Power Your XC Hybrid or by Harnessing Solar Energy. Hunter's Solar Panel provides maintenance-free operation that harnesses the sun's energy to power controllers 24 hours a day, 7 days a week for years on end. It is compatible with XC Hybrid , that offers a on-the-wall and in-valve-box installation. Connecting the Solar Panel to the controller is an easy process that can be done quickly by any installer. Once connected, the Solar Panel supplies 100% of the controllers' power, and eliminates the need for battery replacements. Since there are no batteries involved, there's no need to worry about running out of power or scheduling replacement runs. So not only is the Solar Panel the most convenient solution for powering battery-operated controllers, it's the most environmentally friendly as well.