... watt, 650 watt and 800 watt for stable voltage.• 2-stroke, high efficient gasoline engine. AlternatorModelGF650GF950GF1000TypeBrushless capacitor ExcitationFrequency (Hz)506050605060Cont. AC ... (W/VA)5006007208808801100Voltage (V)110,120,220,230,240EngineType2-Stroke, Reed valve forced, Air-cooled,Single cylinderFuel (recommended)Unleaded GasolineLubricating systemPre-mixed fuel ...