Battery Doctor's(R) 20 Watt Solar Panel Charger Kit also allows you to charge and maintain your RV, boat, or cabin batteries using sustainable energy from the sun. Made with an aluminum frame with durable plastic edging, this solar panel charger measures 46" L x 15" W x 2" D. A 12 Volt socket cable and battery cable are also included. | WirthCo 20 Watt Solar Panel Charger Kit