics, appliances, and systems, all without the noise from a generator or worry over the cost of fuel. Selecting the right size of solar charging battery is of utmost importance because the right power is crucial for the total fulfillment of the boating requirement. Whether you need part-time trickle charges or heavy-duty solutions for luxury yachts, solar charging solutions are customized for your needs. Proper sizing would not only provide the proper power but would not also waste space and weight on your vessel. As the world shifts towards the adoption of sustainable sources of energy, the future of solar boating seems very bright. Solar panel potential and advanced battery technology will hold much in the way of promise for sailing boat owners in the near future. Not only is it environmentally friendly, but it also raises the level of your boating experience way higher, allowing you to cruise silently, cleanly, and independently.

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Ultra-thin solar 'coating' can turn phone cases and EVs into mini power generators

Cheap and flexible perovskite solar cells could revolutionize solar power, making it easier than ever to power the world with sunlight.

Researchers have produced the world's first flexible "solar panel" that is thin enough to coat on other objects so they can double as a portable source of energy.

A breakthrough approach allowed scientists to create solar cells 150 times thinner than existing silicon-based panels, without sacrificing any of their energy-generating capabilities. These panels could eventually be applied to almost any object as an easily-printed layer, such as cars or smartphone cases, enabling anyone to charge on the go and negating the need for large solar farms, the scientists said.

The material the researchers made is just over one micron thick (0.001 mm). Japan's National Institute of Advanced Industrial Science and Technology (AIST) has certified this invention ahead of the publication of a scientific study later this year.

In the study, the University of Oxford researchers made a new photovoltaic material (capable of turning sunlight into energy) from perovskite structures. These crystal formations are synthetic versions of naturally occurring calcium titanium oxide that can be made relatively cheaply in labs or factories. Like silicon, the most common material used for solar cells, perovskite produces an electric charge in the presence of sunlight.

Scientists around the world have been racing to unlock the benefits of perovskites since the late 2000s. Sometimes described as the '"holy grail" of solar power , they theoretically allow for flexible, lightweight solar panels to be manufactured far more cheaply than current-generation silicon cells.

While perovskites hold immense potential, scientists have struggled to synthesize them to make them last beyond a few months. Perovskites are particularly prone to damage from too much moisture and can break apart after being exposed to the air via volatile chemical reactions.

Over time, researchers have found that perovskites can be kept stable in layered structures such as tandem cells, which combine perovskites and silicon cells. The team at Oxford opted for a "multi-junction" approach, in which several photosensitive layers corresponding to different wavelengths of light are combined to improve the photosensitivity of the overall solar material.

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The resulting thin layer of solar film was 27% efficient when converting sunlight into energy — compared with the approximate 22% efficiency of silicon panels on the market today. The researchers noted that they have dramatically improved their results with perovskites in the past five years, having started at 6% efficiency.

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"We can envisage perovskite coatings being applied to broader types of surface to generate cheap solar power, such as the roof of cars and buildings and even the backs of mobile phones," said Junke Wang , professor of physics at Oxford University, in a statement . "If more solar energy can be generated in this way, we can foresee less need in the longer term to use silicon panels or build more and more solar farms."

In time, the researchers believe that perovskites could allow solar panels to exceed 45% efficiency — the upper limit based on current approaches and our understanding of physics. This will allow them to generate far more power for every square inch of solar material in operation, while also generating power in very low lighting.

Rory Bathgate is a freelance writer for Live Science and Features and Multimedia Editor at ITPro, overseeing all in-depth content and case studies. Outside of his work for ITPro, Rory is keenly interested in how the tech world intersects with our fight against climate change. This encompasses a focus on the energy transition, particularly renewable energy generation and grid storage as well as advances in electric vehicles and the rapid growth of the electrification market. In his free time, Rory enjoys photography, video editing and science fiction. He joined ITPro in 2022 as a graduate, after completing an MA (Hons) in Eighteenth-Century Studies at King’s College London. You can contact Rory at [email protected].

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Researchers use ‘holy grail’ of solar tech to develop new flexible panels

By Jack Aylmer (Energy Correspondent), Ian Kennedy (Video Editor)

A team of researchers from Oxford University has produced the world’s first flexible solar devices. They are thin enough to be coated over various objects, turning them into portable power sources. While flexible solar panels have been available on the market for some time, these new panels are distinguished by their ultra-thin design, measuring just over one micron thick.

