7 40–45 kw bi-fuel (ng/lp) generator models side by side — power, phase, sound level, weight and fuel tank capacity, compiled from manufacturer specification sheets.
| Model | Standby | Phase | Sound | Weight | Fuel tank |
|---|---|---|---|---|---|
| Olympian G40LG2 | 40.0 kW | — | — | 714.0 kg | — |
| Hipower HGM 40 T6U | 40.0 kW | 3 | 69.0 dBA | — | — |
| Generac XG04045 | 40.0 kW | 1-Phase,3-Phase | 64.0 dBA | — | — |
| Gillette SP-410 | 40.0 kW | — | — | — | — |
| Cummins/Onan GGPB | 40.0 kW | 3-phase, 1-phase | — | 819.0 kg | 225.0 L |
| Generac Home Standby 40 | 40.0 kW | 1 | — | — | — |
| Generac SG045 | 4.5L | 45 kW | 41.0 kW | Single-Phase, Three-Phase | — | 353.4 kg | — |
Among 40–45 kW Bi-Fuel (NG/LP) generators in this comparison, the Generac XG04045 is quietest at 64.0 dBA.
Among 40–45 kW Bi-Fuel (NG/LP) generators in this comparison, the Generac SG045 | 4.5L | 45 kW is lightest at 353.4 kg dry weight.
Not every model reports every spec — blanks mean the source document didn't state that figure, not that the value is zero.