Cummins GTA855E vs Generac SG230
The Cummins GTA855E and Generac SG230 are both natural gas generator engines in a similar power class. The Cummins GTA855E is the higher-output unit (307 kVA vs 288 kVA). Displacement is 14 L versus 14.2 L. The table below compares their full specifications side by side.
| Specification | Cummins GTA855E | Generac SG230 |
|---|---|---|
| Headline rating | 307 kVA | 288 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | — | — |
| Standby (60 Hz) | 245 kWe | 230 kWe |
| Prime (60 Hz) | 225 kWe | 207 kWe |
| Displacement | 14 L | 14.2 L |
| Configuration | L6 | L6 |
| Cylinders | 6 | 6 |
| 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 GTA855E and Generac SG230
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 GTA855E has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.