Champion 14kW aXis
#2 in Under 15 kWFull review
For budget buyers who want a whole-house switch and a long warranty for essentials and a small air conditioner.
Norwall $4,999$4,999
3.5/5
For smaller homes that only need the fridge, furnace, well pump and lights during an outage, at a low price.
- 10 kWPropane
- 9 kWNatural gas
- Included, 100 ATransfer switch
- 5 yearsWarranty
Check price at Amazon$3,896.10
Price checked November 1, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Among the cheapest ways into a permanent standby system
- Quiet 61 dBA running and 49 dBA weekly test, easy on neighbors
- Cellular remote monitoring works without your home Wi-Fi
Cons
- Limited-circuit 100 A switch, so you pick a set of circuits rather than backing up the whole panel
- Too small for central air
- Amazon shows a long lead time
The Generac Air-Cooled Standby (2025) family
Every Generac Air-Cooled Standby (2025) model we rank, smallest first. Ratings compare each against its own size.
| Model | Propane | Rating | Price |
|---|---|---|---|
| Generac 10kW Standby 7321 (this one) | 10 kW | 3.5/5 | $3,896.10 |
| Generac 14kW Standby 7323 | 14 kW | 3.4/5 | $5,255.10 |
| Generac 18kW Standby 7324 | 18 kW | 3.2/5 | $5,975.10 |
| Generac 22kW Standby 7325 | 22 kW | 3.4/5 | $6,506.10 |
| Generac 24kW Standby 7326 | 24 kW | 3.2/5 | $6,875.10 |
| Generac 26kW Standby 7328 | 26 kW | 3.2/5 | $7,253.10 |
| Generac 28kW Standby 7329 | 28 kW | 3.1/5 | $8,387.10 |
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
Specifications
| Model number | 7321 (G007321-0) |
|---|---|
| Output | |
| Rated output, propane | 10 kW |
| Rated output, natural gas | 9 kW |
| THD | Under 5% |
| Engine | 459 cc |
| Engine speed | 3,600 rpm |
| Install | |
| Transfer switch | Included, 100 A |
| Load management | No |
| Remote monitoring | Yes |
| Enclosure | Aluminum |
| Dimensions | 46.4 x 26.3 x 30.7 in |
| Weight | 344 lb |
| Noise and warranty | |
| Noise, normal operation | 61 dBA |
| Noise, weekly self-test | 49 dBA |
| Warranty | 5 years |
| Released | 2025 |
Alternatives in this size
Champion 8.5kW Home Standby
#3 in Under 15 kWFull review
For small homes or cabins that need a few essential circuits backed up automatically on a tight budget.
Norwall $3,299$3,299
Generac 14kW Standby 7323
#5 in Under 15 kWFull review
For homes that want essentials and a small air conditioner covered, with Generac’s cellular monitoring.
Amazon $5,255.10$5,255.10
Compare
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