... voltage, battery over-charge or under-voltage, overload, and short circuit.High ReliabilityIts cut-edge digital control ... Ratio3:1ConnectionsTerminal blockEfficiencyTo AC Mode88%85%To Battery Modeup to 90%BatteryTypeSealed free maintenance lead acid ... /P voltage& frequency, Battery voltage, Battery capacity, Loading, Fault codeAudible Alarm Bypass, On battery mode, Battery low, Overload, FaultAcoustic ...