20 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 |
|---|---|---|---|---|---|
| Generac QT04524ANSN | 45.0 kW | — | — | — | — |
| Generac QT04524ANSY | 45.0 kW | — | — | — | — |
| Generac QT04524ANSX | 45.0 kW | — | — | — | — |
| Generac QT04524ANSC | 45.0 kW | — | — | — | — |
| Cummins/Onan C45 N6 | 45.0 kW | 1-phase,3-phase | — | 989.0 kg | — |
| Olympian G45LG2 | 45.0 kW | — | — | 714.0 kg | — |
| Generac QT045 | 45.0 kW | — | 73.0 dBA | — | — |
| Cummins/Onan GGPC | 45.0 kW | 3-phase, 1-phase | — | 857.0 kg | 270.2 L |
| Generac RG45 | 45.0 kW | 1 | — | — | — |
| Generac RG04524 | 45.0 kW | 1-Phase or 3-Phase | 58.0 dBA | 30.6 kg | — |
| Kohler 50REZG | 46.0 kW | 3 Ph | 69.0 dBA | 1381.0 kg | 625.0 L |
| Kohler 48RCLB | 48.0 kW | 3 | 61.0 dBA | 767.0 kg | — |
| Generac QT04824ANAN | 48.0 kW | — | — | — | — |
| Generac QT04842ANAX | 48.0 kW | — | — | — | — |
| Generac QT04842ANAC | 48.0 kW | — | — | — | — |
| Kohler 48RCLC | 48.0 kW | 1Ph | 61.0 dBA | 767.0 kg | — |
| Generac RG048 | 48.0 kW | — | 68.0 dBA | 808.0 kg | — |
| Generac QT048 | 48.0 kW | — | 65.0 dBA | 789.25 kg | — |
| Generac SG050NA | 4.5L | 50 kW | 48.0 kW | Single-Phase,Three-Phase | — | 379.4 kg | — |
| Generac RG04845 | 48.0 kW | Single Phase,Three Phase | 68.0 dBA | — | — |
Among 45–50 kW Bi-Fuel (NG/LP) generators in this comparison, the Generac RG04524 is quietest at 58.0 dBA.
Among 45–50 kW Bi-Fuel (NG/LP) generators in this comparison, the Generac RG04524 is lightest at 30.6 kg dry weight.
Among 45–50 kW Bi-Fuel (NG/LP) generators in this comparison, the Kohler 50REZG has the largest fuel tank at 625.0 L.
Not every model reports every spec — blanks mean the source document didn't state that figure, not that the value is zero.