7 40–45 kw natural gas 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 |
|---|---|---|---|---|---|
| MTU 4R0063 GS40 | 40.0 kW | 3 | 71.7 dBA | 544.0 kg | — |
| Winco PSS40-3 | 40.0 kW | Single Phase,Three Phase | — | — | — |
| Winco PSS40-4 | 40.0 kW | Single Phase,Three Phase | — | — | — |
| Winco PSS40-17 | 40.0 kW | Single Phase,Three Phase | — | — | — |
| Winco PSS40-18 | 40.0 kW | Three Phase | — | — | — |
| Generac 3.9GN | 40.0 kW | 1 | — | — | — |
| Generac SG040 | 40.0 kW | 1-phase | — | 714.0 kg | — |
Among 40–45 kW Natural Gas generators in this comparison, the MTU 4R0063 GS40 is lightest at 544.0 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.