You simply divide the energy content of the propane by the burner consumption.
Lp gas generator fuel consumption.
These numbers are just estimates and each generator must be estimated for it s individual fuel 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.
50 load 2500 watts output average should use no more than 50 000 btu per hour and cost approximately 0 40 to operate.
A typical generator uses three quarters of gas gallons per hour.
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.
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.
Calculating propane gas consumption is based on the burner size.
At least for long periods of time.
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Gasoline prices are somewhat expensive and tend to be the least efficient way to run a generator.
As you might know all generators are not created equals some will consume more and some others may use less than what was mentioned.
So if you are paying over 0 88 per gallon for gasoline you can save by using natural gas.
Most portable generators will run on gasoline out of convenience.
Propane gas consumption chart.
So if you have a 500 gallon tank which can only be filled to 400 gallons then a full tank would last you around 6 to 7 days.
A standard 5 000 watt generator will consume around 18 gallons of gasoline during a 1 day 24 hour period.