... , can running free under any cold , hot , humid circumstance .Parameter: MPPT Solar Charge Controller ModelMPPT-20Max.Charge Current20ASystem Voltage12V24VMax Solar Panel ... Tracking Range12-25V24-50VFull Charge Cut14V28VCharging ModeMaximum Power Point Tracking (MPPT)Temp.CompensationNO Dimension18.8×12×5.5cm(L×W×H ...