Cummins QSK38-G9 vs VMAN D30B3
The Cummins QSK38-G9 and VMAN D30B3 are both diesel generator engines in a similar power class. Both are rated at roughly 1,025 kVA. Displacement is 37.8 L versus 29.235 L. The table below compares their full specifications side by side.
| Specification | Cummins QSK38-G9 | VMAN D30B3 |
|---|---|---|
| Headline rating | 1,025 kVA | 1,024 kVA |
| Standby (50 Hz) | 820 kWe | — |
| Prime (50 Hz) | 743 kWe | — |
| Standby (60 Hz) | — | 819 kWe |
| Prime (60 Hz) | — | 743 kWe |
| Displacement | 37.8 L | 29.235 L |
| Configuration | V12 | V16 |
| Cylinders | 12 | 16 |
| Rated speed | 1,500 RPM | 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | China National Stage III / Unregulated | Unregulated |
| Dry weight | — | — |
| Origin | China | China |
Choosing between Cummins QSK38-G9 and VMAN D30B3
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 Cummins QSK38-G9 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.