Solar monitor Power of monitor: 3-5W System voltage: DC12V Working hours: 24 hours per day Cloudy and Rainy days: 7 days Battery: 12V16AH Controller: 12V10A PV PANEL: 20W Mono/polycrystalline silicon high-conversion high-efficiency cell This is the system with the combination of the solar and your national grid, if your national grid is normal, the camera will be supplied by your national grid, if your national grid cut off, the camera will be run by the solar