WEN TF1050iX
#5 in LargeFull review
A tri-fuel home-backup inverter that can sit on natural gas indefinitely. Good for a transfer switch or a 50 A RV.
WEN $1,649$1,649
3.7/5
A big, low-cost-per-watt open-frame inverter for whole-house backup on gas, propane or natural gas. Too loud for campgrounds.
- 7,750 / 10,000 WRunning / starting
- Gasoline, propane, natural gasFuel
- 15 hr at 25% loadRun time
- 72 dBA at light loadNoise
- 180.8 lbWeight
- $0.18Price / W
Check price at Amazon$1,398.82
Price checked October 22, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Runs on gasoline, propane or natural gas, with hoses for both gases included
- Enough power for most of a house through a transfer switch, plus a 50 A RV outlet
- Inverter power is safe for electronics and EV chargers at a much lower price than enclosed models this size
- Large tank runs about 15 hours at light load
Cons
- Open frame is much louder than enclosed inverters
- At about 181 lb it needs a ramp or two strong people to load
- Short propane run time at light load per the maker
- Can’t be paired with a second unit
How it scores
The rating comes from 7 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
Specifications
| Model number | 201520 |
|---|---|
| Output | |
| Gasoline | 7,750 W running, 10,000 W starting |
| Propane | 6,975 W running, 10,000 W starting |
| Natural gas | 6,278 W running |
| Outlets | 4 × 120 V, L14-30 |
| Parallel capable | No |
| Total harmonic distortion | under 3% |
| Price per watt | $0.18 |
| Fuel and run time | |
| Fuel | Gasoline, propane, natural gas |
| Tank | 7.5 gal |
| Run time (gasoline) | 15 hr at 25% load |
| Run time (propane, 20 lb tank) | 8 hr |
| Engine | 459 cc |
| Noise and safety | |
| Rated noise (light load) | 72 dBA |
| CO shutoff | Yes |
| Build | |
| Starting | Electric and recoil |
| App | No |
| Wheels | Yes |
| Dimensions | 27.1 x 28 x 26.2 in |
| Weight | 180.8 lb |
| Warranty | 3 years |
Alternatives in this size
GENMAX GM8000iETC
#6 in LargeFull review
A mid-priced tri-fuel inverter for home backup through a transfer switch, especially for houses with a natural gas line. Auto start, app control and CO shutoff are unusual at this price.
Amazon $1,499.99$1,499.99
Champion 11000W Wireless Start Inverter
#8 in LargeFull review
A quiet, large inverter for whole-house backup or a 50 A RV when you want enclosed-inverter noise levels. Gas only, so plan fuel storage.
Amazon $1,899$1,899
Compare
Compare the Champion 10000W Tri Fuel Open Frame with any other inverter generator →
More from Champion: every Champion product ranked.