The panels are made using a material called perovskite, which has been hailed by some in the industry as the “ holy grail ” of solar power. Perovskite’s appeal lies in its potential to create flexible, lightweight solar panels at a much cheaper cost than current models.

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“We can envisage perovskite coatings being applied to broader types of surface to generate cheap solar power, such as the roof of cars and buildings and even the backs of mobile phones,” Junke Wang, professor of physics at Oxford University, said in a  statement . “If more solar energy can be generated in this way, we can foresee less need in the longer term to use silicon panels or build more and more solar farms.”

However, previous attempts to use perovskite in solar panels have faced significant challenges. The material is notoriously susceptible to damage from moisture and can degrade quickly when exposed to air, which has limited its practical use in outdoor solar panels.

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The Oxford research team has overcome these challenges by developing a method to stabilize perovskite in layered structures. This innovation has resulted in a solar device that is not only durable but also more efficient, with a 27% efficiency rate in converting sunlight into energy.

This marks an improvement over the current industry standard, which typically caps at around 22% efficiency. With continued development, researchers believe they can push the efficiency rate up to 45%.

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[JACK AYLMER]

WE’VE SEEN A NUMBER OF EFFORTS TO MAKE TECH MORE FLEXIBLE.

FROM PHONES AND SMART WATCHES TO TV SCREENS AND TOUCHSCREEN TABLETS, THERE’S BEEN A RECENT RAGE AROUND DEVICES THAT CAN BEND.

AND THAT’S NOW EXTENDING TO SOLAR PANELS AS WELL.

RESEARCHERS FROM OXFORD ARE PRODUCING THE WORLD’S FIRST FLEXIBLE SOLAR ENERGY DEVICES THAT ARE THIN ENOUGH TO COAT OVER OTHER OBJECTS SO THEY CAN DOUBLE AS A PORTABLE SOURCE OF POWER.

WE’VE SEEN SOLAR PANELS THAT BEND ON THE MARKET BEFORE NOW-

BUT THE ULTRA THIN NATURE OF THESE LATEST ONES, SAID TO BE JUST OVER ONE MICRON THICK, WILL OFFER NEW POSSIBILITIES FOR THE TECH.

THE PRODUCERS OF THESE PANELS ARE MAKING THEM WITH A MATERIAL CALLED PEROVSKITE-

SOMETIMES REFERRED TO AS THE HOLY GRAIL OF SOLAR POWER.

WHILE THIS RESOURCE OFFERS THE POTENTIAL TO BUILD FLEXIBLE, LIGHTWEIGHT SOLAR PANELS FAR MORE CHEAPLY THAN CURRENT MODELS-

PREVIOUS ATTEMPTS AT USING PEROVSKITE HAVE FAILED TO PRODUCE SOLAR PANELS THAT CAN LAST FOR MORE THAN A FEW DAYS.

THE MATERIAL IS PARTICULARLY PRONE TO DAMAGE FROM MOISTURE AND CAN BREAK APART AFTER BEING EXPOSED TO THE AIR FOR TOO LONG-

TWO THINGS THAT OUTDOOR SOLAR PANELS ABSOLUTLEY HAVE TO BE ABLE TO WITHSTAND.

HOWEVER, THE OXFORD TEAM FOUND THAT WHEN PLACED IN LAYERED STRUCTURES, THEY WERE ABLE TO STABILIZE THE PEROVSKITE FOR CONSISTENT SOLAR PANEL USE.

THE RESULTING DEVICE IS 27 PERCENT EFFICIENT AT CONVERTING SUNLIGHT INTO ENERGY-

A SLIGHT IMPROVEMENT OVER THE 22 PERCENT EFFICIENCY CEILING THAT SOLAR PANELS ON THE MARKET TODAY HAVE.

AND OVER TIME, RESEARCHERS BELIEVE THEY CAN IMPROVE ON THAT PERFORMANCE TO 45 PERCENT EFFICIENCY.

JACK AYLMER – STRAIGHT ARROW NEWS.

