Cummins QSX15G7 vs Perkins 2506D-E15TAG1
The Cummins QSX15G7 and Perkins 2506D-E15TAG1 are both diesel generator engines in a similar power class. Both are rated at roughly 563 kVA. The table below compares their full specifications side by side.
| Specification | Cummins QSX15G7 | Perkins 2506D-E15TAG1 |
|---|---|---|
| Headline rating | 563 kVA | 563 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | — | — |
| Standby (60 Hz) | 450 kWe | 450 kWe |
| Prime (60 Hz) | 410 kWe | 400 kWe |
| Displacement | 15 L | 15 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 / EU Stage II | U.S. EPA Tier 3 |
| Dry weight | — | — |
| Origin | United States | United States |
Choosing between Cummins QSX15G7 and Perkins 2506D-E15TAG1
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.