The difference that matters
The WEN GN400iM RV-Ready 4000-Watt Open Frame Inverter Generator is an inverter model; the other is not.
Side by side
| Specification | WEN GN400iM RV-Ready 4000-Watt Open Frame Inverter Generator | Westinghouse Outdoor Power WGen3600v Generator - Stationary |
|---|---|---|
| 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 | — | 106 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) | $0.11 | $0.11 |
| Price seen | $375 | $399 |
| 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 GN400iM RV-Ready 4000-Watt Open Frame Inverter Generator
Choose the WEN GN400iM RV-Ready 4000-Watt Open Frame Inverter Generator if you power sensitive electronics.
Westinghouse Outdoor Power WGen3600v Generator - Stationary
Choose the Westinghouse Outdoor Power WGen3600v Generator - Stationary 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