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BougeRV Arch 200 Watts Fiberglass Flexible Solar Panel, Portable Bendable 12 Volts 10BB Mono Cell for RV Camping Home Boat Marine Curve Surface Black

100W/39.6*23.7*0.08 in

200W/58.1*31*0.08 in

Purchase options and add-ons

Brand	BougeRV
Material	Monocrystalline Silicon
Product Dimensions	58.1"L x 30"W x 0.08"H
Item Weight	7 Pounds
Efficiency	23%

About this item

• Double Fiberglass Protect increases the impact resistance. No worry about the crack. Double glass fiber is placed on the upper and lower layers of the mono solar cell for protection, which can avoid damage to the mono solar cell to the greatest extent.
• Max To 270° Flexible. Matches more curved surfaces, allowing you to install where rigid solar panels cannot. Make full use of the limited space on the roof or even the curved part of the front of the car.
• ETFE Covering Material. Using ETFE instead of PET, will not delaminate after long-term use, so it has a longer service life. It has anti-scratch/self-cleaning/sand-proof capabilities and can resist impact and abrasion, preventing collisions and possible wear, scratches, etc. This happens frequently during transportation and maintenance activities.
• Lightweight and Easy to Carry. Ultra Lightweight-Only 7 lbs and Thin-Only 2mm. The BougeRV factory uses special lamination technology to make fiberglass flexible solar panels light and thin, leading in the market, and easy to move.
• Multiple Protective Material Insulation. Effectively reduce module temperature by -0.39%/℃, and improve output power By 6W.
• 10BB Cell Design. More Busbar, More Power. BougeRV 200W glass fiber flexible solar panel uses the high-level 10BB cell design with a 23% highest conversion rate. It makes the solar panel have a longer service life. Increase the cell receiving surface, a thinner ribbon reduces the covered area by 22%. Also, it can charge a 12V battery or a 24/48V battery by wiring several solar panels in series.
• Easy installation. There are pre-punched holes for easy installation. You can also apply glass glue for quick installation.
• Durable & User Friendly. The sturdy panel can withstand high wind (2400 Pa) and snow loads (5400 Pa) and perform excellently in low-light environments. IP67 Rated Waterproof Junction Box can isolate environmental particles and low-pressure water jets. Diodes are pre-installed in the junction box, with pre-attached 3ft Cables. Pre-drilled holes on the back of the panel allow you to quickly install solar panels without using heavy tools.
• 1-on-1 Solar Solution by BougeRV Tech Support & Warm Warranty. BougeRV promises a 5 years product warranty a 25-year power warranty and lifetime warm-hearted service for you. Please get in touch with us whenever you have any problems with the BougeRV solar panel. We will provide you with a professional guide to building a solar system.

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• Hit test video
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HIT TEST VIDEO

Solar system.

Installation Method

Specific Parameters--Single 200W Fiberglass Flexible Solar Panel

Maximum Power (W)	200±5% W
Open Circuit Voltage Voc (V)	20.1±5% V
Max Power Voltage Vmp (V)	17.1±5% V
Max Power Current Imp (A)	11.7±5% A
Short Circuit Current Isc (A)	12.28±3% A
Solar Cells Efficiency	23%

Product Diameter (IN)	58.1 x 31 x 0.08 inches
Net Weight (kg / lb)	3.2 kg / 7 lbs
Application Class	Class A
Max Static Load (front)	2400 Pa
Max Static Load (back)	2400pa
Series Fuse Rating	10A

Pre-drilled holes on the back of the panel allow you to easily install them without any heavy tools.

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	24V High Voltage	270° Flexible	360° Flexible, Light & Thin	12V/24V	Self-Heating	Backlit Display	Pure Sine Wave
	31.1±5% V	19.8±5% V	25V	12V/24V	12.8V	12V/24V	DC 12V to AC 110V
	33.6 x 23.1 x 1.4 inches	39.6*23.7*0.08 inches	25.4 x 78.7 x 0.06 inches	10.02 x 8.25 x 4.91 inches	11.4 x 8.26 x 7.67 inches	6.6 x 4.5 x 2.1 inches	12.4*8.07*3.54 inches
	12.3 lbs	3.8lb	6.68 lbs	4.93 lbs	27 lbs	0.9 lbs	11.46 lbs
	✔	✔	✔	✔	✔	✔	✔

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Product guides and documents, product information, technical details.

