... line topology, the H series isolated gate bipolar transistors (IGBT) for true isolation from AC input. Ideal for data ... itself off after ten seconds to conserve battery power when no power needs are detected. h).Battery level indicatorsLED's ... bypass and vice versaLED indicatorsStatusLoad level/battery level, battery , utility power, inverter, bypass, overload, faultAudible alarmBypass, on battery mode, ...