Double Conversion UPS, Capacity : 11kVA / 9kW, Power Factor : 0.9, Input Voltage : 230 V (1ph) 181รท280 V; up to 100 V @50% load, Output Voltage : 230 V (1ph) selectable 200 / 208 / 220 / 240 V - 50 or 60 Hz + /- 2 % (+/- 0.05 Hz in battery mode), RS232