Plenty of Power - With 13,000 starting watts and 10,500 running watts, this unit can handle heavy loads, from lights and a refrigerator to a home air conditioner and high amperage power tools. Dual Fuel Technology - This generator runs on gasoline or propane, giving you the freedom and flexibility of fuel choice. Powerful Engine - The DuroMax 500cc OHV engine is a workhorse that provides plenty of power to handle multiple jobs, from powering high voltage appliances to heavy duty power tools.