Nature Power 40060 72-Watt Mini Solar Power Farm Includes 4 18-Watt Panels 72-Watt of solar power for charging 12-volt batteries all accessories included High quality amorphous solar material will work in all light conditions even on overcast days Weatherproof for outdoor use All connections, charge controller, inverter and tilting stand included Provides up to 72-watt or 4.8-amp per hour of sunlight