... , PV voltage ,PV current , battery voltage , battery power ,charge current, over voltage ,under voltage ,over load, short circuit , ... Current20±2 mAProtection FunctionSolar reverse-charging protection, solar reverse-connectionbattery over charge protection, battery over-dischargebattery reverse-connection protection, ... TNT, Fedex and EMS. 600W 24V Professional Wind Solar Hybrid Charge Controller