Kawasaki KG-12 vs Niigata 18V28AGS
The Kawasaki KG-12 and Niigata 18V28AGS are both natural gas generator engines in a similar power class. The Niigata 18V28AGS is the higher-output unit (7,500 kVA vs 6,500 kVA). Displacement is 407.2 L versus 432 L. The table below compares their full specifications side by side.
| Specification | Kawasaki KG-12 | Niigata 18V28AGS |
|---|---|---|
| Headline rating | 6,500 kVA | 7,500 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | 5,200 kWe | 6,000 kWe |
| Standby (60 Hz) | — | — |
| Prime (60 Hz) | 5,000 kWe | — |
| Displacement | 407.2 L | 432 L |
| Configuration | V12 | V18 |
| Cylinders | 12 | 18 |
| Rated speed | 750 / 900 RPM | 750 RPM |
| Fuel | Natural Gas | Natural Gas |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | Unregulated |
| Dry weight | — | — |
| Origin | Japan | Japan |
Choosing between Kawasaki KG-12 and Niigata 18V28AGS
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 18V28AGS has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.