Manufacturer-documented fuel consumption for 26 35–40 kW Diesel generator sets — median 2.64 gal/h at full load, 1.48 gal/h at half load.
Compare 35–40 kW Diesel generator specs side-by-side →
| Model | kW | gal/h @ 50% | gal/h @ 100% | Tank (L) | Runtime @ 50% (h) |
|---|---|---|---|---|---|
| Caterpillar D50-6 | 35 | — | 4.39 | — | — |
| Cummins/Onan 35 DSFAA | 35 | 10.04 | 2.40 | — | — |
| Cummins/Onan C35 D6 | 35 | — | 2.20 | 170 | — |
| Cummins/Onan DGBB | 35 | 1.59 | 2.64 | 24 | 4.0 |
| FG Wilson P35-1S | 35 | 1.40 | 2.56 | 219 | 41.3 |
| FG Wilson P35-2S | 35 | — | 2.54 | 219 | — |
| Generac MMG45FHK | 35 | 1.51 | 3.01 | 401 | 70.4 |
| Generac SD035 | 35 | 0.79 | 3.09 | 187500 | 62500.0 |
| Kohler 35EFKOZD | 35 | 1.66 | 3.09 | — | — |
| MTU 4R0113 DS44 | 35 | 1.82 | 3.30 | — | — |
| SDMO J 44 K | 35 | — | 0.45 | 100 | — |
| SDMO R44K | 35 | — | 2.96 | — | — |
| Emsa E BD XX 0044 | 35 | 0.69 | 1.24 | 101 | 38.8 |
| FG Wilson P44E1 | 35 | — | 2.75 | 176 | — |
| Caterpillar D40-6 | 36 | — | 3.86 | — | — |
| Cummins/Onan X3.3-G1 | 36 | 1.14 | 1.69 | — | — |
| FG Wilson P50-2 | 36 | 1.48 | 2.30 | 219 | 39.1 |
| Northern Lights M1064D | 36 | — | 2.30 | — | — |
| Northern Lights NL944T3 | 36 | 1.40 | 2.27 | — | — |
| Cummins/Onan 37.5 DEF-515R | 38 | — | 3.51 | — | — |
| Cummins/Onan 37.5 DEF-53R | 38 | — | 3.51 | — | — |
| MQ Power DCA45USI | 38 | — | 2.23 | — | — |
| Northern Lights M38C3 | 38 | 0.40 | — | — | — |
| Northern Lights M944 | 38 | 0.40 | 1.96 | — | — |
| Simson-Maxwell SDAC40 T6-T2 | 38 | 1.53 | 3.09 | — | — |
| Simson-Maxwell SDAC40 T6-T3 | 38 | 1.72 | 3.25 | — | — |
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 25 models with manufacturer data, full-load consumption runs 0.45–4.39 gal/h (median 2.64); at 50% load the median is 1.48 gal/h.
At 50% load, documented tank sizes give 4.0–62500.0 hours (median 40.2 h) across 6 models.