REDARC MANAGER30 S3 BATTERY MANAGEMENT SYS Use To Charge And Maintain Auxiliary Batteries; 520 Watt; 30 Amp Continuous Output Current; 110 Volt AC/ 9 To 32 Volt DC Input Voltage; 12 Volt DC Output Voltage; 445 Millimeter Length x 185 Millimeter Width x 79 Millimeter Height; With Short Circuit/ Surge/ Reverse Polarity/ Overload Protection