Online double-conversion with DSP control Input power factor correction (PFC) High input power factor, Low input THDi and output THDV Wide input voltage range, 50Hz/60Hz frequency self-adaptable Support battery cold start and mains supply self-starting Built-in output isolation transformer Perfect protective function Standard manual bypass Standard emergency power off (EPO) Standard RS232/USB communication port Optional RS485/Dry contact communication port Optional SNMP communication port Optional 1+1 parallel