Wagan EL2510 Solar Power Control Solar power controller Ensures that the battery is fully charged Fuse protection on both battery and solar array Built in LCD digital display monitors solar charge performance and shows battery voltage, and solar power current Controls your energy source and protects batteries from being overcharged Designed to protect your 12 volt GEL or lead-acid battery from being overcharged by solar panel Ensures the battery is properly and fully charged, resulting in enhanced battery performance with less battery maintenance A built in LCD digital display that monitors solar charge performance and shows battery voltage, solar panel current as well as output charge current Control your energy source and protect batteries from being overcharged Fuse protection on both battery and solar array