Do I Need a Panel Upgrade for an EV Charger?
Often, no. Here is how to tell, what the cheaper options cost, and when a 200A upgrade really is the right call.
The short answer
Most houses with a 200A service can take a home charger with no changes to the panel. Many 100A houses can too, if the numbers work. A service upgrade is the last option we look at, not the first.
What decides it is two separate questions. People mix them up all the time.
Question 1: is there space?
A charger needs a two-pole breaker, which takes two free slots in your panel. Open the panel door and look. If the slots are all used, that is a space problem, and it is usually cheap to solve.
Question 2: is there capacity?
Capacity is whether your service can carry the charger on top of everything else in the house. A charger draws a lot of power for hours at a time, so the electrical code counts it at its full rating.
We check this with a load calculation: the size of the house, electric heat, the stove, dryer, air conditioning, a hot tub, and the charger itself. A 100A service running electric heat, a stove and a dryer may not take a 48A charger, even with free slots. The same house with gas heat often can.
Your options, cheapest first
| If the problem is… | Usually costs |
|---|---|
| Nothing: the panel has space and capacity | $499 for the charger |
| No free slots: rearrange or add slots | $99–$199 |
| Panel full and old: add a sub-panel | $999–$1,199 |
| Short of capacity: load management (EVEMS) | $1,399–$1,699 |
| Short of capacity: 200A service upgrade | $2,799–$3,499 |
Charger prices start with a NEMA 14-50 outlet; a hard-wired 48A Wall Connector starts at $599. The ESA permit is $199. Your exact price depends on your house.
Turn the charger down
Most chargers can be set to draw less, for example 32A instead of 48A. It charges a little slower, but for overnight charging at home most people never notice, and it can be enough to fit on a smaller service.
Use your real usage, not a guess
The standard load calculation assumes the worst case. The electrical code also allows us to use your actual measured usage: twelve months of hourly readings from your utility's smart meter, Alectra or Toronto Hydro. If your real peak use leaves enough room, the charger can go on your existing service with no upgrade. It takes a little paperwork, and we handle it.
Load management (EVEMS)
An energy management device watches the whole house. When the stove, dryer and heat are all running, it pauses the charger for a few minutes, then lets it carry on. You get full-speed charging most of the night, and your service is never overloaded.
A 200A service upgrade
Sometimes upgrading is simply the right call. We arrange the disconnect and reconnect with your utility, replace the panel and service, and the ESA inspects it. Most upgrades are done in one day.
If you need both, have them done in one visit: one permit, one inspection, one day without power, and 10% off the total.
When a 200A upgrade is the better choice
- You still have a fuse box, or a 60A or 100A service in an older house.
- Your panel is a brand that is known for problems, such as Federal Pacific Stab-Lok.
- You are planning more: a heat pump, a hot tub, a second EV, a basement suite or an addition.
- The panel is full, old, and would need a sub-panel and load management anyway.
In those cases the cheaper fixes only buy time, and you end up paying for both.
Check your own panel in two minutes
- The main breaker number: the large breaker at the top, marked 100, 125 or 200. That is your service size.
- Free slots: count the empty spaces.
- Big appliances: electric heat or baseboards, electric stove, dryer, central air, hot tub.
- A photo: take one of the open panel door and the label inside it.
Then put those answers into our instant estimate. It runs the same check we would do on the phone and shows your price in about a minute. Attach the panel photo and we can usually confirm a firm price without visiting.
Every EV charger installation in Ontario needs a licensed electrical contractor and an ESA permit. We are ECRA/ESA licensed contractor #7015891, with two years' full warranty on all our work. See also EV charger installation and panel and service upgrades.