Typically a 50 amp generator burns at least one gallon of lp per hour while a 30 amp generator will consume about a half a gallon of lp per hour.
Lp gas generator fuel consumption.
But just for shits and giggles let s give it a shot.
Most portable generators will run on gasoline out of convenience.
A typical generator uses three quarters of gas gallons per hour.
At least for long periods of time.
You simply divide the energy content of the propane by the burner consumption.
As for another example again depending on what you are powering and the size of your generator let s say 20kw in this example a propane generator may use around 2 3 gallons hour.
So if you are paying over 0 88 per gallon for gasoline you can save by using natural gas.
Propane gas consumption chart.
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To compare that to gasoline 110 000 btu per gallon times the cost by 1 1 to arrive at 0 88 per gallon.
As you might know all generators are not created equals some will consume more and some others may use less than what was mentioned.
50 load 2500 watts output average should use no more than 50 000 btu per hour and cost approximately 0 40 to operate.
These numbers are just estimates and each generator must be estimated for it s individual fuel consumption.
Gasoline prices are somewhat expensive and tend to be the least efficient way to run a generator.
For example if a burner uses 22 875 btu per hour it will last 4 hours on a gallon of propane which contains 91 502 btu.
A standard 5 000 watt generator will consume around 18 gallons of gasoline during a 1 day 24 hour period.