ECO-WORTHY 40 Watts 12 Volts Semi Flexible Monocrystalline Solar Panel for Battery Charging Highly efficient Mono solar cells. Completely weatherproof. Slimline and flexible up to 3% (=3cm over 1m) across their length. Can be conveniently placed on curved solid surfaces. Lightweight and thin, contain no glass or aluminum. Built in blocking diode to prevent battery discharge at night. High-efficiency silicon solar cells ensure high performance of solar modules and create maximum power output. PET sheet imported from Toyo Japan with advanced encapsulatiing material, laminated in totally automatically machine by experienced technician. The thickness only 2.5mm, easy joint to your yacht, boat or RV roof, or fixed on your caravans, motorhomes, bicycle and other vehicles for outdoor using. Bending angle up to 30 degrees. Durable with aluminum backsheet, no glass.