Capable of running on gasoline, liquid propane or natural gas fuel source with the simple turn of a dial, this portable generator offers power, flexibility and reliability. Anytime, anywhere. With 12500 starting watts and 9500 running watts (Gas), the GP9500E Tri Fuel is simple to use, durable and easy to move in an emergency, around your next home project or wherever else you need it most. Onboard CO sense technology provides powerful protection from hazardous carbon monoxide and the 500cc Generac OHV engine provides consistent power for multiple applications, while a 7.5-gallon fuel tank delivers up to 9.5-hours runtime at 50 percent load (Gas).