Flexible Solar Panel Guide

Are flexible solar panels a good fit for you?

Whether flexible solar panels are right for you depends on what you want to use them for. It’s important to note that flexible solar panels are not the same as thin-film solar panels, though you may hear the terms used interchangeably.

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“Thin-film solar panels have been around for a while and have mostly been used for larger utility solar projects,” said Dan Orzech, general manager of Oregon Clean Power Co-op, who has been in the solar industry for more than a dozen years. “Flexible solar panels are relatively new and so far are not commonly used for either homes or other buildings.”

If you’re installing solar panels on the roof of your house, traditional rigid solar panels are still the best choice. Most roof structures are composed of broad, flat, rectangular surfaces, where rigid solar panels work perfectly. Rigid panels are stable and efficient and last for many years.

But what about a Victorian home, with multiple arched surfaces? Could you combine flexible panels in an array with rigid panels to extend the total solar coverage area? Only if you’re willing to replace them often, because they won’t last long, according to Ocean Yuan, president and CEO of Grape Solar in Eugene, Oregon.

“On traditional solar panels, the surface is glass,” Yuan explained. “When it rains, snows or whatever, the glass, which is rigid, can sustain the impact. I have seen solar panels made 50 years ago that still work.”

“Flexible solar panels are not made of glass,” he said. “On the surface is a transparent sheet made of very thin plastic, almost like the plastic wrap you use to wrap your food. That material under direct sun, say in Arizona or Texas, could melt. It’s an unproven material to protect the solar cells beneath it.”

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Best uses for flexible solar panels

Even though flexible solar panels aren't the best choice for rooftop solar arrays, they do present some intriguing applications. And despite not wearing well, they are every bit as efficient as rigid solar panels.

“They’re made of silicon-based solar cells,” said Yuan, the CEO of Grape Solar. “That’s the same efficient technology of the traditional glass-laminated solar panels. Same solar cells. Same efficiency.”

So, what are flexible solar panels good for?

Portable applications

Flexible solar panels are very lightweight, so they may be most useful to hikers, climbers and backpackers, who can use them to keep devices charged. While rigid panels weigh between 30 and 50 pounds each, flexible solar panels can weigh as little as 5 pounds.

David of Colorado said about their portable panels: “I like how easy it is to set up the panels. Everything's portable. I could load it up in the back of the car and take it with me. I keep them charged.”

RVs and camper vans

Many do-it-yourselfers rig up solar panels on their RVs, but these panels do require maintenance. Rigid panels have a thick profile, so on a moving vehicle they suffer wind degradation. Flexible solar panels can be taken down and stored away before driving.

Yuan said he's seen RV applications at industry shows. “Companies like Winnebago or Airstream may use them in very small quantities, like on the curvy roof of an RV,” he said. He noted that these uses are still experimental.

Marine uses

Flexible solar panels can be used to power some electronics on boats, as their pliable nature allows them to fit anywhere they might receive sunlight. However, a combination of salt water and the wear and tear of being on a constantly moving vehicle might cause them to degrade even faster than usual, so you may find yourself replacing them fairly often.

Drawbacks of flexible solar panels

The main drawback of flexible solar panels is that the thin plastic covering that makes them more flexible isn't proven to truly protect the solar cells. As a result, flexible solar panels sometimes don’t withstand the elements as well as fixed solar panels, which can last longer than 20 years. Also, because they're relatively new to the solar marketplace, there aren't as many products available.

Flexible solar panels maintenance and care

Occasionally, you may need to gently clean your flexible solar panels if they’re covered in dirt or grime, as sunlight may otherwise have trouble breaking through to your panel.

Remember that your panels generate electricity, so you should only clean them when your solar power system is completely turned off. It’s also best to clean them when they’re not in direct sunlight, such as in the evening or early in the morning.

Do not use chemicals on your solar panels; instead, a gentle flow of water, such as from a garden hose, can do the trick. Use a soft cloth or sponge if necessary.

If you don’t feel comfortable cleaning the panels yourself, consider reaching out to a company that installs solar panels to see if they offer cleaning and maintenance services.

If you don’t use your flexible solar panels all the time — maybe you only use them for camping trips in your RV, for example — store them in a clean, dry place away from the elements when they’re not in use.

How much do flexible solar panels cost?

You can find flexible solar panels with outputs that range from 100 to 300 watts per hour. Expect to pay less than $200 for a 100-watt flexible solar panel. The higher the wattage, the higher the cost. A 300-watt flexible solar panel will range in price up to $1,000. The price you pay will vary depending on the panel’s efficiency, capacity, brand and durability.

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Where can I find flexible solar panels?

You can purchase flexible solar panels from online or big-box stores. This may be all you need if you’re shopping for a single flexible solar panel or a small flexible solar panel kit for your RV.

If you’re considering solar panels for your home, you should shop for traditional rigid solar panels. A rooftop solar array is an investment, so be sure to get several quotes from solar installation companies in your area. These companies can advise you on the best solar panels for your household’s needs, and they usually offer financing options.