PWM Solar Street Light controller,rated charge current 20A,System voltage 24V/12V AUTO,Overload, ... batteries life; with high-precision temperature compensation.Working state clearly: LED display input, output, battery status, digital display mode.All controls ... HelpPhotovoltaic Battety and Overpressure Indicator .With sunlight to photovoltaic, SOLAR LED is solid green, green flash, it said the system ...