- Capacity: Prime Rating: 36 kW (45 kVA) Standby Rating: 40 kW (50 kVA) - Voltage: Single phase: 120, 127, 139, 240, 254, 277V (switchable) Three phase: 208, 220, 240, 416, 440, 480V (switchable) - Fuel Tank Capacity: 79 gal (378.5L) 27 hr. run time @ full load