Champion 12.5kW Home Standby
#1 in Under 15 kWFull review
For homes that want essentials backed up automatically at a low price and a long parts warranty.
Norwall $4,199$4,199
The Champion 12.5kW Home Standby is the better standby generator overall, rated 4.3 to 3.5. The Champion 12.5kW Home Standby leads on warranty and value. The Generac 10kW Standby 7321 wins on noise. The Generac 10kW Standby 7321 costs $302.90 less ($3,896.10 vs $4,199).
Generac 10kW Standby 7321
#4 in Under 15 kWFull review
For smaller homes that only need the fridge, furnace, well pump and lights during an outage, at a low price.
Amazon $3,896.10$3,896.10
Prices were last checked November 1, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Champion 12.5kW Home Standby for warranty (10-year warranty vs 5-year warranty) and value ($336 per kW ($4,199 with transfer switch, 12.5 kW on propane) vs $390 per kW ($3,896 with transfer switch, 10 kW on propane)).
- Choose the Generac 10kW Standby 7321 for noise (61 dBA rated in normal operation vs 63 dBA rated in normal operation).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every under 15 kw standby generator; a clear win is highlighted. How we rank explains each one.
| Factor weight | Champion 12.5kW Home Standby | Generac 10kW Standby 7321 |
|---|---|---|
| Overall rating | 4.3/5 | 3.5/5 |
| Value 35% | 57 $336 per kW ($4,199 with transfer switch, 12.5 kW on propane) | 36 $390 per kW ($3,896 with transfer switch, 10 kW on propane) |
| Transfer switch 15% | 100 includes a 100 A transfer switch | 100 includes a 100 A transfer switch |
| Noise 15% | 75 63 dBA rated in normal operation | 92 61 dBA rated in normal operation |
| Power quality 10% | 83 under 5% THD | 83 under 5% THD |
| Warranty 25% | 100 10-year warranty | 29 5-year warranty |
Specifications
| Champion 12.5kW Home Standby | Generac 10kW Standby 7321 | |
|---|---|---|
| Output | ||
| Rated output, propane | 12.5 kW | 10 kW |
| Rated output, natural gas | 11 kW | 9 kW |
| THD | Under 5% | Under 5% |
| Engine | 717 cc | 459 cc |
| Engine speed | 3,600 rpm | 3,600 rpm |
| Install | ||
| Transfer switch | Included, 100 A | Included, 100 A |
| Load management | No | No |
| Remote monitoring | No | Yes |
| Enclosure | Steel | Aluminum |
| Dimensions | 49 x 28 x 28 in | 46.4 x 26.3 x 30.7 in |
| Weight | 425.5 lb | 344 lb |
| Noise and warranty | ||
| Noise, normal operation | 63 dBA | 61 dBA |
| Noise, weekly self-test | - | 49 dBA |
| Warranty | 10 years | 5 years |
| Released | - | 2025 |