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When an EV charger needs a panel upgrade

An EV charger needs a panel upgrade only when your home's electrical service runs short on capacity. Here is how to tell.

A Level 2 home charger typically runs on a dedicated 240-volt circuit, often 40 or 50 amps depending on the charger and vehicle. That is a large, steady load, and your panel has to have room for it.

How we check

We start with a load calculation. It adds up the demand from your existing equipment (range, dryer, air conditioning, water heater and more) and checks whether the new circuit fits within the capacity of your service. A photo of your panel label and the breaker layout helps us give you an early read.

When you may not need an upgrade

Many homes have enough capacity as is. Some chargers can also be set to a lower amperage, and load management devices can share capacity with large appliances. The right option depends on your calculation.

Signs an upgrade may be needed

No open breaker spaces, an older or undersized panel, frequent breaker trips, a fuse box, or other planned additions such as central air or a heat pump. In those cases, upgrading the panel often makes sense for more than the charger.

Permit and inspection requirements vary by municipality. We confirm what your local building department requires before work begins.