Generac standby generators: all 7 sizes
Side by side
Generac rates each generator for propane (LP) and natural gas (NG). Sound is measured at 23 feet during normal operation.
| Size | Model | Propane | Natural gas | Engine | Sound |
|---|---|---|---|---|---|
| 10 kW | 7257 | 10 kW | 9 kW | G-Force 400 | 61 dBA |
| 14 kW | 7258 | 14 kW | 14 kW | G-Force 800 | 65 dBA |
| 18 kW | 7259 | 18 kW | 17 kW | G-Force 800 | 65 dBA |
| 22 kW | 7260 | 22 kW | 21 kW | G-Force 1000 | 67 dBA |
| 24 kW | 7261 | 24 kW | 22.5 kW | G-Force 1000 | 67 dBA |
| 26 kW | 7327 | 26 kW | 24 kW | G-Force 1000 | 67 dBA |
| 28 kW | 7282 | 28 kW | 25 kW | G-Force 1000 | 67 dBA |
Specs from Generac's air-cooled standby generator spec sheets (Rev D, August 2026). Ratings are Generac's maximum power ratings and drop at high temperatures and altitudes. Generac may update its specs, so check Generac's site for the latest.
Find your size
Generac 10 kW
A good match when you mainly want the essentials covered: the fridge, lights, Wi-Fi, a sump pump and similar loads.
See detailsGenerac 14 kW
Often chosen to cover the essentials with room for more, depending on your A/C and appliances.
See detailsGenerac 18 kW
Often a fit for covering much of an average home, depending on your A/C units and whether your appliances are gas or electric.
See detailsGenerac 22 kW
Often chosen for whole-home coverage in many homes, especially with gas appliances.
See detailsGenerac 24 kW
For larger homes, more A/C, or more electric appliances.
See detailsGenerac 26 kW
For larger homes and heavier electrical loads.
See detailsGenerac 28 kW
For the largest homes and the most electrical load in the air-cooled lineup.
See detailsBigger isn't always better
The biggest loads in most Atlanta homes are the A/C units and any electric heat, range, dryer or water heater. James looks at those, checks your panel, and asks what you want running when the power goes out.
Then he recommends the size that fits, so you don't pay for more generator than you need. Read: what size generator does a 3,000 sq ft house need?
- A/C units and heat pumps
- Electric range, dryer and water heater
- Well, sump and pool pumps
- Medical equipment
- Whole house or just the essentials
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