APC Easy UPS On-Line SRV 6000VA / 6000w RM with Extended Runtime Battery Pack: OutputMax Configurable Power (Watts)6.0kWatts / 6.0kVAOutput Voltage NoteConfigurable for 220 : 230 or 240 nominal output voltageEfficiency at Full Load94.0 %Output Voltage Distortion1 %Output Frequency (sync to mains)50/60 Hz +/- 3 Hz Sync to mainsOther Output Voltages220 V, 240&a