Manufacturer-documented fuel consumption for 9 120–125 kW Diesel generator sets — median 10.80 gal/h at full load, 5.57 gal/h at half load.
Compare 120–125 kW Diesel generator specs side-by-side →
| Model | kW | gal/h @ 50% | gal/h @ 100% | Tank (L) | Runtime @ 50% (h) |
|---|---|---|---|---|---|
| Caterpillar GEP150 | 120 | — | 8.11 | 279 | — |
| Cummins/Onan C150 D5 | 120 | — | 0.40 | 250 | — |
| FG Wilson P150 | 120 | 4.41 | 3.35 | 349 | 20.9 |
| FG Wilson P165-1 | 120 | 5.57 | 10.80 | 349 | 16.5 |
| MQ Power 1400 Amp Diesel Studio Generator | 120 | 9.25 | 16.91 | 568 | 16.2 |
| Perkins 1006TAG2 | 120 | 5.28 | 10.83 | — | — |
| Perkins OLYMPIAN TM | 120 | — | 10.83 | 349 | — |
| Hipower HRJW-190 T4F | 121 | 5.68 | 10.94 | — | — |
| Cummins/Onan G-Drive B6.7-G17 | 124 | — | 9.77 | — | — |
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 9 models with manufacturer data, full-load consumption runs 0.40–16.91 gal/h (median 10.80); at 50% load the median is 5.57 gal/h.
At 50% load, documented tank sizes give 16.2–20.9 hours (median 16.5 h) across 3 models.