PSI 18L vs VMAN DT15NG
The PSI 18L and VMAN DT15NG are both natural gas generator engines in a similar power class. Both are rated at roughly 344 kVA. Displacement is 18.3 L versus 15.07 L. The table below compares their full specifications side by side.
| Specification | PSI 18L | VMAN DT15NG |
|---|---|---|
| Headline rating | 338 kVA | 350 kVA |
| Standby (50 Hz) | 270 kWe | — |
| Prime (50 Hz) | — | 280 kWe |
| Standby (60 Hz) | 350 kWe | — |
| Prime (60 Hz) | — | — |
| Displacement | 18.3 L | 15.07 L |
| Configuration | V10 | V8 |
| Cylinders | 10 | 8 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 RPM |
| Fuel | Natural Gas | Natural Gas |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Stationary | Unregulated |
| Dry weight | — | — |
| Origin | United States | China |
Choosing between PSI 18L and VMAN DT15NG
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 VMAN DT15NG has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.