With its long run time of 12 hours ... a 30-year veteran electrician. A generator with 5,000 to 7,500 watts is necessary for most homes to run essential appliances like refrigerators, air ...

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-based portables, or a 250-gallon propane tank for stationary models.