Manufacturer-documented fuel consumption for 5 640–645 kW Diesel generator sets — median 42.53 gal/h at full load, 58.03 gal/h at half load.
Compare 640–645 kW Diesel generator specs side-by-side →
| Model | kW | gal/h @ 50% | gal/h @ 100% | Tank (L) | Runtime @ 50% (h) |
|---|---|---|---|---|---|
| Caterpillar 3412C | 640 | — | 29.60 | — | — |
| Kohler KD800-F | 640 | — | 115.90 | 2175 | — |
| MTU 12V 2000 G26F | 640 | 87.00 | 42.80 | — | — |
| SDMO X 800 K | 640 | — | 42.53 | — | — |
| Kohler KD27V12 | 644 | 29.06 | 34.34 | 500 | 4.5 |
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 29.60–115.90 gal/h (median 42.53); at 50% load the median is 58.03 gal/h.
At 50% load, documented tank sizes give 4.5–4.5 hours (median 4.5 h) across 1 models.