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Tesla Charger Installation
Utility rebates and inspection requirements vary by municipality here. An EV charger is a continuous load, which means it is sized differently from an outlet you plug a tool into.
Tesla Charger Installation in O’Fallon and across St. Charles, St. Louis, Lincoln and Warren counties.
Clint Ehman, seventeen years in the trade, running Infinity Electric out of O’Fallon since 2022.
5.0 from 94 Google reviews · BBB A+ since 2022
What this work actually involves
The charger is mounted where the cable actually reaches the car, which sounds obvious and is the most common complaint about other people’s work.
The order is always the same: reproduce it, measure it, say what the number means, fix the thing the number points at. Nothing gets bundled on the way past.
Permits and inspections happen where the municipality requires them, and the panel is left labeled. One person does all of it.
When people call about this
- A garage with no dedicated circuit
- Wanting a second charger
- A charger moved from an old house
- A new EV on order
Why people choose Clint for it
There is no dispatcher taking a description for someone else to act on, and no commission riding on what the visit totals. The person who measures it is the person who fixes it.
Seventeen years in the trade and four running Infinity Electric out of O’Fallon, with 5.0 from 94 Google reviews and BBB accreditation since 2022.
Where this is done
O’Fallon first, then the rest of St. Charles County, St. Louis County and the City, and out to Lincoln and Warren. If you are just past that, the call is still worth making.
See the full service area, or the rest of our ev charging work.
Load management instead of a service upgrade
Many houses have enough service for a car and not enough on paper. Load management solves that: the charger watches total demand and backs off when the dryer and the air conditioning are both running.
That costs a fraction of a service upgrade and charges a car perfectly well overnight. It is worth asking about before anyone quotes you a new panel.
Where the charger goes and why it costs what it does
The run from the panel to the parking spot is usually the larger part of the install. A charger on the far side of a finished garage is a different job from one on the panel wall, and an attached garage is a different job from a detached one.
So the route gets walked before anything is priced: what it passes through, whether existing cavities can carry it, and whether the cable will reach the car’s port with slack on the side it actually parks.
What the Wall Connector asks for
The Wall Connector is adjustable, so the circuit is designed around the amperage you set rather than its maximum. At 48 amps it wants a 60 amp continuous-duty circuit; dialed back it fits inside far smaller services and still fills the car overnight.
That adjustability is the reason many houses do not need a service upgrade. The load calculation sets the setting, and the charger is commissioned and test-charged before it is left.
What makes this harder in older housing stock
Across this metro the recurring complications are predictable: no equipment ground, aluminum branch wiring from the mid-seventies, knob-and-tube buried in blown-in insulation, panels that have been added to several times, and splices in places the code has not allowed for decades.
Those turn a simple job into a decision about scope. The decision gets put to you with the reading behind it rather than made quietly and billed.
What the price actually depends on
Three things move the number on almost every job: how far the run has to travel and what it passes through, whether the existing panel has space and the service has capacity, and whether the municipality wants a permit and an inspection. None of those is visible from the phone call, which is why the measurement comes before the quote.
What does not move it is urgency theatre. There is no inflated figure waiting to be discounted, and no bundle built so the thing you called about cannot be bought on its own.
“Clint came out installed me a large 200 amp panel put some new dedicated lines in my basement and garage he did great clean work all inspections passed he was thorough and knowledgeable. I will have him back out again.”
Jason Holtzman · Google review
How the visit goes
- The call
Which car, which charger, and where it parks. Those three answers decide most of the install before anyone visits.
- The measurement
A load calculation against the existing service, plus the run from the panel to the parking spot and what it passes through.
- The finding
Either the service carries it, or load management lets it share, or a service upgrade is genuinely needed. You hear which, with the number behind it.
- The work
Dedicated circuit sized for continuous duty, disconnect where the code and the inspector expect it, charger mounted so the cable reaches with slack, and a test charge before anyone leaves.
What the job includes
- Load calculation to confirm the service can carry the charger
- A dedicated circuit sized for continuous duty, on its own breaker
- Charger mounted where the cable reaches the car with slack to spare
- Disconnect where code and the inspector expect it
- Permit and inspection where required
- Conduit for a second charger while the wall is open, if you want it
What it does not
- Supplying the charger itself, unless you ask
- Utility rebate paperwork, though we will tell you what exists
- Charging network accounts and apps
If the fix belongs to another trade, you get the name of one rather than a price from this one. See finished work, or say what the house is doing.
Related ev charging work
Tesla Charger Installation across the metro
Housing stock varies sharply across the counties here, and so does the work. Same trade across five jurisdictions out of O’Fallon, with a different inspection process in each.
St. Charles County
St. Charles County is mostly 1990s and 2000s subdivisions. The wiring is modern and the services were sized before anyone owned an electric car or finished a basement, so capacity is the usual constraint rather than condition.
St. Louis County
Older stock that has been worked on repeatedly, so a panel here has often been added to three or four times by different hands.
St. Louis City
The City is an independent city, not part of the County, and it runs its own permits and inspections. Assuming county process here is a common and expensive mistake.
See which towns fall inside the radius on the service areas page.
Questions worth asking first.
Can two cars share one circuit?
With load-managed chargers, yes, and for most two-car households overnight charging still finishes both. It is considerably cheaper than new service.
Can my panel handle a charger?
Often yes. The load calculation checks what the house already runs against the service rating. Where it is tight, load management lets the charger share capacity instead of forcing an upgrade.
Level 1 or Level 2?
Level 1 plugs into a standard outlet and adds a few miles an hour, which suits short commutes. Level 2 needs its own circuit and fills a car overnight. The honest answer depends on your daily miles.
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.
Do you pull permits?
Where the municipality requires one, yes, and the work is left ready for inspection with the panel labeled and junctions accessible. Requirements genuinely differ across this metro, which is why it is established per address rather than assumed.
Talk to the person who will do the work.
No dispatcher, no salesman. Clint takes the call and Clint does the job. Tesla Charger Installation in O’Fallon and across the metro.
Hours are Mon-Thu 8-5, Fri 8-4, Sat 10-3 · or type it out.