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
The Generac 22kW Standby 7325 is the better standby generator overall, rated 3.4 to 3.2. The Generac 22kW Standby 7325 leads on value. The Generac 18kW Standby 7324 wins on noise. The Generac 18kW Standby 7324 costs $531 less ($5,975.10 vs $6,506.10).
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
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 22kW Standby 7325 for value ($296 per kW ($6,506 with transfer switch, 22 kW on propane) vs $332 per kW ($5,975 with transfer switch, 18 kW on propane)).
- Choose the Generac 18kW Standby 7324 for noise (65 dBA rated in normal operation vs 67 dBA rated in normal operation).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 15 to 22 kw standby generator; a clear win is highlighted. How we rank explains each one.
| Factor weight | Generac 22kW Standby 7325 | Generac 18kW Standby 7324 |
|---|---|---|
| Overall rating | 3.4/5 | 3.2/5 |
| Value 35% | 47 $296 per kW ($6,506 with transfer switch, 22 kW on propane) | 29 $332 per kW ($5,975 with transfer switch, 18 kW on propane) |
| Transfer switch 15% | 100 includes a 200 A transfer switch | 100 includes a 200 A transfer switch |
| Noise 15% | 42 67 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 22kW Standby 7325 | Generac 18kW Standby 7324 | |
|---|---|---|
| Output | ||
| Rated output, propane | 22 kW | 18 kW |
| Rated output, natural gas | 21 kW | 17 kW |
| THD | Under 5% | Under 5% |
| Engine | 997 cc | 817 cc |
| Engine speed | 3,600 rpm | 3,600 rpm |
| Install | ||
| Transfer switch | Included, 200 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 | 46.4 x 26.3 x 30.7 in |
| Weight | 451 lb | 426 lb |
| Noise and warranty | ||
| Noise, normal operation | 67 dBA | 65 dBA |
| Noise, weekly self-test | 55 dBA | 55 dBA |
| Warranty | 5 years | 5 years |
| Released | 2025 | 2025 |