• Online double conversion with full digital control • Optimization battery group, the quantity of battery: 16/18/20pcs (Settable) • Wide input voltage range:110~286Vac • Input power factor 0.99 with PFC • Wide input frequency range • Selectable output voltage: 208/220/230/240Vac • Generator compatible • ECO mode operation for energy saving • Self-testing when UPS startup • Multiple communication interface:RS232/USB/EPO(Relay card /SNMP card optional) • Cold start • Design with maintenance switch (Optional) • Intelligent fan speed regulation • Multiple protection function:short-circuit,overload,overheat, battery overcharge and overdischarge,output low voltage and fan fault alarm