The idea in one paragraph
Your electrical service is sized for the worst case — everything running at once. In reality, that almost never happens. You are not charging the car while the dryer, the oven, the garage heater and the hot tub all run flat out. A load management system watches actual demand in real time and turns down or pauses the flexible loads when the house gets busy, then lets them resume. The service never gets overloaded, and you never had to buy a bigger one.
This is a recognized approach under the Canadian Electrical Code — the rules for energy management systems exist precisely so that homes can add large modern loads without every house on the block needing new service conductors.
When it's the right answer
- Adding an EV charger to a 100 amp service. The most common case by a wide margin, and the one most often quoted as "you need an upgrade first."
- Two EVs on one service. The system shares available capacity between them instead of doubling the requirement.
- Adding a hot tub, garage heater, air conditioning or a shop to a service with limited headroom.
- An income suite pushing an existing service to its limit.
- Where a service upgrade is genuinely difficult — a long or buried service run, an awkward meter location, or a condo or townhouse where the service is not yours to change.
And when it isn't. If your panel is already full, obsolete or unsafe, or your actual continuous load is high regardless of scheduling, load management is a bandage on the wrong problem. In that case we will tell you to do the service upgrade — even though it is the bigger job and we could have sold you the smaller one.
How we approach it
- Measure, don't assume. We run a proper calculated load for your house — service size, connected load, and the real profile of what you run and when.
- Compare the two paths honestly. You get the load management number and the service upgrade number side by side, with what each one gets you five years out. Sometimes the upgrade is the better long-term buy and we will say so.
- Specify the right equipment. Whole-panel monitoring, a charger with built-in load sensing, or a dedicated EVEMS controller — they suit different situations and different budgets.
- Install, permit, inspect, and prove it. We test the actual shed behaviour under load rather than trusting the datasheet, so you know it does what it claims when the house is busy.
What you'll notice day to day
Honestly? Very little. That is the point. Charging may slow briefly while the dryer and the oven are both going and then pick back up. Overnight, when almost all EV charging happens, the house is quiet and the charger runs full speed. Most people forget the system is there — until the first time they compare the bill for it against a service upgrade quote.
Frequently asked
Yes. The Canadian Electrical Code includes provisions for energy management systems specifically so that additional loads can be added to an existing service in a controlled way. It is permitted and inspected work, same as any other installation.
Only during the short windows when the rest of the house is drawing hard. Since most charging happens overnight while the house is asleep, the practical difference for the vast majority of drivers is none.
It varies with equipment and layout, but it is typically a substantial fraction of a full service upgrade — and it avoids the outage, the EPCOR coordination and the exterior work. We quote both so you can see the two numbers next to each other.
Often yes, depending on the charger. Some units have load sensing built in and just need the sensing hardware installed and configured. Others need an external controller. Tell us the make and model and we'll tell you which.