... X parallel redundancy. 5.IGBT inverter,RS232,SNMP Online Low Frequency UPS Power Supplies:· True online and double conversion design Effectively ... battery capacityNoise LevelDistance is 1 meter<55db(A)DisplayLEDAC, Inverter, Low battery, Bypass, Overload, FailureLCDLCD indicates voltage,frequency, battery,load, ... than 100 skilled employees. OEM order is warmly welcome. UPS Power Supply HQ3120L-20KVA