Included with your purchase is one 30-Watt Solar Panel 12-Volt Battery Charger For Boat RV Back Up Off Grid. It is recommened that a charge controller is used when charging a 12 volt battery with a 30 Watt solar panel. A charge controller and cable to connect the solar panel to the charge controller are NOT included with your purchase. We do sell a Complete 30W Solar Panel kit on Amazon that includes all these items — The 30-Watt Solar Panel 12-Volt Battery Charger For Boat RV Back Up Off Grid allows you to start producing free, clean power from the sun! Perfect for keeping 12 volt batteries charged on RV’s, boats, ATV’s, cabins and any other situation where you need to keep a 12 volt battery charged up and ready for use!