*The Angi rating for Generator Install companies in O Fallon, MO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.
*The HomeAdvisor rating for Generator Install companies in O Fallon, MO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.
Last update on February 14, 2026
Serving O Fallon, MO and surrounding areas
Approved
In business since 1976
Free estimates
Emergency services offered
"Very quick and courtious installers. They answered my questions even on other projects they were not working on at the time."
Serving O Fallon, MO and surrounding areas
Approved
In business since 2004
Free estimates
Emergency services offered
"Great job. I would definitely hire again."
+7
Serving O Fallon, MO and surrounding areas
Approved
Super Service Award Winner
In business since 2023
Free estimates
Emergency services offered
"Did a great job with repair and installation"
+18
Serving O Fallon, MO and surrounding areas
Approved
In business since 1945
Free estimates
Warranties offered
"We highly recommend JBathe Electric. They were very knowledgeable and professional! They were very reasonably priced! From the office staff to the installers the customer service was superb!"
+20
Serving O Fallon, MO and surrounding areas
Approved
Super Service Award Winner
In business since 2021
Emergency services offered
Warranties offered
"I am happy to share this review about Steven. He assisted Anthony with the installation of a new electrical panel, smoke and carbon monoxide detectors, and ceiling light fixtures. Steven was very conscientious and skillful. He was a pleasure to work with and was very respectful of my home by keeping the job site very clean. I feel confident that the work performed by Steven was to the highest level of quality standards."
+2
Serving O Fallon, MO and surrounding areas
Approved
In business since 2011
Free estimates
Emergency services offered
With over 20 years of experience, we’re a licensed, family-owned electrician proudly serving Warrenton and the surrounding areas—including St. Louis, St. Charles, Warren, and Franklin Counties. From expert electrical repairs to new home build wiring and generator installation, we bring dependable service, quality craftsmanship, and peace of mind to every job. Fully licensed in the state of Missouri and St. Charles County, we’re here to power your home or business with skill and care you can trust.
Serving O Fallon, MO and surrounding areas
Approved
Super Service Award Winner
In business since 2024
Emergency services offered
Small jobs welcome
"Great job. Had correct material and did the install with no problems."
+1
Serving O Fallon, MO and surrounding areas
Approved
In business since 2012
Free estimates
Credit card accepted
"Mike is extremely knowledgeable in the electric charging station installation, as well as working with the electric supplier to ensure correct voltage and location of station will be correctly placed. Mike's customer service is excellent along with his timely manner of completing the project."
Serving O Fallon, MO and surrounding areas
Approved
In business since 1993
Free estimates
Emergency services offered
"Installed a back-up sump pump. Great job! Thank you!"
+3
Serving O Fallon, MO and surrounding areas
Approved
Super Service Award Winner
In business since 2011
Free estimates
Emergency services offered
"It went great, I was selling my house and some electrical work was needed after the inspector flagged some things and closing date was coming quick. I got a hold of Jeff and he came to the house and said no problem we can take care of it. Very happy with the work that was done."
From average costs to expert advice, get all the answers you need to get your job done.
The cost to install a whole-house generator in St Louis, MO varies based on factors like generator size, fuel type, and installation complexity. Learn the typical price range and what influences your total cost.
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