Brand	‎BougeRV
Material	‎Monocrystalline Silicon
Product Dimensions	‎58.1"L x 30"W x 0.08"H
Item Weight	‎7 Pounds
Efficiency	‎23%
Connector Type	‎SOLAR CONNECTOR
Included Components	‎Light
AC Adapter Current	‎11.7 Amps
Maximum Voltage	‎17.1 Volts
Maximum Power	‎200 Watts
Manufacturer	‎BougeRV
Part Number	‎ISE230
Item Weight	‎7 pounds
Country of Origin	‎Malaysia
Item model number	‎ISE230
Size	‎200W/58.1*31*0.08 in
Color	‎Black
Style	‎Modern
Batteries Included?	‎No
Batteries Required?	‎No

Additional Information

ASIN	B0CP29YQCK
Customer Reviews	4.5 out of 5 stars
Best Sellers Rank	#41,831 in Patio, Lawn & Garden ( ) #209 in
Date First Available	November 27, 2023

Warranty & Support

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	Arch 200 Watts Fiberglass Flexible Solar Panel, Portable Bendable 12 Volts 10BB Mono Cell for RV Camping Home Boat Marine Curve Surface Black	100W Flexible Solar Panel Portable Bendable 12 Volts 10BB Mono Cell for Uneven Surfaces Marine Camping Home Boat RV Surface Black	Arch 200 Watts Fiberglass Flexible Solar Panel, Portable Bendable 12 Volts 10BB Mono Cell for RV Camping Home Boat Marine Curve Surface Black (2PCS 100 Watt)	24V N-Type 16BB 200W Bifacial Solar Panel, 24V 200 Watt Solar Panel, for RV Camping Boat Marine Log Cabin Roof, Charing Golf Cart Lithium Battery, Black Frame (1PCS)	400 Watts CIGS Thin-Film Flexible Solar Panel, The Most Flexible Solar Panel with Pre-Punched Holes for Easy Installation (2PCS 200W Pre-Punched)	2PCS 100W 12V Flexible Solar Panel 9BB Monocrystalline Cell 12 Volt Semi-Flexible for Marine RV Trailer Boat Cabin Van Car Uneven Surfaces 12V 24V Battery Charge
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• 5 star 4 star 3 star 2 star 1 star 4 star 76% 14% 0% 5% 5% 14%
• 5 star 4 star 3 star 2 star 1 star 3 star 76% 14% 0% 5% 5% 0%
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Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.

To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.

Customers say

Customers like the quality, ease of installation, and performance of the solar panel. For example, they mention that it works great, is easy to install, and works as advertised.

AI-generated from the text of customer reviews

Customers are satisfied with the performance of the solar panel. They mention that it works great and as advertised.

"Bought for a replacement on my 2022 Cardinal 5th wheel RV. It works great , Easy install, standard plug in and ready to go...." Read more

"... Works perfectly for our application , got up to 14 amps on a sunny day in Utah during midday." Read more

"...This solar panel works as advertised ! I will be keeping these, installing them on my sailboat, and probably ordering more...." Read more

"... Works perfect ." Read more

Customers are satisfied with the quality of the solar panel. They mention that it is of good quality, lightweight, and flexible.

"...It works great, Easy install, standard plug in and ready to go. Great product at a very good price" Read more

"Is a good quality , lightweight weight, somewhat flexible. Works perfectly for our application, got up to 14 amps on a sunny day in Utah during midday." Read more

"I was impressed with the build quality of this panel. Got it to mount on my off road pickup to charge my power station...." Read more

" Great product ..." Read more

Customers find the installation process of the solar panel to be easy. They mention that it works great, is easy to install, and does not require any holes in the roof of their RV.

"...It works great, Easy install , standard plug in and ready to go. Great product at a very good price" Read more

" Easy to install no holes in roof of rv" Read more

" Easy to install - works great..." Read more

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Simply Unbeatable | More Power in Less Space

SunPower® 100W E-flex solar panel - spec sheet

SunPower® flexible panels deliver the highest power output in their product class. SunPower® panels are constructed with top-grade, lightweight polymer materials, allowing for easy transport, installation and panel flexing up to 30 degrees.

How much power will I get? With a 12V system an estimated daily yield for a single 100W panel is potentially around 32-34 amp hours.

Which MPPT controller do I need? With a 12V system pair a single 100W panel with a Victron 75|10 , pair 2x100W panels with a Victron 100|20 , pair 3x100W panels with a Victron 100|30 .

Federal Tax Credit Net Price = File & receive the 30% Federal Tax Credit until 2032 more details on our Solar Tax Credits page 

Have a 24V/48V system? Need more help sizing your MPPT charge controller? Have other questions? Visit our FAQ page or contact us , we're happy to help.

