Keep your vehicle's 12V battery charged with this Coleman 18W Solar Battery Charger Kit. Ideal for charging the batteries of RVs, tractors, ATVs, electric fences, deer feeders, boats, and more. Maintenance-free charger is made with a sturdy aluminum frame and shatterproof tempered glass for superior durability. Amorphous solar technology allows the panel to operate in all daylight conditions, even on cloudy days. Fully weatherproof design includes built-in blocking diode to prevent reverse discharge in battery. Maximum power output: 18 watts and 1.2 amps under ideal conditions. No main power required. Includes solar panel with 8' wire, 7-amp charge controller, wire adapter, quick-connect technology, battery clamps, and mounting hardware for easy installation.