Champion aXis 22kW vs Generac Guardian 18kW
What is the difference?
The Champion aXis 22kW has 22 kW of running power. The Generac Guardian 18kW has 18 kW of running power.
Both are dual-fuel.
The Champion aXis 22kW weighs 633 lb, the Generac Guardian 18kW weighs 425 lb. The Generac Guardian 18kW is easier to carry.
The Champion aXis 22kW has a 10-year warranty, the Generac Guardian 18kW has a 5-year warranty.
Specs side by side
| Champion aXis 22kW | Generac Guardian 18kW | |
|---|---|---|
| Running W | 22000 | 18000 |
| Peak W | — | — |
| Fuel | dual-fuel | dual-fuel |
| Tank (gal) | — | — |
| Run time @50 % (h) | — | — |
| Noise (dB) | 67 | — |
| CO shutoff | — | — |
| Weight (lb) | 633 | 425 |
| Warranty (yr) | 10 | 5 |
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Specs as read from manufacturer pages on 2026-10-25 / 2026-10-25. Specs one maker does not list are left out of the comparison. Sponsored links; we may earn a commission.
Common questions
Which has more running watts, Champion aXis 22kW or Generac Guardian 18kW?
The Champion aXis 22kW. More running watts: 22000 W vs 18000 W.
Which is lighter, Champion aXis 22kW or Generac Guardian 18kW?
The Generac Guardian 18kW. Lighter: 425 lb vs 633 lb.
Which has the longer warranty, Champion aXis 22kW or Generac Guardian 18kW?
The Champion aXis 22kW. Longer warranty: 10 years vs 5 years.
More comparisons
- Champion aXis 22kW vs Generac Guardian 24kW
- Champion aXis 22kW vs Generac Guardian 26kW
- Generac Guardian 18kW vs Champion aXis 14kW
- Generac Guardian 18kW vs Champion 22 kW fleX Home Standby (201016)
Compare other models → · All Champion models · All Generac models