Product Detail

SunPower® 100W E-flex solar panel

Dimensions: 45.9"(L) x 21.9"(W) x 0.1"(W) (0.8" including J-Box)

Weight: 4.4lbs - Lightweight, Portable & Easy to Stow

Rated Voltage (Vmpp) 17.1V | Rated Current (Impp) 5.9A - Powerful

Flexible up to 30 degrees - Suitable for Irregular Surfaces

32 high efficiency (23%) monocrystalline Maxeon™ Gen II prime solar cells - More Power in Less Space

Premium cosmetic quality

Junction box with by-pass diode has IP67 protection- Robust Design, Water & Dust Proof!

17.7" long cables (12AWG) with  PV4-S Connectors (MC4 compatible) - Reliable & Safe with IP68 Protection

6 x 316 Stainless steel grommets (5/16" I.D.) -   Diverse Installation Options

5-Year power & 2-Year product warranty (no salt water exclusion) - Backed by SunPower

Solar cells made in the Philippines.  

Solar panel assembled in France.

Individually packaged & protected for shipping. Includes safety & installation guide

Manufacturing Certificates: ISO9001, ROHS

Spec sheet ( pdf )

Marine flyer ( pdf )

Installation guide ( pdf ) Rev F

Shipping Info

Domestic Shipping

Free standard shipping currently 5-7 days on all of our SunPower® flexible solar panels in the USA (extra fee to Alaska & Hawaii). All other US territories (including Puerto Rico) not included. All orders are processed within 24-48hrs and you will be provided with tracking number(s) when available.  ​All SunPower® E-Flex panels are individually packaged and orders are fulfilled from our stock of SunPower® flexible panels in the USA.

International Shipping 

Sun Powered Yachts only offers domestic shipping.  We recommend international shipping using a package forwarding company based in the USA.  We will ship your order to them and they will then consolidate your order and ship internationally to over 200 countries & territories. 

One popular company is called MyUS.com and it is very easy to set up an account with them and get shipping estimates.  Alternatively please fill out the form on the shipping policy page and we will email you with more details on their international shipping estimate.  

Note: International shipping is provided by a third party and Sun Powered Yachts, LLC is not responsible for any insurance costs, delays or customs charges/fees for delivery outside of the USA.  (Tip: If you are a 'Yacht in Transit' please indicate this and the name of your yacht in the shipping address you provide to the package forwarding company)

Boxed 100W panel dimensions: 53" (L) x 24" (W) x 2" (H)

Boxed 100W panel weight: 7.5lb

Return Policy

We are confident that you will be happy with your SunPower® E-Flex panels. However, if you are not completely satisfied items can be returned within 30 days of receipt of purchase.  

Please contact us to generate a Return Merchandise Authorization (RMA) for you to print and include in the package before shipping: [email protected]

Items must be in good condition and still in the original packaging & customer is responsible for return shipping costs.

If you are seeking a warranty claim from SunPower you can contact them directly: [email protected] and include your panel serial number (found on back of panel)  Otherwise contact us and we will be happy to assist. 

No Salt Water Exclusion & Backed by SunPower

5-Year Power Warranty - SunPower also warrants that the power of the E-Flex PV Modules will be at least 80% of the Minimum Peak Power rating for 5 years.

2-Year Product Warranty - SunPower warrants that for 2 years beginning on the Warranty Start Date its E-Flex PV Modules shall be free from defects in materials and workmanship under normal application, installation, use and service conditions.

If you are seeking a warranty claim from SunPower you can contact them directly: [email protected] and include your panel serial number (found on back of panel)  Otherwise contact us and we will be happy to assist. 

(For full details download the E-Flex warranty pdf here )

SPR-E-FLEX-100 ( pdf )

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Maxeon® MAX6-475W-COM

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1x 470 Watt bundle

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Testimonials.

I can now cruise in comfort 8 months of the year !

I was satisfied with the solar panel system I purchased from Sun Powered Yachts. Lyall provided great advice and the systems included cabling, connectors, controllers, and circuit breakers plus guidance for the DIY installer.  I also added 12V air conditioning, new lithium and a 12V watermaker.

I can confidently say the installed systems are up to the task and I can now cruise in comfort eight months of the year.

