by Champion
Champion 22kW Whole House (100A Switch, aXis)
22 kW standby generator
Key specifications
- Rated output, propane
- 22 kW
- Rated output, natural gas
- 19.8 kW
- Fuel
- Dual fuel (NG / LP)
- Phase
- Single-phase
- Transfer switch amps
- 100 A
- Transfer switch
- Included
- Dimensions
- 54 x 30.3 x 43.9 in
- Weight
- 632.5 lb
- Engine displacement
- 999 cc
- Sound, running (23 ft)
- 67 dB
- Warranty
- 10 years
Unverifiable specs are omitted, not estimated. See sources below for what we can defend.
Fuel use
| Fuel | Half load | Full load |
|---|---|---|
| Propane | 2 gal/hr | 3.6 gal/hr |
| Natural gas | 173.4 ft³/hr | 270.2 ft³/hr |
On propane, a 500-gallon tank filled to 80% holds about 400 gallons. That runs the Champion 22kW Whole House (100A Switch, aXis) for about 200 hours (8.3 days) nonstop at half load, or about 111 hours (4.6 days) at full load. See how much propane a generator uses for other tank sizes.
On natural gas, the gas line and meter have to deliver the full-load figure, 270.2 ft³/hr, even if the generator rarely runs that hard. Installers size the pipe to it.
Sources
Every spec above traces back to one of these citations.
- Champion product page — 22kW Whole House 100A Switch aXis (Model 201220) · checked July 2026
- Champion product page: 22kW Whole House 100A Switch aXis (Model 201220) (specifications table) · checked September 2026
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