Cummins Onan P2500i vs Westinghouse iGen2800DFc
What is the difference?
The Cummins Onan P2500i has 2.2 kW of running power, 2.5 kW peak. The Westinghouse iGen2800DFc has 2.2 kW of running power, 2.8 kW peak.
The Cummins Onan P2500i runs on gasoline, the Westinghouse iGen2800DFc is dual-fuel.
The Cummins Onan P2500i runs 8 h at half load, the Westinghouse iGen2800DFc runs 6 h at half load. The Cummins Onan P2500i runs longer on a tank.
The Cummins Onan P2500i has a 1 gal tank, the Westinghouse iGen2800DFc has a 1.1 gal tank.
The Cummins Onan P2500i weighs 46 lb, the Westinghouse iGen2800DFc weighs 45 lb.
Both have a 3-year warranty.
Both have 120 V AC output.
Specs side by side
| Cummins Onan P2500i | Westinghouse iGen2800DFc | |
|---|---|---|
| Running W | 2200 | 2200 |
| Peak W | 2500 | 2800 |
| Fuel | gasoline | dual-fuel |
| Tank (gal) | 1 | 1.1 |
| Run time @50 % (h) | 8 | 6 |
| Noise (dB) | — | — |
| CO shutoff | — | — |
| Weight (lb) | 46 | 45 |
| Warranty (yr) | 3 | 3 |
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Specs as read from manufacturer pages on 2026-10-31 / 2026-10-26. Specs one maker does not list are left out of the comparison. Sponsored links; we may earn a commission.
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