Unlock to see our ratings and compare products side by side Our average of how long a generator ran, over various loads, on a full tank of gasoline or diesel fuel, a 20-pound tank for propane ...

Our best overall pick is the Westinghouse 4,500-watt inverter generator. It’s able to run up to 18 hours on a 3.4-gallon tank with dual fuel technology. With its low oil shutdown, fuel is ...