Manufacturer-documented fuel consumption for 33 50–55 kW Diesel generator sets — median 3.62 gal/h at full load, 1.92 gal/h at half load.
Compare 50–55 kW Diesel generator specs side-by-side →
| Model | kW | gal/h @ 50% | gal/h @ 100% | Tank (L) | Runtime @ 50% (h) |
|---|---|---|---|---|---|
| Caterpillar D50 GC | 50 | 8.61 | 14.90 | — | — |
| Cummins/Onan 50 DGCA | 50 | — | 2.40 | — | — |
| Cummins/Onan 50 DSFAC | 50 | 10.04 | 2.40 | — | — |
| Cummins/Onan 50.0 DDB 15R | 50 | — | 3.91 | — | — |
| Cummins/Onan 50.0DDB-15R | 50 | — | 1.03 | — | — |
| Cummins/Onan 50.0DDB-9XR | 50 | — | 1.03 | — | — |
| Cummins/Onan 60.0 DYA 515R | 50 | — | 1.27 | — | — |
| Cummins/Onan C50 D6 | 50 | 0.97 | 1.81 | 500 | 135.9 |
| FG Wilson P50-1S | 50 | 1.88 | 3.65 | 219 | 30.8 |
| FG Wilson P50-3S | 50 | 1.95 | 3.54 | 219 | 29.6 |
| Generac RD050 | 50 | 0.22 | 0.39 | 235 | 276.1 |
| Generac SD050 | 50 | 2.30 | 2.64 | 100 | 11.5 |
| Kohler 50EFOZC | 50 | 2.01 | 3.72 | — | — |
| Kohler 50EFOZD | 50 | 2.01 | 3.72 | — | — |
| Kohler KD120U | 50 | — | 8.45 | 340 | — |
| Kohler KD130 | 50 | — | 8.45 | 340 | — |
| MTU 4R0113 DS50 | 50 | 1.37 | 2.62 | — | — |
| MTU 4R0113 DS50 SCAQMD | 50 | 1.37 | 2.62 | — | — |
| MTU MTU 4R0113 DS50 | 50 | 1.37 | 2.62 | — | — |
| Northern Lights M50T13 | 50 | — | 3.86 | — | — |
| MTU 4R0113 DS63 | 50 | 1.85 | 3.62 | 145 | 20.7 |
| MTU mtu 4R0113 DS63 | 50 | 1.85 | 3.62 | 145 | 20.7 |
| Cummins/Onan 48 DGCA | 51 | — | 3.38 | 197 | — |
| Kohler 50REOZJ | 51 | 2.01 | 3.62 | — | — |
| FG Wilson P65 | 52 | 1.32 | 2.88 | 219 | 43.8 |
| FG Wilson P65E1 | 52 | — | 3.70 | 176 | — |
| Kohler 50REOZK | 52 | 2.19 | 4.25 | 15 | 1.8 |
| Perkins 1103A-33TG2 | 53 | 4.00 | — | — | — |
| SDMO J 66 K | 53 | — | 4.23 | 180 | — |
| SDMO R66K | 53 | — | 4.23 | — | — |
| Cummins/Onan 4BTAA3.3-G13 | 54 | 1.85 | 3.17 | — | — |
| Northern Lights NL1064T23 | 54 | — | 4.60 | — | — |
| Perkins 1104C-44G2 | 54 | 10.30 | 12.42 | — | — |
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 32 models with manufacturer data, full-load consumption runs 0.39–14.90 gal/h (median 3.62); at 50% load the median is 1.92 gal/h.
At 50% load, documented tank sizes give 1.8–276.1 hours (median 29.6 h) across 9 models.