APC Easy UPS 3S 10 kVA 400V 3:1 UPS (E3SUPS10K3IB2) - Max Configurable Power (Watts): 10.0kWatts / 10.0kVA, Input frequency: 45 - 65 Hz, Output Frequency (sync to mains): 50 Hz Sync to mains, 60 Hz Sync to mains, Load Crest Factor: 3 : 1, Included Battery Modules: x 2, Battery Slots Empty: x 1, Interface Port(s): E3S_Parallel, E3S_TempSensor