When people ask about EV charger installation in Baton Rouge, the real question is rarely about the car. It is about the panel. In a lot of older Baton Rouge area houses, especially ones still on 100 amp service, there is less room in that panel than the owner expects.
Here is the arithmetic. It is worth doing before you buy anything.
What a charger actually pulls
The electrical code treats EV charging as a continuous load, and the breaker feeding it has to be rated at no less than 125 percent of what the charger draws. Put the other way, the charger can only use 80 percent of its breaker. That one rule sets the whole table:
- A 32 amp charger needs a 40 amp circuit.
- A 40 amp charger needs a 50 amp circuit.
- A 48 amp charger needs a 60 amp circuit.
Now set that next to what a 100 amp service already carries. A house with central air, an electric range, an electric water heater and an electric dryer can already be using most of it before the car shows up. A 48 amp charger counts as 60 amps in the load calculation, which surprises people when the box on the wall says 48.
That is why the honest answer to "can I just plug it in" is sometimes no.
Three ways out, simplest first
Turn the charger down. Many 48 amp chargers can be set to a lower current during setup. The code lets the circuit be sized to that lower setting when the adjustment is locked behind a tool, a locked door or password-protected software, and the new rating goes on the label. A charger set to 32 amps on a 40 amp circuit is a normal install. It charges slower, and if the car sits in the driveway all night anyway, that often does not matter. It is the option people hear about least.
Load management. Louisiana currently enforces the 2020 National Electrical Code, and section 625.42 already says that when an automatic load management system is used, the charger load on the service is whatever that system allows. In plain terms, the charger backs off when the dryer and the oven are running and picks back up when they stop. The 2023 code, which takes effect in Louisiana on January 1, 2027, keeps that and adds broader energy management rules. On a house where the service is sound but tight, this lets you keep the panel you have.
A service upgrade. When the panel has no room left, or the service is 100 amps and everything in the house is electric, the right call is usually 200 amps. If the panel is already old or on its way out, the upgrade solves two problems at once.
There is also a more precise way to answer the question. Section 220.87 of the code lets an electrician size against the house's actual peak demand from a full year of utility data (or 30 days of recorded readings), instead of the standard estimate based on square footage and appliances. That is how a house that looks full on paper sometimes turns out to have room.
A rebate worth asking about
"Look, I'm not a spokesman for Entergy or DEMCO. At one point there was a rebate being thrown around, but I don't know that to be the case now. Last I read, there are incentives, but how far they go, you have to ask those companies yourself before you put those numbers in your math."
Check with Entergy's eTech program or, if you're in parts of Prairieville and Ascension Parish, DEMCO. Your bill tells you which one serves you.
What the job actually involves
The job is a dedicated circuit from your panel to where the car parks. It is permitted work, and it gets inspected like any other circuit. Ascension Parish runs its own residential electrical permits. A few things change the job more than distance does:
- Where the panel sits relative to the garage. A run down the outside wall is not the same job as a run through a finished ceiling.
- Hardwired or plug-in — that is a conversation, not a menu. A hardwired charger can run at the full 48 amps; a plug-in on a NEMA 14-50 receptacle is capped at 40 amps, and the code requires GFCI protection on any receptacle installed for EV charging. Which one fits your house depends on your panel and where the car parks — call (225) 472-1165 and talk it through before you buy a charger.
- Whether the panel has two open spaces. If it does not, something has to move, and a panel with no spaces left is already telling you something.
Common questions
Will a 48 amp charger work on a 100 amp service?
Sometimes. It depends on what else is on the service. This is a calculation, not a guess. An electrician who answers over the phone without seeing your panel is guessing. We will do the arithmetic.
Does the charger have to be on its own circuit?
Yes. It is a continuous load that runs for hours, and sharing a circuit with anything else is how you end up with a warm breaker at two in the morning.
Can I install it myself in Louisiana?
Louisiana lets homeowners do electrical work on their own home without a contractor license, but the work still needs a permit and an inspection. In Baton Rouge that means signing a homeowner affidavit. Other parishes have their own rules, so check with your permit office first. The mistake we see most is not the wiring. It is the load calculation, and the inspection is usually where that shows up.
If you are in Prairieville and trying to work out whether your panel can take a charger, call us and we will come look at the panel and do the load calculation on site. A photo of the panel label helps us show up prepared, but the answer takes someone standing in front of the panel with a meter.