... mswave formSine WaveVoltage T.H.D.<2% with linear load, <5% with nonlinear loadCrest factor / power factor3:1 / ... Emergency Power Off), audible alarmsSoftware ProtectionsDischarging batteries, Battery charger working, Inverter working, Emergency Power Off, manual Shutdown, Bypass SCR ... fail, inverter voltage out of range, voltage between neutral and ground high, UPS on Bypass mode, Bypass frequency out ...