... 12V/24V Single output pwm Solar charge controller SR-L 1.PWM 2.Digital LED display 3.Various protection 4.Temp. compensate 12V/24V Single output pwm Solar charge controller ... current5A,10A ,15A ,20A ,30A ,40A(optional)Working Voltage12V ; 24V ; 12V/24V AutoNo load losses<5mA;Charging circuit ... 15VOver voltage protection17V;×2/24V;boost charge voltage14.6V; ×2/24V (duration time: 30 minutes) used every 7 ...