PSI 22L vs Waukesha VGF18GL/GLD (F18GL/GLD)
The PSI 22L and Waukesha VGF18GL/GLD (F18GL/GLD) are both natural gas generator engines in a similar power class. Both are rated at roughly 397 kVA. Displacement is 21.93 L versus 18 L. The table below compares their full specifications side by side.
| Specification | PSI 22L | Waukesha VGF18GL/GLD (F18GL/GLD) |
|---|---|---|
| Headline rating | 400 kVA | 394 kVA |
| Standby (50 Hz) | 320 kWe | — |
| Prime (50 Hz) | 280 kWe | — |
| Standby (60 Hz) | 450 kWe | 315 kWe |
| Prime (60 Hz) | 375 kWe | 310 kWe |
| Displacement | 21.93 L | 18 L |
| Configuration | V12 | L6 |
| Cylinders | 12 | 6 |
| Rated speed | 1,500 / 1,800 RPM | 1,800 RPM |
| Fuel | Natural Gas | Natural Gas |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Stationary | Unregulated |
| Dry weight | 1650 kg | — |
| Origin | United States | United States |
Choosing between PSI 22L and Waukesha VGF18GL/GLD (F18GL/GLD)
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 PSI 22L has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.