Do I Need a Panel Upgrade for an EV Charger?

If you've just bought an electric vehicle — or you're about to — one of the first questions you'll face is whether your home's electrical panel can handle a Level 2 EV charger. For thousands of Toronto and GTA homeowners, the answer isn't straightforward. Here's everything you need to know.

What Does a Level 2 EV Charger Actually Draw?

A standard Level 2 home EV charger draws between 32 and 48 amps continuously. Under Ontario's Electrical Code, a continuous load requires a breaker sized at 125% of the draw — meaning a 48-amp charger needs a 60-amp dedicated breaker.

When you add that to everything else running in your home — electric stove, air conditioner, dryer, heat pump — the math gets tight fast.

The 100-Amp Panel Problem in Toronto

Here's the issue most Toronto homeowners run into: if your home was built before the 1980s (and many in East York, North York, Scarborough, and Etobicoke were), there's a very good chance you're still running on a 100-amp electrical service.

The rule of thumb is that your total continuous load should never exceed 80% of your main breaker — that's 80 amps on a 100-amp panel. Once you account for your existing appliances, there's often no room left for a 32–48 amp EV charger.

Adding one anyway risks tripping your main breaker repeatedly — or worse, creating a fire hazard.

So Do You Need a Panel Upgrade?

Maybe not. This is where a lot of contractors (and a lot of online guides) miss something important.

Thanks to Electric Vehicle Energy Management Systems (EVEMS) — specifically devices like the DCC-12 — it's now possible to install a Level 2 charger on a fully loaded 100-amp panel without upgrading your service.

Here's how it works: the EVEMS monitors your home's real-time electrical load. If your total draw approaches your panel's limit (say, your AC and oven both cycle on), the system temporarily reduces power to the EV charger. The moment demand drops, it restores full charging speed. Your car still gets a full charge overnight — you just won't notice the brief interruptions at 2am.

EVEMS vs Panel Upgrade: Which Is Right for You?

Scenario	Best Solution	Estimated Cost
200-amp panel with spare capacity	Standard EV charger install	$800 – $1,500
100-amp panel, no other major upgrades planned	EVEMS (DCC-12) + EV charger	$1,200 – $1,800
100-amp panel + adding heat pump / hot tub	Full 200-amp panel upgrade	$3,000 – $5,000+
Knob-and-tube wiring present	Rewire + panel upgrade + EV charger	$5,000 – $10,000+

What About Knob-and-Tube Wiring?

If your Toronto home still has active knob-and-tube wiring, a panel upgrade alone won't be enough. This legacy wiring lacks a ground wire, which means a fault can cause a shock or electrical fire. Most Ontario insurance companies will not insure homes with active knob-and-tube wiring, and the ESA will not issue a Certificate of Acceptance for an EV charger installation in a home with this wiring.

The solution is a full rewire and panel upgrade — a larger job, but one that also permanently resolves your insurance risk and dramatically increases your home's resale value.

The ESA Permit Requirement

Regardless of which route you take, all Level 2 EV charger installations in Ontario must be performed by an ESA-licensed electrical contractor (ECRA/ESA licence), with a Notification of Work filed before the job starts. After completion, the ESA issues a Certificate of Acceptance — a document your insurance company may require, and which you'll need at resale.

DIY installation of a hardwired Level 2 charger is illegal in Ontario. Don't risk voiding your home insurance or failing a home inspection.

How to Find Out What Panel You Have

Not sure what service you're running? Here's how to check:

1. Find your electrical panel (usually in the basement or utility room)
2. Look for a label on the inside of the panel door — it will show the amperage rating
3. Common ratings: 60A (very old), 100A (common in pre-1980 Toronto homes), 200A (modern standard)

If you see "60A" or "100A" — or if you have no idea and your house was built before 1985 — book a free assessment. We'll tell you exactly what you need before you spend a dollar.

Get a Free Assessment

Our ESA-licensed electricians serve the entire Greater Toronto Area and will assess your panel at no charge. We'll give you a straight answer: EVEMS, panel upgrade, or straight install — and a fixed quote on the spot.