The SLP080-12U-W module use uses high quality polycrystalline silicon solar cells. They make excellent trickle chargers and small motor power supplies. The 80 watt module is great for powering fans and fountain pumps, charging 12 volt batteries for telemetry, or for battery maintenance. This unit ships with 3 feet of cord, a sealed junction box, and a 10 year output warranty. A solar controller is recommended to improve charging efficiency and protect batteries.Charge Controller highly recommended to prevent back-drain when sunlight is not present.