... 3.Various protection 4.Temp. compensate 12V/24V 15A~20A Single output pwm Solar charges SR-L12V/24V 15A ... -L seriesrated charging current5A,10A ,15A ,20A ,30A ,40A(optional)Rated discharging current5A,10A ,15A ,20A ,30A ,40A(optional)Working Voltage12V ; ... 2/24VCharge recover voltage13.2V;×2/24VOver discharge recover voltage12.5V;×2/24VLower voltage indication12.0V;×2/24VOver discharge voltage11.1V ...