The difference that matters
The WEN GN400i RV-Ready 4000-Watt Open Frame Inverter Generator is an inverter model; the other is not. The WEN GN400i RV-Ready 4000-Watt Open Frame Inverter Generator is listed $49 lower.
Side by side
| Specification | WEN GN400i RV-Ready 4000-Watt Open Frame Inverter Generator | Westinghouse Outdoor Power WGen3600 Generator |
|---|---|---|
| Brand | WEN | Westinghouse Outdoor Power |
| Running watts | 3,500 W | 3,600 W |
| Starting watts | 4,000 W | 4,650 W |
| Fuel types | Gasoline | Gasoline |
| Fuel tank (gasoline) | — | 4 gal |
| Runtime (as stated) | — | up to 14 h |
| Noise (as stated) | — | 68 dB |
| Weight | — | 114 lb |
| Starting system | — | — |
| Inverter | Yes | No |
| Carbon monoxide shutoff | Not listed | Listed |
| Parallel capable | — | — |
| Warranty | — | 3 Year Limited |
| Household appliances it can run by watts (calc) | 19 of 20 | 19 of 20 |
| Price per running watt (calc) | $0.14 | $0.15 |
| Price seen | $480 | $529 |
| Sellers | 1 | 1 |
Highlighted rows differ. Figures come from each product's sources; runtime, recharge and cost rows are Wattstanding calculations using the same method for both.
Which should you choose?
WEN GN400i RV-Ready 4000-Watt Open Frame Inverter Generator
Choose the WEN GN400i RV-Ready 4000-Watt Open Frame Inverter Generator if you power sensitive electronics or price decides it.
Westinghouse Outdoor Power WGen3600 Generator
Choose the Westinghouse Outdoor Power WGen3600 Generator if you prefer its maker, seller or ecosystem — the published figures do not favour it.
Before you buy either
- Total your loads with the appliance load & runtime calculator.
- Confirm what each seller includes — accessories, software trials and bundles change often.
- Read the limitations on each full reference page.
Wattstanding compares published specifications; we have not tested these products side by side. How we work · Disclosure