... automatically changes as load varies12. Optional external battery pack13. EMI/RFI noise filter14. Shutdown and ... indicatorsStatusLoad level / Battery level, Battery , Utility Power, Inverter, Bypass, Overload, FaultAudible AlarmBypass, On battery mode, Battery low, Overload ... 6 x 600 x 130 (3U)Battery PackTypeInternal BatteriesExternal Battery PackNominal DC Voltage36VDC96VDC240VDCBackup Time (Full load ...