Head to head · 2026
Generac Guardian 24kW (with 200A ATS) vs Champion 12.5kW Home Standby (with 100A ATS)
Contender A
Generac Guardian 24kW (with 200A ATS)
Best OverallThe best-selling home standby in America: whole-home power, WiFi monitoring, 10-second automatic transfer.
~$6,875 typical price
Buy on AmazonContender B
Champion 12.5kW Home Standby (with 100A ATS)
Budget PickAutomatic essential-circuit backup at the lowest credible price in the category — switch included.
~$4,399 typical price
Buy on AmazonOur verdict
Whole-home versus essentials, automatic edition. The Generac 24kW runs the entire house without thinking; the Champion 12.5kW runs the circuits that matter for roughly $2,500 less before install. If central AC during outages is a requirement, the Generac is the answer — if 'fridge, furnace, well, and lights, automatically' is the requirement, the Champion does it for less.
Pick the Generac if…
- ✓Whole-home coverage including AC
- ✓Larger homes and bigger loads
- ✓Maximum resale-friendly install
Pick the Champion if…
- ✓Essential circuits are the actual requirement
- ✓Budget-conscious automatic backup
- ✓Longest warranty in the category
Spec by spec
| Spec | Generac Guardian 24kW (with 200A ATS) | Champion 12.5kW Home Standby (with 100A ATS) |
|---|---|---|
| Our score | 9.2 / 10 | 8.4 / 10 |
| Rated power | 24kW (LP) / 21kW (NG) | 12.5kW (LP) / 11kW (NG) |
| Fuel | Natural gas or propane | Natural gas or propane |
| Engine | 999cc G-Force V-twin | 717cc Champion V-twin |
| Transfer switch | 200A ATS (pair; often bundled) | 100A / 200A options |
| Noise | ~67 dBA @ 23 ft | ~63 dBA @ 23 ft |
| Monitoring | Mobile Link WiFi | — |
| Self-test | Weekly, quiet mode | Weekly Quiet Test |
| Warranty | 5-year limited | 10-year limited |
| Cold start | — | Rated to −22°F |
Still deciding?
Read the full reviews for the complete story, or check both current prices — sale pricing swings this class of decision all the time.
~$6,875 typical price
Buy on Amazon~$4,399 typical price
Buy on Amazon