Cummins Onan P4500i vs Generac iQ5200
What is the difference?
The Cummins Onan P4500i has 3.7 kW of running power, 4.5 kW peak. The Generac iQ5200 has 3.9 kW of running power, 5.2 kW peak.
The Cummins Onan P4500i runs on gasoline, the Generac iQ5200 is dual-fuel.
The Cummins Onan P4500i runs 15 h at half load, the Generac iQ5200 runs 9 h at half load. The Cummins Onan P4500i runs longer on a tank.
The Cummins Onan P4500i has a 3.4 gal tank, the Generac iQ5200 has a 3.2 gal tank.
The Cummins Onan P4500i weighs 97 lb, the Generac iQ5200 weighs 111 lb. The Cummins Onan P4500i is easier to carry.
Specs side by side
| Cummins Onan P4500i | Generac iQ5200 | |
|---|---|---|
| Running W | 3700 | 3900 |
| Peak W | 4500 | 5200 |
| Fuel | gasoline | dual-fuel |
| Tank (gal) | 3.4 | 3.2 |
| Run time @50 % (h) | 15 | 9 |
| Noise (dB) | — | — |
| CO shutoff | — | yes |
| Weight (lb) | 97 | 111 |
| Warranty (yr) | 3 | — |
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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 more running watts, Cummins Onan P4500i or Generac iQ5200?
The Generac iQ5200. More running watts: 3900 W vs 3700 W.
Which is lighter, Cummins Onan P4500i or Generac iQ5200?
The Cummins Onan P4500i. Lighter: 97 lb vs 111 lb.
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Compare other models → · All Cummins models · All Generac models