Cummins GGMC GM 3.0L vs Generac QT025A
The Cummins GGMC GM 3.0L and Generac QT025A are both natural gas generator engines in a similar power class. The Cummins GGMC GM 3.0L is the higher-output unit (36 kVA vs 31 kVA). Displacement is 2.97 L versus 2.4 L. The table below compares their full specifications side by side.
| Specification | Cummins GGMC GM 3.0L | Generac QT025A |
|---|---|---|
| Headline rating | 36 kVA | 31 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | — | — |
| Standby (60 Hz) | 29 kWe | 25 kWe |
| Prime (60 Hz) | 26 kWe | — |
| Displacement | 2.97 L | 2.4 L |
| Configuration | L4 | L4 |
| Cylinders | 4 | 4 |
| Rated speed | 1,800 RPM | 1,800 RPM |
| Fuel | Natural Gas | Natural Gas |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Stationary | U.S. EPA Stationary |
| Dry weight | — | — |
| Origin | United States | United States |
Choosing between Cummins GGMC GM 3.0L and Generac QT025A
Use this comparison as an engineering shortlist, then confirm the complete generator package against load profile, voltage, 50/60 Hz frequency, duty class, emissions rules, cooling margin, altitude, ambient temperature, enclosure design, controller features, and alternator sizing. The Cummins GGMC GM 3.0L has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.