Mitsubishi 18KU30GSI-PLUS vs Wärtsilä 12V34SG
The Mitsubishi 18KU30GSI-PLUS and Wärtsilä 12V34SG are both natural gas generator engines in a similar power class. Both are rated at roughly 7,244 kVA. Displacement is 483.5 L versus 435.9 L. The table below compares their full specifications side by side.
| Specification | Mitsubishi 18KU30GSI-PLUS | Wärtsilä 12V34SG |
|---|---|---|
| Headline rating | 7,188 kVA | 7,300 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | 5,750 kWe | 5,840 kWe |
| Standby (60 Hz) | — | — |
| Prime (60 Hz) | — | 5,580 kWe |
| Displacement | 483.5 L | 435.9 L |
| Configuration | L18 | V12 |
| Cylinders | 18 | 12 |
| Rated speed | 750 RPM | 750 / 900 RPM |
| Fuel | Natural Gas | Natural Gas |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | — | Unregulated |
| Dry weight | 60000 kg | — |
| Origin | Japan | Finland |
Choosing between Mitsubishi 18KU30GSI-PLUS and Wärtsilä 12V34SG
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 Wärtsilä 12V34SG has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.