Manufacturer-documented fuel consumption for 10 50–55 kW Bi-Fuel (NG/LP) generator sets — median 7.37 gal/h at full load, 4.17 gal/h at half load.
Compare 50–55 kW Bi-Fuel (NG/LP) generator specs side-by-side →
| Model | kW | gal/h @ 50% | gal/h @ 100% | Tank (L) | Runtime @ 50% (h) |
|---|---|---|---|---|---|
| Cummins/Onan C50 N6 | 50 | 5.63 | 2.05 | — | — |
| Cummins/Onan GGPC | 50 | 4.40 | 7.40 | 270 | 16.2 |
| Cummins/Onan RS50 | 50 | 5.63 | 8.84 | — | — |
| Generac G50LG2 | 50 | 139.22 | 232.21 | — | — |
| Generac QT050 | 50 | 3.62 | 6.97 | — | — |
| Generac SG050 | 50 | 3.94 | 6.58 | — | — |
| Generac SG050T | 50 | 3.67 | 7.34 | — | — |
| Kohler 48RCLB | 50 | 1.11 | 2.14 | — | — |
| SDMO G88 | 51 | — | 22.70 | — | — |
| SDMO G60 | 54 | — | 13.21 | — | — |
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 10 models with manufacturer data, full-load consumption runs 2.05–232.21 gal/h (median 7.37); at 50% load the median is 4.17 gal/h.
At 50% load, documented tank sizes give 16.2–16.2 hours (median 16.2 h) across 1 models.