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Generac 14 kW home standby generator
The Short AnswerThe Generac 14 kW air-cooled home standby generator (model 7258) is rated at 14 kW on propane and 14 kW on natural gas. A step up for essentials plus comfort in the lineup we install. Southern Power Generators installs it with an automatic transfer switch across metro Atlanta, and James Hill, a licensed Master Electrician, confirms it's the right size for your home first.
14 kWon propane
14 kWon natural gas
65 dBAat 23 ft, running
5 yearsGenerac limited warranty
Is it the right size?
A step up for essentials plus comfort
Often chosen to cover the essentials with room for more, depending on your A/C and appliances.
Every home is different. The number of A/C units, electric appliances and pumps all change the answer, so James confirms the size on a free site visit before you decide.
| Generac model | 7258 (generator) |
| Rated output, propane | 14 kW |
| Rated output, natural gas | 14 kW |
| Engine | Generac G-Force 800, 817 cc |
| Sound at 23 ft, normal operation | 65 dBA |
| Sound at 23 ft, quiet weekly test | 55 dBA |
| Size (L x W x H) | 46.4 x 26.3 x 30.7 in |
| Weight | About 391 lb |
| Fuel use at full load | 243 cu ft/hr natural gas · 2.92 gal/hr propane |
| Monitoring | Cellular connectivity with Generac's Mobile Link app |
| Generac warranty | 5-year limited |
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. See it on Generac.com.
Questions about the 14 kW
Your generator questions, answered
What can a 14 kW generator run?
Often chosen to cover the essentials with room for more, depending on your A/C and appliances. The real answer depends on your home, so James sizes it on the free site visit.
How much does a 14 kW Generac cost installed?
Every home is different. The price depends on the generator size, how far it sits from your gas meter and electrical panel, whether you need a propane tank, any panel work, and what your permit requires. After a free site visit, James gives you a written estimate that spells out the equipment, installation and extras. No hidden fees and no pressure.
Does the 14 kW run on natural gas or propane?
Both. Generac rates it at 14 kW on propane and 14 kW on natural gas.
Does it come with a transfer switch?
Every standby generator we install comes with an automatic transfer switch, matched to your panel.
Get a generator quote
Ready before the next storm?
Tell us a little about your home and we'll call or text you to set up a free site visit.
Call or text404-593-6308
Emailjames@southernpg.com
Office2637 White Oak Dr, Decatur, GA 30032
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