... characteristics:1. True online double conversion technology2. IGBT PFC technology.3. Wide input range.4. Zero ... time0mSLCD/LED information and audible alarmStatusLoad percentage, battery state, utility state, inverter and bypass state ... overload, system fault.Audible alarmBypass mode, battery mode, battery low, overload, faultNoise1 meter distance55dB60dBCommunicationsDB9 portRS232Intelligent ...