16 45–50 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 G45F3S | 45.0 kW | 1 | — | — | — |
| Cummins/Onan C45 N6H | 45.0 kW | 1 or 3 | — | 1251.0 kg | — |
| Kohler KG45 | 45.0 kW | 3 | — | 862.0 kg | — |
| Cummins/Onan GGPC | 45.0 kW | 3-phase, 1-phase | 67.0 dBA | 857.0 kg | 270.2 L |
| Cummins/Onan RX 45 | 45.0 kW | 1 | 67.0 dBA | 635.0 kg | — |
| Generac Guardian Series Liquid-Cooled 45 kW unit | 45.0 kW | — | — | — | — |
| Spectrum 50GS50 | 45.0 kW | 3 | — | — | — |
| Generac QT045 | 45.0 kW | 1Ø or 3Ø | 73.0 dBA | — | — |
| Generac In Line | 45.0 kW | 3-phase | — | — | — |
| Cummins/Onan C45 N6 | 45.0 kW | 1-phase,3-phase | — | 989.0 kg | — |
| Generac SG045 | 45.0 kW | Three-Phase | — | 714.0 kg | — |
| SDMO G50 | 45.0 kW | 3 | — | — | — |
| Cummins/Onan 47GGFE | 47.0 kW | 1 or 3 | 66.3 dBA | 1197.0 kg | — |
| Generac XG04845 | 48.0 kW | 1 or 3 | — | 689.0 kg | — |
| Kohler 48RCLB | 48.0 kW | 3 | 61.0 dBA | 767.0 kg | — |
| Generac QT048 | 48.0 kW | — | 65.0 dBA | 44.0 kg | — |
Among 45–50 kW Bi-Fuel (NG/LP) generators in this comparison, the Kohler 48RCLB is quietest at 61.0 dBA.
Among 45–50 kW Bi-Fuel (NG/LP) generators in this comparison, the Generac QT048 is lightest at 44.0 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.