Uninterruptible power supply effective power 540 w apparent power 900 va outputs 4 x iec 320 c13 inputs 1 x iec 320 c14 interfaces rj 45 rj 11 usb rs 232 nominal voltage 230 v bridging time 46 min bridging time at minimum load 115 minutes voltage waveform stage wave frequency range 47 63 hz yield in 986 input voltage 176 294 output voltage 230 v battery technology lead acid number of batteries 1 battery charging time 8 h max curre