... 3.Various protection 4.Temp. compensate 12V/24V Single output pwm Solar charge controller SR-L1.PWM2.Digital LED display3.Various ... current5A,10A ,15A ,20A ,30A ,40A(optional)Working Voltage12V ; 24V ; 12V/24V AutoNo load losses<5mA;Charging circuit ... -4.0mV/°C/2V(boost voltage, direct charge, float charge and charge return voltage compensation)Control methodPWM Smart ChargingWorking temperatureFrom ...