4000 watt ONAN gas driven 120/240 volt AC genset will power a small house as a standby unit or would make a good unit to install on a service truck to power AC accessories. Model: 4.0BF-3CR16000B Design: revolving armature, four pole1800RPM. Rating(in watts) 4000 WATTS(4KW) Voltage: 120 or 120/240 Current rating: 120 volt 33.3 amps. 240 volt 16.4 amps. Phase: Single Wire: 4 wire reconnectable Output: Continuous Cranking current: 75 amps.