Cummins K38N-G7 vs PSI 40L
The Cummins K38N-G7 and PSI 40L are both natural gas generator engines in a similar power class. The Cummins K38N-G7 is the higher-output unit (875 kVA vs 813 kVA). Displacement is 37.8 L versus 39.23 L. The table below compares their full specifications side by side.
| Specification | Cummins K38N-G7 | PSI 40L |
|---|---|---|
| Headline rating | 875 kVA | 813 kVA |
| Standby (50 Hz) | — | 650 kWe |
| Prime (50 Hz) | 700 kWe | 585 kWe |
| Standby (60 Hz) | — | 800 kWe |
| Prime (60 Hz) | 700 kWe | 725 kWe |
| Displacement | 37.8 L | 39.23 L |
| Configuration | V12 | V12 |
| Cylinders | 12 | 12 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 / 1,800 RPM |
| Fuel | Natural Gas | Natural Gas |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | U.S. EPA Stationary |
| Dry weight | — | 3390 kg |
| Origin | China | United States |
Choosing between Cummins K38N-G7 and PSI 40L
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 K38N-G7 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.