Schumacher SPC-7A 12 Volt Solar Charge Controller For use with 12 Volts solar panels and batteries only Provides overcharge protection to the battery and optional load connection to manage discharge of the battery Handles up to 7 ampere of array current and up to 100 watts of solar power Versatile quick-connect clips make easy connections between 12 Volts rechargeable battery, solar panel and load application Environmentally safe - no electricity needed