Champion 22kW fleX
#2 in 15 to 22 kWFull review
For coastal or wet climates that want Champion’s 22 kW and long warranty in a rust-proof aluminum housing.
Amazon $6,399$6,399
4.2/5
For homes with central air that want whole-house backup for the least money and a long parts warranty.
- 22 kWPropane
- 19.8 kWNatural gas
- Included, 200 ATransfer switch
- 10 yearsWarranty
Check price at Norwall$5,699
Price checked November 1, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- One of the lowest prices per kW for a 22 kW kit with a whole-house switch
- 10-year warranty, the longest here
- Runs most homes with central air
Cons
- No remote monitoring out of the box
- Big and heavy at 634 lb, larger than Generac’s 22 kW
- Labor is covered only for the first 2 years
The Champion aXis family
Every Champion aXis model we rank, smallest first. Ratings compare each against its own size.
| Model | Propane | Rating | Price |
|---|---|---|---|
| Champion 14kW aXis | 14 kW | 4.2/5 | $4,999 |
| Champion 22kW aXis (this one) | 22 kW | 4.2/5 | $5,699 |
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
Specifications
| Model number | 201222 |
|---|---|
| Output | |
| Rated output, propane | 22 kW |
| Rated output, natural gas | 19.8 kW |
| THD | Under 5% |
| Engine | 999 cc |
| Engine speed | 3,600 rpm |
| Install | |
| Transfer switch | Included, 200 A |
| Load management | No |
| Remote monitoring | No |
| Enclosure | Steel |
| Dimensions | 54 x 30.3 x 43.9 in |
| Weight | 634.3 lb |
| Noise and warranty | |
| Noise, normal operation | 67 dBA |
| Warranty | 10 years |
Alternatives in this size
Briggs & Stratton PowerProtect+ 22kW
#3 in 15 to 22 kWFull review
For homes with central air on natural gas that want full output, built-in monitoring and seven years of full cover.
Norwall $7,289 Signature Solar $7,289$7,289
Generac 22kW Standby 7325
#4 in 15 to 22 kWFull review
For typical homes with central air that want the best known brand and a whole-house switch in the box.
Amazon $6,506.10$6,506.10
Compare
Compare the Champion 22kW aXis with any other standby generator →
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