Mitsubishi 12KU30GSI-PLUS vs Niigata 12V28AGS
The Mitsubishi 12KU30GSI-PLUS and Niigata 12V28AGS are both natural gas generator engines in a similar power class. The Niigata 12V28AGS is the higher-output unit (5,000 kVA vs 4,750 kVA). Displacement is 322.3 L versus 288 L. The table below compares their full specifications side by side.
| Specification | Mitsubishi 12KU30GSI-PLUS | Niigata 12V28AGS |
|---|---|---|
| Headline rating | 4,750 kVA | 5,000 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | 3,800 kWe | 4,000 kWe |
| Standby (60 Hz) | — | — |
| Prime (60 Hz) | — | — |
| Displacement | 322.3 L | 288 L |
| Configuration | L12 | V12 |
| Cylinders | 12 | 12 |
| Rated speed | 750 RPM | 750 RPM |
| Fuel | Natural Gas | Natural Gas |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | — | Unregulated |
| Dry weight | 40000 kg | — |
| Origin | Japan | Japan |
Choosing between Mitsubishi 12KU30GSI-PLUS and Niigata 12V28AGS
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 Niigata 12V28AGS has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.