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EV Charger Installation
Charging at home is a nightly habit, so the install has to be boring and reliable. An EV charger is a continuous load, which means it is sized differently from an outlet you plug a tool into.
EV Charger Installation in O’Fallon and across St. Charles, St. Louis, Lincoln and Warren counties.
One electrician, start to finish. Seventeen years in the trade and four running his own shop out of O’Fallon.
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 charger moved from an old house
- A new EV on order
- A charger that trips mid-session
- A panel with no spare double-pole space
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.
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.
Continuous load, and why it changes the maths
Code treats EV charging as a continuous load, which means the circuit is sized at 125 percent of the charger’s rating. A 40 amp charger wants a 50 amp circuit. That single rule explains most of the difference between an EV install and an ordinary outlet.
It also explains why a charger that worked at an old house trips at a new one. The charger did not change; the circuit behind it did.
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.
What an inspector looks for on a charger
Circuit sizing for continuous duty, the disconnect where the code requires it, correct conductor type for the route, and the unit mounted and supported per its own listing. That is most of the inspection.
Getting those right the first time matters because a charger install is permitted work in every municipality in this footprint.
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 did an excellent job installing two bathroom exhaust fans. He installed high-quality fans that were far superior to the ones I had purchased from a big box store. I highly recommend his services.”
David Hinners · 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
Related ev charging work
EV Charger Installation across the metro
Housing stock varies sharply across the counties here, and so does the work. Five jurisdictions, five different sets of conditions, all worked out of O’Fallon.
St. Charles County
The subdivisions here were wired correctly for what houses drew at the time. A charger, a heat pump and a finished lower level later, the arithmetic no longer works out.
St. Louis County
This is where the genuinely old wiring lives: cloth insulation, no equipment ground, fuse panels and the mid-seventies aluminum. Each has an accepted remedy rather than requiring a whole-house rewire.
St. Louis City
Century housing, its own permitting authority, and occupancy inspections that decide a lot of the calls.
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.
Who actually shows up?
Clint Ehman. Infinity Electric is owner-operated, so the person who answers the phone is the person who measures your panel and pulls the permit. There is no dispatcher and no commissioned salesman.
Are you licensed and insured?
Licensed, bonded and insured, with workers compensation coverage, and accredited A+ with the BBB since 2022.
Tell him what the house is doing.
You will get a reading and a straight answer about what it means, including the answer where the fix is small. EV Charger Installation in O’Fallon and across the metro.
Mon-Thu 8-5 · Fri 8-4 · Sat 10-3 · or ask online