Preventing power loss: Used for car roof, charging the car battery at any time, preventing the car battery from losing power, solving the situation that the car can't fire due to battery loss caused by long time  parking vehicles.Car electrical appliances: when using car electrical appliances do not lose the original power of the car battery (car stereo, navigator, car recorder, exhaust fan, car blower, car refrigerator, cell phone, MP3,etc.).Experimental power generation:DIY experiments for schools or personal research on solar photovoltaic power generation projects.RV electricity:RV installation of solar energy systems, travel around the world, charging in the RV to drive induction cookers, water heaters, rice cookers, car air conditioners, TVs, stereos, etc, to solve the RV's demand for electricity.