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500–505 kW Natural Gas Generator Fuel Consumption

Manufacturer-documented fuel consumption for 5 500–505 kW Natural Gas generator sets — median 40.42 gal/h at full load, 92.45 gal/h at half load.

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Consumption by model

5
ModelkWgal/h @ 50%gal/h @ 100% Tank (L)Runtime @ 50% (h)
Cummins/Onan GFGA500160.8843.066591.1
Cummins/Onan GTA28 GS500160.88283.98
Generac MG5005001.32
Generac SG50050024.0140.42
MTU 12V0265 GS5005001.372.62

Figures from each model’s own manufacturer documentation (spec sheets and manuals); runtime = documented tank capacity ÷ consumption at 50% load. Verify against the datasheet for your exact configuration.

Common questions

How much fuel does a 500–505 kW Natural Gas generator use?

Across 5 models with manufacturer data, full-load consumption runs 1.32–283.98 gal/h (median 40.42); at 50% load the median is 92.45 gal/h.

How long will a 500–505 kW Natural Gas generator run on a full tank?

At 50% load, documented tank sizes give 1.1–1.1 hours (median 1.1 h) across 1 models.