Manufacturer-documented fuel consumption for 14 1250–1255 kW Diesel generator sets — median 71.72 gal/h at full load, 41.47 gal/h at half load.
Compare 1250–1255 kW Diesel generator specs side-by-side →
| Model | kW | gal/h @ 50% | gal/h @ 100% | Tank (L) | Runtime @ 50% (h) |
|---|---|---|---|---|---|
| Cummins/Onan C1250D6E | 1250 | 51.78 | 95.37 | — | — |
| Cummins/Onan DFLC | 1250 | — | 6.23 | — | — |
| Cummins/Onan DQGAA | 1250 | 47.10 | 81.60 | — | — |
| Generac IDLC1250 | 1250 | 56.27 | 24.83 | — | — |
| Katolight D1250FNZ4 | 1250 | 41.47 | 76.87 | — | — |
| Katolight D1250FRZ4 | 1250 | 41.47 | 76.87 | — | — |
| Katolight D1250FSZ4 | 1250 | 41.47 | 76.87 | — | — |
| Kohler KD1250-4 | 1250 | 40.42 | 79.52 | 5863 | 38.3 |
| MTU 12V4000 DS1250 | 1250 | 1.37 | 2.62 | — | — |
| MTU 16V2000 DS1250 | 1250 | 1.37 | 2.62 | — | — |
| MTU 18V2000 DS1250 | 1250 | 1.37 | 2.62 | — | — |
| SDMO EXEL 2 X 1250 UC | 1250 | — | 8.51 | — | — |
| SDMO X1250UC | 1250 | — | 66.57 | — | — |
| SDMO XS 1250 UC | 1250 | — | 264.17 | 1000 | — |
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 14 models with manufacturer data, full-load consumption runs 2.62–264.17 gal/h (median 71.72); at 50% load the median is 41.47 gal/h.
At 50% load, documented tank sizes give 38.3–38.3 hours (median 38.3 h) across 1 models.