9 15–20 kw gasoline 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 |
|---|---|---|---|---|---|
| Cummins/Onan 15HQ | 15.0 kW | 3 | — | — | — |
| Cummins/Onan 15HQ-150R | 15.0 kW | — | — | — | — |
| Cummins/Onan 15.0JC | 15.0 kW | 1 or 3 | — | — | — |
| Cummins/Onan 15.0RJC | 15.0 kW | 1 | — | — | — |
| Cummins/Onan 15.0JC-3CR | 15.0 kW | 1 | — | — | — |
| Kohler 15RYG | 15.0 kW | — | — | — | — |
| Generac GPS 15000 | 15.0 kW | Single Phase | — | — | — |
| Aurora Generators 15HK | 15.0 kW | — | — | — | 75.7 L |
| Generac GP18000EFI | 18.0 kW | single | — | 199.2 kg | 54.0 L |
Among 15–20 kW Gasoline generators in this comparison, the Aurora Generators 15HK has the largest fuel tank at 75.7 L.
Not every model reports every spec — blanks mean the source document didn't state that figure, not that the value is zero.