How it works
A current sensor on your main service tells the system how much power the house is using. When the house is busy — dryer, oven and air conditioning at once — the EVEMS reduces or pauses the charger. When load drops, charging resumes. Overnight, when most EV charging happens, the house is usually quiet anyway.
Is it allowed?
Yes. The electrical code recognizes EV energy management as a way to add charging without increasing the service size, as long as the system is listed and installed correctly.
When it makes sense
- You have a 100 A or 125 A service
- You drive a typical daily distance
- You're not also adding a heat pump with electric backup soon
Costs
Adding an EVEMS to an EV charger install typically adds $600 – $1,200 in the GTA. Some chargers have load management built in and only need a sensor.
More: EV charger installation · EV charger costs.
Quick questions
Will my car charge slower with an EVEMS?
Only when the house is busy. Overnight, most EVs still fully recharge.
Does it work with any charger?
Some chargers have it built in; others work with a separate listed EVEMS device. We match the setup to your charger.
Can it handle two EVs?
Yes — load-sharing setups split one circuit's capacity between two chargers.
