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Wallbox EV Charger Installation
Utility rebates and inspection requirements vary by municipality here. Most EV installs come down to one number: what the panel has left after everything else the house already runs.
Wallbox EV 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.
A number follows a measurement here, never a guess. You get told what the reading was and what it means before any work is agreed, including on the days when the answer is one loose connection.
Permitted and inspected where the address requires it, labeled at the panel, and done by the person who diagnosed it rather than handed down a chain.
When people call about this
- A panel with no spare double-pole space
- A garage with no dedicated circuit
- Wanting a second charger
- A charger moved from an old house
Why people choose Clint for it
Nobody here earns more by finding more. That is the structural reason the small answer gets given when the small answer is true.
Seventeen years in the trade, Infinity Electric founded in June 2022, 5.0 from 94 Google reviews, BBB accredited A+.
Where this is done
O’Fallon and the surrounding St. Charles County suburbs, out through St. Louis County and St. Louis City, and into Lincoln and Warren counties. Roughly a fifty mile radius.
See the full service area, or the rest of our ev charging work.
Why charging is treated as a continuous load
The code treats anything drawing for three hours or more as continuous, and sizes its circuit at 125 percent of the draw. A car charges for hours, so a 48 amp charger needs a 60 amp circuit. That multiplier is why charging eats service capacity faster than its nameplate suggests.
It also explains why dialing a charger back is so effective. Dropping from 48 to 32 amps takes the circuit from 60 to 40, which frequently fits inside an existing service, and still fills most cars overnight.
Charging at home versus charging out
Public charging costs several times what home charging does, and the gap is the whole financial argument for an install. A household driving typical mileage recovers the cost of a Level 2 install faster than most people expect.
That calculation depends on your actual mileage rather than the car’s range, which is why the first question is how far you drive on a normal day.
What the car actually needs from the house
A Level 2 charger is a continuous load, which means the circuit is sized at 125 percent of the charger’s draw rather than to its nameplate. A 48 amp charger therefore wants a 60 amp circuit, and that is the number that has to fit inside what the service already carries.
Where it does not fit, there are usually two honest answers before a service upgrade: a smaller charger that still fills the car overnight, or load management that lets the charger share capacity with the range or the dryer. Both are cheaper than new service and both are code-compliant. You get the load calculation either way.
Who actually does the work
Clint Ehman does the diagnosis and the repair himself. There is no salesman writing a scope for a technician to execute, and nobody paid on what the visit totals.
Seventeen years in the trade, four of them running his own shop out of O’Fallon, licensed, bonded and insured with workers compensation coverage, 5.0 from 94 Google reviews, and A+ BBB accreditation held since 2022.
What gets left behind when the work is done
A labeled panel, accessible junctions, the old parts if you want to see them, and a straight account of anything found along the way that was not part of the call.
Where something else was found, you get told what it is and whether it needs doing now, later or not at all. That third answer is a real answer and it gets used.
“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
Anything outside electrical, you will be told who to call rather than sold it. Recent jobs are worth a look before you call.
Related ev charging work
Wallbox EV Charger Installation across the metro
The same job is not the same job in every part of this metro. Same trade across five jurisdictions out of O’Fallon, with a different inspection process in each.
St. Louis County
The obsolete panel brands concentrate in this county, because they were installed through exactly the decades this housing was built and upgraded.
St. Louis City
St. Louis City is century brick with shared walls and basement panels that have been added to five times. Code corrections and occupancy inspections are the common call.
Lincoln County
Lincoln County is rural service: longer drops, well pumps and septic loads that city panels never carry, and outages that make backup power a practical purchase rather than a luxury.
The whole working radius is mapped on the service areas page.
Questions worth asking first.
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.
Do I need a 60 amp circuit for a 48 amp charger?
Yes. Charging is a continuous load, so the circuit is sized at 125 percent of the charger’s draw. That is also why dialing the charger back is often what keeps a house off a service upgrade.
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.
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.
Ask what it actually reads.
You get the figure and what it means, before any work is agreed. Wallbox EV Charger Installation in O’Fallon and across the metro.
Weekdays 8-5, Fri to 4, Sat 10-3 · or describe it in writing.