- Capacity: Prime Rating: 120 kW (150 kVA) Standby Rating: 132 kW (165 kVA) - Voltage Voltage - Three Phase 208, 220, 240, 416, 440, 480V Switchable Voltage - Single Phase 120, 127, 139, 240, 254, 277V Switchable -Fuel tank capacity: 214 Gal.