The 7 Amp Charge Controller protects your 12V lead acid batteries from overcharge. This charge controller is to be used with any of the P3 12V product line and can handle up to 100 Watts of Solar Power. With the attached SAE Trailer plug the 7 Amp Solar Charge Contoller can connect directly to the solar panel and the remaining SAE Trailer plug can connect to any one of the cables in our 5 Piece Accessory Kit.