Cummins QSK23-G5 vs SDEC 6KTAA25-G32.1
The Cummins QSK23-G5 and SDEC 6KTAA25-G32.1 are both diesel generator engines in a similar power class. Both are rated at roughly 844 kVA. Displacement is 23.152 L versus 25 L. The table below compares their full specifications side by side.
| Specification | Cummins QSK23-G5 | SDEC 6KTAA25-G32.1 |
|---|---|---|
| Headline rating | 838 kVA | 849 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | — | — |
| Standby (60 Hz) | 670 kWe | 679 kWe |
| Prime (60 Hz) | 592 kWe | 617 kWe |
| Displacement | 23.152 L | 25 L |
| Configuration | L6 | L6 |
| Cylinders | 6 | 6 |
| Rated speed | 1,800 RPM | 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Tier 2 | China National Stage III / Unregulated |
| Dry weight | — | — |
| Origin | United States | China |
Choosing between Cummins QSK23-G5 and SDEC 6KTAA25-G32.1
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 SDEC 6KTAA25-G32.1 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.