APC Easy UPS 3S 40kVA 400V 3:3 UPS (E3SUPS40KHB1) - Max Configurable Power (Watts): 40.0kWatts / 40.0kVA, Input frequency: 45 - 65 Hz, Output Frequency (sync to mains): 50 Hz Sync to mains, 60 Hz Sync to mains, Included Battery Modules: x 3, Battery Slots Empty: x 1, Interface Port(s): E3S_Parallel, E3S_TempSensor