All You need to know about energy management Systems

What Is an EVEMS and How Does It Work?

As electric vehicles (EVs) become more common across Canada, many homeowners are discovering that charging an EV at home isn’t always as simple as plugging it in. One of the biggest concerns is whether your home’s electrical service has enough capacity to safely handle the additional load.

That’s where an Electric Vehicle Energy Management System (EVEMS) comes in.

What Is an EVEMS?

An EVEMS is a smart device that monitors your home’s electrical usage in real time and automatically adjusts the amount of power sent to your EV charger.

Instead of upgrading your electrical service from 100 amps to 200 amps—which can cost thousands of dollars—an EVEMS allows you to safely install a Level 2 EV charger while staying within your home’s existing electrical capacity.

How Does an EVEMS Work?

Think of your home’s electrical service like a highway.

Your electrical panel has a maximum amount of traffic (electricity) it can safely carry. Throughout the day, appliances such as your oven, dryer, heat pump, hot tub, or air conditioner all use part of that available capacity.

An EVEMS constantly measures how much power your home is using.

• When household demand is low, the EV charger can operate at full power for the fastest possible charging.

• When demand increases, the EVEMS automatically reduces the charging rate.

• If your home reaches its maximum safe electrical capacity, the EVEMS can temporarily pause charging until more power becomes available.

This all happens automatically without any input from the homeowner.

Why Choose an EVEMS?

Avoid an Expensive Service Upgrade

A service upgrade often requires:

• A new electrical panel

• Utility coordination

• Possible meter relocation

• New service conductors

• Electrical permits and inspections

Depending on the property, these upgrades can cost several thousand dollars.

An EVEMS can often eliminate the need for this upgrade entirely.

Charge Your EV Safely

Because the system continuously monitors your home’s electrical demand, it helps prevent overloading your electrical service while ensuring your vehicle charges whenever capacity is available.

Future-Proof Your Home

As more homes add electric vehicles, heat pumps, solar systems, and battery storage, managing electrical loads becomes increasingly important.

Installing an EVEMS today helps prepare your home for tomorrow’s electrical demands.

Is an EVEMS Approved in Canada?

Yes—when installed correctly using approved equipment.

The Canadian Electrical Code allows the use of certified energy management systems that dynamically control EV charging based on available electrical capacity. This provides electricians with a safe and code-compliant method of installing EV chargers without unnecessarily increasing the size of the electrical service.

Is an EVEMS Right for You?

An EVEMS is often an excellent solution if:

• You have a 100-amp electrical service.

• You’re installing your first Level 2 EV charger.

• You want to avoid the cost of a 200-amp service upgrade.

• Your electrical panel has limited available capacity.

Every home is different, so a load calculation should always be completed before deciding on the best solution.

Let Koop Electrical Services Help

At Koop Electrical Services, we help homeowners install safe, reliable, and code-compliant EV charging solutions.

We’ll evaluate your existing electrical service, determine whether an EVEMS is the right option, and install your charger to meet all Canadian Electrical Code requirements.

If you’re thinking about installing an EV charger, contact Koop Electrical Services today. We’ll help you find the most cost-effective solution for your home while ensuring your electrical system is ready for the future.