Manufacturer-documented fuel consumption for 5 40–45 kW Bi-Fuel (NG/LP) generator sets — median 6.02 gal/h at full load, 3.12 gal/h at half load.
Compare 40–45 kW Bi-Fuel (NG/LP) generator specs side-by-side →
| Model | kW | gal/h @ 50% | gal/h @ 100% | Tank (L) | Runtime @ 50% (h) |
|---|---|---|---|---|---|
| Generac G40LG2 | 40 | 119.14 | 198.66 | — | — |
| Generac QT040 | 40 | 3.12 | 6.02 | — | — |
| Generac SG040 | 40 | 80.57 | 161.14 | — | — |
| Generac XG04045 | 40 | 2.22 | 3.58 | — | — |
| Kohler 40ERES | 40 | 0.82 | 0.75 | — | — |
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 0.75–198.66 gal/h (median 6.02); at 50% load the median is 3.12 gal/h.