Cummins L9G18 vs SDEC 6ETAA12.8-G48
The Cummins L9G18 and SDEC 6ETAA12.8-G48 are both diesel generator engines in a similar power class. Both are rated at roughly 311 kVA. Displacement is 8.8 L versus 12.8 L. The table below compares their full specifications side by side.
| Specification | Cummins L9G18 | SDEC 6ETAA12.8-G48 |
|---|---|---|
| Headline rating | 311 kVA | 310 kVA |
| Standby (50 Hz) | 249 kWe | 248 kWe |
| Prime (50 Hz) | 228 kWe | 225 kWe |
| Standby (60 Hz) | 258 kWe | — |
| Prime (60 Hz) | 235 kWe | — |
| Displacement | 8.8 L | 12.8 L |
| Configuration | L6 | L6 |
| Cylinders | 6 | 6 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Final Tier 4 / EU Stage V | China National Stage IV / Unregulated |
| Dry weight | — | — |
| Origin | United States | China |
Choosing between Cummins L9G18 and SDEC 6ETAA12.8-G48
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 L9G18 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.