Standby generator installation cost (2026)
Most published 2026 ranges for an installed whole-home standby generator, including the unit and transfer switch, land around $8,000–$16,000.
Average installed, including generator, equipment and installation.
Air-cooled unit, automatic transfer switch, short gas run, pad, permit. National spread $5,000–$30,000.
What pushes a quote up
- A liquid-cooled or larger unit
- A long gas line, a gas meter upgrade, or a new propane tank
- A panel or service upgrade forced by the transfer switch
- Trenching or boring under a driveway
Cost drivers per ushomecosts.com, as of 2026-10-26.
Generator or battery?
EnergySage reports a typical installed whole-home battery (~13.5 kWh) at about $15,647. A battery needs no fuel, but covers fewer hours. Battery costs → · What size do I need? →
Not sure you need a standby unit? A portable generator with an inlet and interlock, or a portable power station, costs less. See transfer switch vs interlock kit.
Next: how to compare quotes · questions to ask an installer
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FAQ
How much does it cost to install a standby generator?
Generac puts the average installed cost at $8,000–$16,000, including the generator, equipment and installation (checked 2026-10-26). Long gas runs, larger liquid-cooled units, and panel upgrades push it higher.
Does the price include the transfer switch?
Most published installed ranges include an automatic transfer switch. Confirm it is itemized on your quote.
Is there a federal tax credit for a standby generator?
We have not found a federal tax credit for home standby generators. The battery credit (25D) ended for installs completed after 12/31/2025.
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