Komaes 40 Amp MPPT Solar Charge Controller Innovative MPPT technology , peak conversion efficiency of 98%. Support 3 charging options: Sealed, Gel, and Flooded Very low impedance and reduceded voltage of charge&Discharge path ,reduce power loss and reduce heat Over temperature, over charging, PV and load short, PV (battery) revered, over current protection Widely used, automatically recognize day/night Peak efficiency of 98% Four stage charging process Sealed, Gel, and Flooded, battery option The MPPT operation is fully automatic. Widely used, automatically recognize day/night