Cummins Onan P4500i vs WEN DF475T
What is the difference?
The Cummins Onan P4500i has 3.7 kW of running power, 4.5 kW peak. The WEN DF475T has 3.8 kW of running power, 4.75 kW peak.
The Cummins Onan P4500i runs on gasoline, the WEN DF475T is dual-fuel.
The Cummins Onan P4500i runs 15 h at half load, the WEN DF475T runs 11 h at half load. The Cummins Onan P4500i runs longer on a tank.
The Cummins Onan P4500i has a 3.4 gal tank, the WEN DF475T has a 4 gal tank.
The Cummins Onan P4500i has a 3-year warranty, the WEN DF475T has a 2-year warranty.
The Cummins Onan P4500i has 120 V AC output, the WEN DF475T 120/240 V. Only 240 V output can run 240 V loads such as many well pumps, dryers and central AC.
Specs side by side
| Cummins Onan P4500i | WEN DF475T | |
|---|---|---|
| Running W | 3700 | 3800 |
| Peak W | 4500 | 4750 |
| Fuel | gasoline | dual-fuel |
| Tank (gal) | 3.4 | 4 |
| Run time @50 % (h) | 15 | 11 |
| Noise (dB) | — | — |
| CO shutoff | — | — |
| Weight (lb) | 97 | — |
| Warranty (yr) | 3 | 2 |
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Specs as read from manufacturer pages on 2026-10-31 / 2026-10-25. Specs one maker does not list are left out of the comparison. Sponsored links; we may earn a commission.
Common questions
Which has the longer warranty, Cummins Onan P4500i or WEN DF475T?
The Cummins Onan P4500i. Longer warranty: 3 years vs 2 years.
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