Caterpillar G3406 vs Generac SG150 (9.0L)
The Caterpillar G3406 and Generac SG150 (9.0L) are both natural gas generator engines in a similar power class. Both are rated at roughly 191 kVA. Displacement is 14.6 L versus 8.9 L. The table below compares their full specifications side by side.
| Specification | Caterpillar G3406 | Generac SG150 (9.0L) |
|---|---|---|
| Headline rating | 194 kVA | 188 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | 155 kWe | — |
| Standby (60 Hz) | — | 150 kWe |
| Prime (60 Hz) | — | — |
| Displacement | 14.6 L | 8.9 L |
| Configuration | L6 | V8 |
| Cylinders | 6 | 8 |
| Rated speed | 1,500 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 Caterpillar G3406 and Generac SG150 (9.0L)
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 Caterpillar G3406 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.