How Much Does a Generac Generator Cost?
What a Generac generator costs — unit and installed pricing for the Guardian home standby line-up by kW, plus portable prices, and what installation adds all-in.
Generac is the best-known name in US home standby, so it’s the price most buyers benchmark against. A Generac home standby generator costs about $2,000–$6,000 for the unit and roughly $8,000–$13,000 installed. Generac portable generators run from a few hundred dollars to about $2,000. Here’s the breakdown by model size.
Generac generator cost by size
| Generac model | Unit only | Installed (all-in) |
|---|---|---|
| Guardian 10 kW | $2,000–$2,600 | $6,500–$9,500 |
| Guardian 14 kW | $3,200–$4,000 | $7,500–$11,000 |
| Guardian 18 kW | $3,800–$4,600 | $8,000–$12,000 |
| Guardian 22 kW | $4,500–$5,500 | $9,000–$13,000 |
| Guardian 24 kW | $5,000–$6,500 | $10,000–$14,000 |
What’s included — and what moves the price
The installed figures above include the unit, the automatic transfer switch, installation labor, the gas or propane hookup and the permit. Two identical Generac units can still differ by thousands to install, depending on how far the pad sits from the electrical panel and gas meter, whether the gas line or electrical panel needs upsizing, local permit fees and site access.
Is Generac worth the price?
Generac’s value is the widest US line-up and the largest dealer and installer network, which keeps parts and service easy to get. On raw build quality, Kohler and Cummins compete closely — see how they stack up on the best whole house generators page, and read the full Generac brand overview.
Price your exact setup with the cost estimator, and size it first with the sizing calculator.
gennyguide is independent and not affiliated with Generac. Prices are 2026 planning estimates and vary by model, region and site — confirm with a Generac dealer. As an Amazon Associate we earn from qualifying purchases.
Frequently asked questions
How much does a Generac generator cost?
A Generac home standby generator costs about $2,000–$6,000 for the unit — a 10 kW is near $2,000–$2,500, an 18 kW around $4,000, and a 22–24 kW Guardian $4,500–$6,000. Installed, expect roughly $8,000–$13,000 all-in once you add the transfer switch, labor, fuel hookup and permit. Generac portable generators run from a few hundred dollars to about $2,000. Use the estimator to price your kW and install.
How much is a Generac 24kW generator installed?
A Generac 24 kW Guardian unit is about $5,000–$6,500, and roughly $10,000–$14,000 installed after the automatic transfer switch, installation labor, gas hookup and permit. The 24 kW is a common pick for larger homes or those running multiple AC units. A long run or a new propane tank pushes it toward the top of that range.
Why does Generac install cost vary so much?
Two identical Generac units can differ by thousands to install depending on how far the pad is from the electrical panel and gas meter, whether the gas line needs upsizing, if the electrical panel needs an upgrade, local permit fees, and site access for the pad. Getting several itemized dealer quotes is the only way to pin down your number — start with the estimator, then compare quotes.