Generac 22kW Standby 7325
#4 in 15 to 22 kWFull review
For typical homes with central air that want the best known brand and a whole-house switch in the box.
Amazon $6,506.10$6,506.10
3.2/5
For homes with central air that want a quiet 20 kW unit with monitoring included and a service-entrance switch in the box.
- 20 kWPropane
- 18 kWNatural gas
- Included, 200 ATransfer switch
- 5 yearsWarranty
Check price at Norwall$6,662.42
Price checked November 1, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Runs most homes with central air through the included 200 A service-entrance switch
- Remote monitoring built in
- Quiet 65 dBA at 23 ft for a 20 kW unit
Cons
- Load management needs a separate accessory
- Heavy at 596 lb
- Transfer switch warranty is only 2 years
The Cummins Quiet Connect family
Every Cummins Quiet Connect model we rank, smallest first. Ratings compare each against its own size.
| Model | Propane | Rating | Price |
|---|---|---|---|
| Cummins Quiet Connect RS13A 13kW | 13 kW | 3.2/5 | $5,384.39 |
| Cummins Quiet Connect RS17A 17kW | 17 kW | 3.0/5 | $6,264.97 |
| Cummins Quiet Connect RS20AC 20kW (this one) | 20 kW | 3.2/5 | $6,662.42 |
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 | RS20AC |
|---|---|
| Output | |
| Rated output, propane | 20 kW |
| Rated output, natural gas | 18 kW |
| THD | Under 5% |
| Engine | 999 cc |
| Engine speed | 3,600 rpm |
| Install | |
| Transfer switch | Included, 200 A |
| Load management | No |
| Remote monitoring | Yes |
| Enclosure | Aluminum |
| Dimensions | 34.1 x 36.0 x 27.3 in |
| Weight | 596 lb |
| Noise and warranty | |
| Noise, normal operation | 65 dBA |
| Warranty | 5 years |
Alternatives in this size
Generac 18kW Standby 7324
#5 in 15 to 22 kWFull review
For average homes with one central air conditioner that want a whole-house switch included.
Amazon $5,975.10$5,975.10
Briggs & Stratton PowerProtect+ 18kW
#7 in 15 to 22 kWFull review
For average homes on natural gas that want full rated output and a long warranty with service included.
Norwall $6,899$6,899
Compare
Compare the Cummins Quiet Connect RS20AC 20kW with any other standby generator →
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