Click here to read the full news post by Keith

Beneteau Oceanis 373

Our gen run time has been cut nearly 50%

The solar is working out great! Yesterday in the Exumas I saw 39A @24vdc from the 3x410W panels.  Each panel was around 400 Watts which really exceeded my expectations.  Our gen run time has been cut nearly 50% and the peace of mind leaving the boat at anchor for day trips is priceless.  Thanks again for all your help with our system.

Nordhavn 55

On sunny days I can make a lot of ice!

I've done two solar projects with Lyall at Sun Powered Yachts on the same boat. The first was with 2x flexible panels mounted on the Bimini with a total of about 340Watts.  The second was 3x 410Watt fixed frame panels, with all the charge controllers, circuit breakers and accessories needed. Lyall helped me design and pick all the parts and pieces to get that all working.

2010 Catalina 445

So now I generally

Don't bother hooking, up to shore power.

Thanks for all the help in planning my solar project for my boat. The two 170W flexible panels fit well on my Bimini and now I generally don't bother hooking up to shore power.  Although I haven’t had any long trips since my installation I have done a few day trips. And even with fridge, radio, plotters, autopilot and occasional radar it seems that these panels are keeping up with my usage. I did add some stiffener material to the back of the panels and attached the panels with zippers and they have survived a few 30 knot days and one night with winds gusting well over 55 knots. No damage at all and no signs of flexing problems. 

The advice and service has been great.   Thanks again.

Jeanneau Sun Odyssey 469

It made my project

Work, thank you.

Lyall and Katie are so knowledgeable.  I tried this project with a lesser quality panel and the project failed because it wasn't efficient enough. The SunPower® Maxeon Gen III cells are compact and simply kick out more Volts/Current than all the others on the market today.   And by using the SunPower® panel, everything was smooth and efficient.  I love my new 170W 29V 5.83A panel!!  It made my project work.   Thanks Lyall for all your knowledge in making this work.   

E-recumbent trike & trailer

Terrific customer service, patient, always responsive

The process of researching a solar solution for my Beneteau 41 was simplified & clearly understood once I discovered Sun Powered Yachts.  Terrific customer service, patient, always responsive with guidance and products that just work. Being a novice at setting up a solar system, I had many questions along the way, and the team at Sun Powered Yachts were always there to answers my questions and provide support.

Beneteau 41

Flexible solar panels achieve record-breaking efficiency

S cientists have achieved a record-breaking level of efficiency for flexible solar panels using the so-called ‘miracle material’ perovskite .

The lightweight solar panels , developed by researchers in Australia and the UK, were able to convert 11 per cent of the Sun’s energy into electricity, making them suitable for commercial use.

Their flexibility means they can also be deployed in previously impossible ways, such as on curved roofs, awnings or even vehicles.

The international team – made up of scientists from the University of Cambridge, Monash University, the University of Sydney and the University of New South Wales – made the breakthrough using a new technique to print the solar cells on bendy rolls.

The Commonwealth Scientific and Industrial Research Organisation (CSIRO), an Australian government agency who led the research project, said both the scale and the efficiency achieved during the tests made it a “real game changer” for the renewable energy industry.

“The cells are printed using a roll-to-roll technique similar to newspaper printing, which allows for continuous, large-scale production,” the organisation said in a statement.

“The dramatic increase in efficiency has paved the way for commercially-viable perovskite solar cell manufacture at scale.”

Perovskite has been widely hailed for its potential to vastly increase the efficiency of solar panels, offering a theoretical limit of 43 per cent when combined with silicon compared to just 29 per cent for conventional silicon (PV) solar cells.

Last November, researchers in China broke the efficiency record for solar panel electricity generation using a silicon-perovskite tandem solar cell, reaching 33.9 per cent efficiency under lab conditions.

Despite being a long way off this record, the 11 per cent achieved in the latest tests is far greater than the efficiency levels of around one or two per cent that printed flexible solar panels currently offer.

The next challenge is to scale them up for mass production, with the researchers saying they could be used in everything from disaster relief to space exploration.

CSIRO said it is currently looking to collaborate with industry partners in order to further develop and commercialise the next-generation solar panels.

The new solar panels were detailed in a study , titled ‘The first demonstration of entirely roll-to-roll fabricated perovskite solar cell modules under ambient room conditions’, published in the journal Nature Communications .

The Independent is the world’s most free-thinking news brand, providing global news, commentary and analysis for the independently-minded. We have grown a huge, global readership of independently minded individuals, who value our trusted voice and commitment to positive change. Our mission, making change happen, has never been as important as it is today.