SolarFlats provide power to recharge, even when you're not around. Mount a SolarFlat15 to the roof of your RV or camper and continuously charge your battery everyday or charge the boat battery while you're out on the water. Whether your application is power tools, electric fences or DVD players, . SolarFlats are designed for optimum performance in any environment. They are constructed with amorphous thin film that are weatherproof and can even perform under low-light or during an overcast day. Durability is always a primary concern for solar power users. That's why the SolarFlat frame is built with a special UV inhibitor to make it less susceptible to heat damage and the solar cells are encased in shatter proof glass.