Last updated: March 2026

22kW aXis

Power: 22kW LP / 19.8kW NG
Installed Cost: $12,000–$17,000
Noise: 67 dB
Weight: 633 lbs
Warranty: 10 years
Fuel: Dual-fuel (NG/LP)

Best for: 2,500–3,500 sq ft on a budget. 10-year warranty, ATS included, highest-rated by owners among brands we compared.

Get Free Quotes for the 22kW aXis

The Champion 22kW aXis is the largest standby from a brand built on value and warranty. At $6,299 with ATS included, it's $680 less than the equivalent Generac bundle with double the warranty coverage.

What This Generator Keeps Running

On propane (22 kW) with aXis load management: 3-4 ton AC, full kitchen, refrigerator, freezer, furnace, sump/well pump, home office, all lighting, CPAP.

Limitations: Same limitations as any 22kW. EV charger + 5-ton AC simultaneously. On NG (19.8 kW), essentially identical to Generac 22kW on NG (19.5).

What It Actually Costs

Unit price

$6,299

Installed

$12,000–$17,000

$6,299 with ATS: $680 less than the Generac 22kW + ATS bundle ($6,979). Three ATS configurations (100A/150A/200A) at the same price.

Get Free Quotes for the 22kW aXis

Get Free Quotes Not Sure on Size?

30 seconds. No phone call. No commitment.

How Loud Is It?

67 dB: identical to Generac 22kW. The 14kW aXis runs at 62 dB; the jump to 67 at 22kW is significant within Champion's own lineup.

How Big Is It?

54" × 30.3" × 43.9" noticeably larger than any other 22kW. 633 lbs. Verify setback zone before ordering.

Maintenance

Champion 999cc V-Twin. Annual service. Free lifetime tech support helps fill documentation gaps.

Pros & Cons

The Champion case

✓10-year generator warranty: double the industry standard
✓$6,299 with ATS: $680 less than comparable Generac bundle
✓aXis 4-priority load management built into ATS
✓633 lbs: substantial construction
✓Free lifetime tech support
✓Three ATS configurations at same price
✓Based on reviews, highest-rated among brands we compared (3.6/5 on PissedConsumer)

The gaps

✗No remote monitoring; same gap as every Champion
✗Largest physical footprint in the 22kW class: may not fit tight setback zones
✗2-year ATS warranty vs 10-year generator warranty
✗19.8 kW on NG: standard derating
✗Transfer switch quality concerns
✗Smaller service network

Frequently Asked Questions

Is the Champion 22kW worth it?▾

If the 10-year warranty swings your decision, yes: $1,000+ of coverage Generac charges extra for, on a unit that costs $680 less with ATS. If remote monitoring matters, no. every other brand includes it.

How big is the Champion 22kW compared to Generac?▾

54" × 30" × 44" vs Generac's 48" × 25" × 29". Six inches longer, 5 inches wider, 15 inches taller. At 633 lbs vs 466 lbs, it's 167 lbs heavier. Verify your installation site.

Does the Champion 22kW have an app?▾

No. The aXis Wi-Fi Direct is local-only for installer configuration. No cloud app, no remote status, no outage notifications.

Get Pricing for Your Home

Connect with licensed installers in your area.

Get Free Quotes for the 22kW aXis

30 seconds. No phone call. No commitment.

Based on verified specs. OffGrid Compare is independent: no brand deals, no manufacturer affiliations. Why we built this →