Does your panel need upgrading for an EV charger?

The short answer

Probably not, if your home was built after about 2000. Probably yes, if it is on 100A service with electric heat. But the honest answer is that nobody can tell you from the outside — it depends on a load calculation.

What a load calculation actually does

It adds up the demand your home is designed to carry: heating and cooling, water heater, range, dryer, general lighting and receptacles — then checks whether adding a 48A continuous load leaves you inside the service rating. The panel label is a starting point, not the answer.

A 200A panel already running a heat pump, electric range, electric water heater and dryer may genuinely have no room. A 150A panel in a gas-heated house often has plenty.

Alternatives to a full upgrade

• Lower the charger amperage. A 32A install charges most EVs fully overnight and often fits within existing capacity.
• Load-management devices. These pause charging when the rest of the house draws heavily, letting you install on a panel that could not otherwise take it.
• Circuit sharing with an existing large appliance such as a dryer, where the layout permits.

We will tell you which of these applies before recommending an upgrade. An upgrade is four times the price of an install — it should be genuinely needed.