Mitsubishi 12KU30GSI vs Waukesha 275GL+ 16V
The Mitsubishi 12KU30GSI and Waukesha 275GL+ 16V are both natural gas generator engines in a similar power class. Both are rated at roughly 4,635 kVA. Displacement is 322.3 L versus 285 L. The table below compares their full specifications side by side.
| Specification | Mitsubishi 12KU30GSI | Waukesha 275GL+ 16V |
|---|---|---|
| Headline rating | 4,750 kVA | 4,520 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | 3,800 kWe | 3,616 kWe |
| Standby (60 Hz) | — | — |
| Prime (60 Hz) | — | — |
| Displacement | 322.3 L | 285 L |
| Configuration | L12 | V16 |
| Cylinders | 12 | 16 |
| Rated speed | 750 RPM | 1,000 RPM |
| Fuel | Natural Gas | Natural Gas |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | — | Unregulated |
| Dry weight | 40000 kg | — |
| Origin | Japan | United States |
Choosing between Mitsubishi 12KU30GSI and Waukesha 275GL+ 16V
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 Mitsubishi 12KU30GSI has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.