Generac iQ5200 vs WEN GN400iX
What is the difference?
The Generac iQ5200 has 3.9 kW of running power, 5.2 kW peak. The WEN GN400iX has 3.5 kW of running power, 4 kW peak.
The Generac iQ5200 is dual-fuel, the WEN GN400iX runs on gasoline.
The Generac iQ5200 runs 9 h at half load, the WEN GN400iX runs 7 h at half load. The Generac iQ5200 runs longer on a tank.
The Generac iQ5200 has a 3.2 gal tank, the WEN GN400iX has a 1.8 gal tank.
Specs side by side
| Generac iQ5200 | WEN GN400iX | |
|---|---|---|
| Running W | 3900 | 3500 |
| Peak W | 5200 | 4000 |
| Fuel | dual-fuel | gasoline |
| Tank (gal) | 3.2 | 1.8 |
| Run time @50 % (h) | 9 | 7 |
| Noise (dB) | — | — |
| CO shutoff | yes | yes |
| Weight (lb) | 111 | — |
| Warranty (yr) | — | 2 |
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Specs as read from manufacturer pages on 2026-10-25 / 2026-10-31. 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, Generac iQ5200 or WEN GN400iX?
The Generac iQ5200. More running watts: 3900 W vs 3500 W.
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