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Propane Tank Sizing & Vaporization

A propane tank must vaporize the generator's BTU per hour at the coldest expected temperature, not just hold enough gallons.

Inputs

Inputs and assumptions

From the propane consumption calculator: gallons per hour times 91,500 BTU.

Roughly 600 BTU/h per gallon at 0 F rising to about 1,000 at 40 F. Confirm against the tank table.

Result

Propane consumption
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Margin over the generator demand
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Days per fill
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Tank capacity the demand needs
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BTU per hour this tank can vaporize
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What to check

  • Tank manufacturer vaporization table at the design temperature
  • Whether the tank is in the ground, shaded, or in sun

Related calculators

Fuel figures are estimator-grade. A manufacturer fuel curve at your load and ambient beats any generic curve; verify the nameplate rating, the actual load fraction, and the delivered fuel price before you size a tank or promise a runtime.

Saved calculations

Keep the assumptions with the result.

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