Cummins C450N6 vs Generac SG450
The Cummins C450N6 and Generac SG450 are both natural gas generator engines in a similar power class. Both are rated at roughly 563 kVA. Displacement is 28 L versus 21.9 L. The table below compares their full specifications side by side.
| Specification | Cummins C450N6 | Generac SG450 |
|---|---|---|
| Headline rating | 562 kVA | 563 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | — | — |
| Standby (60 Hz) | 450 kWe | 450 kWe |
| Prime (60 Hz) | — | 409 kWe |
| Displacement | 28 L | 21.9 L |
| Configuration | V12 | V12 |
| Cylinders | 12 | 12 |
| Rated speed | 1,800 RPM | 1,800 RPM |
| Fuel | Natural Gas | Natural Gas |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Stationary | Unregulated |
| Dry weight | — | — |
| Origin | United States | United States |
Choosing between Cummins C450N6 and Generac SG450
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 Generac SG450 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.