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Generator Subpanel Installation
Backup power is bought for one week a year and judged on that week. Surge protection is the cheapest insurance in the house, and whole-home protection works differently from a power strip.
Generator Subpanel Installation in O’Fallon and across St. Charles, St. Louis, Lincoln and Warren counties.
Owner-operated: the person who answers the phone is the person who measures it.
5.0 from 94 Google reviews · BBB A+ since 2022
What this work actually involves
The transfer switch is installed so the generator can never back-feed the utility, which is the part that protects line workers.
First the reading, then the explanation, then the repair scoped to what was actually found. If that turns out smaller than the job you called about, that is what you are charged for.
Work needing a permit gets one and work needing an inspection is left ready for it. There is no handoff between whoever quotes and whoever fixes, because they are the same person.
When people call about this
- A home office that cannot go dark
- Electronics lost to a storm
- Outages more than once a year
- A well pump the house depends on
Why people choose Clint for it
The diagnosis and the repair are the same person’s work, which is why the explanation you get is first-hand rather than relayed.
Five point zero from 94 Google reviews, A+ with the BBB since December 2022, and seventeen years in the trade behind it.
Where this is done
Thirty towns across five jurisdictions, worked out of O’Fallon. The housing stock and the inspection process both change as you move across them.
See the full service area, or the rest of our backup power work.
Transfer switches and back-feeding
A transfer switch physically prevents the generator and the utility from ever being connected at once. That is not a formality: back-feeding energises the lines outside and endangers the crews restoring your street.
An interlock kit achieves the same thing more cheaply on many panels, by making it mechanically impossible to close the generator breaker and the main together.
Surge protection that actually works
Whole-home surge protection installs at the panel, where it can clamp what arrives on the service conductors. A power strip protects one device from what is already inside the house.
Both have a place. Layered protection, panel plus point-of-use for sensitive electronics, is what survives a Missouri storm season intact.
Sizing it to what you actually need running
The cost difference between keeping the essentials alive and running the whole house is large, and it is decided by a list you write: furnace blower, refrigerator, well pump, sump, a few circuits of light. Added up honestly, that list is usually smaller than people expect.
Whatever the size, the transfer has to make back-feeding physically impossible, which is a transfer switch or a listed interlock, never a cord into a dryer outlet. That is the part inspectors look at and the part that protects the utility crews working the line.
Panels: full, overloaded, or obsolete
Three different problems get called the same thing. A full panel has no space left but adequate service. An overloaded service cannot carry the house. An obsolete panel has a known defect or no available parts. Each has a different and very differently priced answer.
The load calculation and a look at the bus with the cover off decide which one you have. A sub-panel solves the first for a fraction of the third.
Permits, inspections and why they vary here
Requirements genuinely differ across this metro. O’Fallon, St. Charles, St. Peters, the St. Louis County municipalities and St. Louis City each run their own process, and what one treats as a minor repair another permits and inspects.
Work that needs a permit gets one, and work that needs an inspection is left ready for it with the panel labeled and the junctions accessible. That matters most before a closing, when an inspector’s written item becomes someone’s negotiating position.
“Infinity came out for same day service after an electric line had been cut in my yard. He was able to locate and correct it very quickly, eliminating any risk of injury or additional power outage.”
Melissa Johnson · Google review
How the visit goes
- The call
What you need to keep running and how often the power goes out where you are.
- The measurement
The loads you named, added up honestly, and the panel’s capacity to feed a transfer switch or interlock.
- The finding
A size and a configuration, with the cost difference between keeping the essentials on and running the whole house made plain.
- The work
Unit sited, circuit run, transfer switch or interlock installed so back-feeding is impossible, inspected, then a walkthrough of starting and transferring with you present.
What the job includes
- Load selection: what has to run, what can wait
- Generator or inlet sized to the chosen loads
- Transfer switch or interlock so back-feeding is impossible
- Pad or mounting, and the circuit to it
- Permit and inspection where required
- A walkthrough of starting and transferring, in person
What it does not
- Gas piping, which is the plumber’s trade
- Concrete pads beyond a prefabricated base
- Generator servicing contracts
If the fix belongs to another trade, you get the name of one rather than a price from this one. There is a gallery of finished jobs, and a form if that is easier than calling.
Related backup power work
Generator Subpanel Installation across the metro
Where the house is changes what the work involves. Clint works out of O’Fallon across five jurisdictions, and the same service means different work in each.
St. Louis City
Fishing a wall is harder here and sometimes not possible, so the honest answer about opening one comes before the work rather than during it.
Lincoln County
Distance is the design factor out here. A run to a shop or a well house is often hundreds of feet, which makes voltage drop a real calculation rather than a textbook one.
Warren County
Warren County mixes newer builds with older farm properties, and generator work comes up more often there than it does in town.
Every municipality covered is listed on the service areas page.
Questions worth asking first.
What size generator do I need?
It depends on what has to keep running. A well pump, a sump pump and a furnace need very different capacity from a whole house, and picking the loads deliberately keeps the cost sensible.
Is a transfer switch required?
Yes, for any permanent standby system. It stops the generator back-feeding the utility, which is what protects the line workers restoring your street.
Can I use a generator cord into a dryer outlet?
No. That back-feeds the utility and endangers the crews working your line. A transfer switch or a listed interlock is what makes that physically impossible.
Are you licensed and insured?
Licensed, bonded and insured, with workers compensation coverage, and accredited A+ with the BBB since 2022.
Where do you work?
Out of O’Fallon across St. Charles County, St. Louis County, St. Louis City, and Lincoln and Warren counties, roughly a fifty mile radius.
Talk to the person who will do the work.
No dispatcher, no salesman. Clint takes the call and Clint does the job. Generator Subpanel Installation in O’Fallon and across the metro.
Weekdays 8-5, Fri to 4, Sat 10-3 · or describe it in writing.