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.
Compare 500–505 kW Natural Gas generator specs side-by-side →
| Model | kW | gal/h @ 50% | gal/h @ 100% | Tank (L) | Runtime @ 50% (h) |
|---|---|---|---|---|---|
| Cummins/Onan GFGA | 500 | 160.88 | 43.06 | 659 | 1.1 |
| Cummins/Onan GTA28 GS | 500 | 160.88 | 283.98 | — | — |
| Generac MG500 | 500 | — | 1.32 | — | — |
| Generac SG500 | 500 | 24.01 | 40.42 | — | — |
| MTU 12V0265 GS500 | 500 | 1.37 | 2.62 | — | — |
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.
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.
At 50% load, documented tank sizes give 1.1–1.1 hours (median 1.1 h) across 1 models.