How Much Propane

Does a Generator Use?

“Generators running at full capacity consume significantly more fuel than when operating at partial load," says Scott Levene, vice president of fuel specialist Levco. "For instance, a generator rated at 20 kW might use about 3 gallons of propane per hour at full load, but only around 1.5 gallons per hour at half load

On average, generators  burn 2 to 4 gallons  of propane per hour.

A generator that’s underpowered, and running at full capacity for a long time, will use more fuel than a larger model. Although the larger model costs more initially, it could save you money in the long run.

It varies by generator size, age, and condition.

There are two main types of generator: conventional and inverter. The best inverter generators are often promoted as being more fuel-efficient than their conventional rivals.

The type of generator also  plays a part in how much  propane a generator uses.

It takes twice as much natural gas for the equivalent output of propane. Propane is cheaper than gasoline but, according to the US Department of Energy, only produces about 75 percent of the power.

Propane generators are more fuel efficient than natural gas, but not gasoline.

"Prioritize critical loads and turn off non-essential appliances during power outages," Levene advises. "This practice helps keep fuel consumption lower.”

Proper use and  maintenance matter.

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