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Generator Installation in California

Standby & whole house generator installation. Serving every city in California with upfront pricing and 24/7 response.

(833) 652-8933Request a quote

Generator Installation includes

  • Whole house standby generator installation
  • Generac, Kohler and Briggs & Stratton
  • Automatic transfer switch installation
  • Manual transfer switch & inlet box
  • Generator sizing & load calculation
Call (833) 652-8933

Public Safety Power Shutoffs, wildfire season and winter storms make backup power a practical need in California. Phasethree Electric installs whole house standby generators, Generac and Kohler systems, automatic transfer switches and manual transfer switches with portable generator inlets for homes and small businesses in California and across every County.

Standby generator installation

We size the generator to your real loads, pour or set the pad, run the electrical connection to a transfer switch at your panel, coordinate the gas or propane connection, pull the permit and start up and test the unit. Automatic units start within seconds of an outage.

Portable generator inlets and manual transfer switches

If a full standby system is more than you need, a manual transfer switch and outdoor inlet lets you safely power selected circuits from a portable generator without extension cords through windows.

Generator service in California

We also service and repair existing generators, replace batteries, and add load management modules so a smaller unit can run more of the house. Call (833) 652-8933 for California and nearby Los Angeles, San Diego, San Jose, San Francisco.

Generator Installation services

  • Whole house standby generator installation
  • Generac, Kohler and Briggs & Stratton
  • Automatic transfer switch installation
  • Manual transfer switch & inlet box
  • Generator sizing & load calculation
  • Permits and inspection
  • Generator repair & maintenance
  • Battery backup integration

Generator Installation by city

We have a dedicated generator installation page for every California city. Popular locations:

Find your city

Frequently asked questions

What size generator does a California home need?

Most homes need 14 to 26 kW for whole house coverage. We run a load calculation so you are not overpaying.

How long does installation take?

Electrical work is usually one day. Total time depends on gas connection and permit scheduling in California.

Do standby generators need maintenance?

Yes, an annual service with oil, filter and a load test keeps the warranty valid and the unit reliable.

Reviews

★★★★★

“Quoted me a firm price for recessed lighting in the kitchen and living room and the invoice matched to the dollar. Lights look fantastic.”

James O.
★★★★★

“Whole house surge protector installed in under an hour. Peace of mind after the last PSPS event fried our garage opener.”

Ellen T.
★★★★★

“Installed a Generac standby generator for wildfire season. Explained every step and the load management so we could use a smaller unit.”

Chris B.

Book generator installation anywhere in California

(833) 652-8933

Upfront pricing · Same-day service · 24/7 emergency response

📞 Call (833) 652-8933