Firman H03655 vs WEN GN5602X
What is the difference?
The Firman H03655 has 3.65 kW of running power, 4.55 kW peak. The WEN GN5602X has 4.5 kW of running power, 5.6 kW peak.
The Firman H03655 is dual-fuel, the WEN GN5602X runs on gasoline.
The Firman H03655 runs 14 h at half load, the WEN GN5602X runs 12.5 h at half load. The Firman H03655 runs longer on a tank.
The Firman H03655 has a 5 gal tank, the WEN GN5602X has a 4.3 gal tank.
Both have a 3-year warranty.
Both have 120 V AC output.
Specs side by side
| Firman H03655 | WEN GN5602X | |
|---|---|---|
| Running W | 3650 | 4500 |
| Peak W | 4550 | 5600 |
| Fuel | dual-fuel | gasoline |
| Tank (gal) | 5 | 4.3 |
| Run time @50 % (h) | 14 | 12.5 |
| Noise (dB) | 67 | — |
| CO shutoff | — | yes |
| Weight (lb) | 112 | — |
| Warranty (yr) | 3 | 3 |
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Specs as read from manufacturer pages on 2026-11-04 / 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, Firman H03655 or WEN GN5602X?
The WEN GN5602X. More running watts: 4500 W vs 3650 W.