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Perhaps one of the most useful innovations in solar cell technology is the emergence of flexible solar generating materials.Los Angeles-based startup Sunflare's CIGS solar cells are a stellar example, because they are supplied in a roll not too unlike wallpaper. Upon reaching their destination, the solar material can be rolled out and mounted to nearly any surface -- sometimes with little more hardware than some double-sided tape. The ultra-lightweight solar cells weigh 65 percent less than traditional solar panels and are also 10 percent more efficient, generating more energy in areas that need it most. The panels' flexible delivery make them a perfect solar solution in rural areas and for portable projects, with an affordable price as well. Sunflare estimates the energy produced by their rolled up solar cells costs as little as $1.07 per watt.

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