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 $4,329$4,329
The Generac 10kW Standby 7321 is the better standby generator overall, rated 3.3 to 3.0. The Generac 10kW Standby 7321 leads on noise. The Kohler 12RESVL 12kW wins on value. The Generac 10kW Standby 7321 costs $399 less ($4,329 vs $4,728).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Kohler 12RESVL 12kW
#8 in Under 15 kWFull review
For smaller homes that want a well pump or a small air conditioner on top of the essentials, with Kohler’s full-coverage warranty.
Norwall $4,728$4,728
Which should you buy?
- Choose the Generac 10kW Standby 7321 for noise (61 dBA rated in normal operation vs 71 dBA rated in normal operation).
- Choose the Kohler 12RESVL 12kW for value ($394 per kW ($4,728 with transfer switch, 12 kW on propane) vs $433 per kW ($4,329 with transfer switch, 10 kW on propane)).
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 | Generac 10kW Standby 7321 | Kohler 12RESVL 12kW |
|---|---|---|
| Overall rating | 3.3/5 | 3.0/5 |
| Value 35% | 21 $433 per kW ($4,329 with transfer switch, 10 kW on propane) | 34 $394 per kW ($4,728 with transfer switch, 12 kW on propane) |
| Transfer switch 15% | 100 includes a 100 A transfer switch | 100 includes a 100 A transfer switch |
| Noise 15% | 92 61 dBA rated in normal operation | 8 71 dBA rated in normal operation |
| Power quality 10% | 83 under 5% THD | 83 under 5% THD |
| Warranty 25% | 29 5-year warranty | 29 5-year warranty |
Specifications
| Generac 10kW Standby 7321 | Kohler 12RESVL 12kW | |
|---|---|---|
| Output | ||
| Rated output, propane | 10 kW | 12 kW |
| Rated output, natural gas | 9 kW | 11 kW |
| THD | Under 5% | Under 5% |
| Engine | 459 cc | 725 cc |
| Engine speed | 3,600 rpm | 3,600 rpm |
| Install | ||
| Transfer switch | Included, 100 A | Included, 100 A |
| Load management | No | No |
| Remote monitoring | Yes | Yes |
| Enclosure | Aluminum | Steel |
| Dimensions | 46.4 x 26.3 x 30.7 in | 30.6 x 28 x 32.4 in |
| Weight | 344 lb | 433 lb |
| Noise and warranty | ||
| Noise, normal operation | 61 dBA | 71 dBA |
| Noise, weekly self-test | 49 dBA | 67 dBA |
| Warranty | 5 years | 5 years |
| Released | 2025 | - |