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
The Generac 10kW Standby 7321 is the better standby generator overall, rated 3.5 to 3.2. The Generac 10kW Standby 7321 leads on noise and value. The Generac 10kW Standby 7321 costs $1,488.29 less ($3,896.10 vs $5,384.39).
Cummins Quiet Connect RS13A 13kW
#6 in Under 15 kWFull review
For homes on natural gas that want essentials covered by a quiet, well supported brand with monitoring included.
Norwall $5,384.39$5,384.39
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 Generac 10kW Standby 7321 for noise (61 dBA rated in normal operation vs 65 dBA rated in normal operation) and value ($390 per kW ($3,896 with transfer switch, 10 kW on propane) vs $414 per kW ($5,384 with transfer switch, 13 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 | Cummins Quiet Connect RS13A 13kW |
|---|---|---|
| Overall rating | 3.5/5 | 3.2/5 |
| Value 35% | 36 $390 per kW ($3,896 with transfer switch, 10 kW on propane) | 27 $414 per kW ($5,384 with transfer switch, 13 kW on propane) |
| Transfer switch 15% | 100 includes a 100 A transfer switch | 100 includes a 200 A transfer switch |
| Noise 15% | 92 61 dBA rated in normal operation | 58 65 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 | Cummins Quiet Connect RS13A 13kW | |
|---|---|---|
| Output | ||
| Rated output, propane | 10 kW | 13 kW |
| Rated output, natural gas | 9 kW | 13 kW |
| THD | Under 5% | Under 5% |
| Engine | 459 cc | 999 cc |
| Engine speed | 3,600 rpm | 3,600 rpm |
| Install | ||
| Transfer switch | Included, 100 A | Included, 200 A |
| Load management | No | No |
| Remote monitoring | Yes | Yes |
| Enclosure | Aluminum | Aluminum |
| Dimensions | 46.4 x 26.3 x 30.7 in | 34.1 x 36.0 x 27.3 in |
| Weight | 344 lb | 479 lb |
| Noise and warranty | ||
| Noise, normal operation | 61 dBA | 65 dBA |
| Noise, weekly self-test | 49 dBA | - |
| Warranty | 5 years | 5 years |
| Released | 2025 | - |