Yes, an EV charger can be wired to a subpanel in a garage, as long as the subpanel and its feeder from the main panel have enough capacity to handle the charger's load. A garage subpanel is often a convenient source, since it is typically close to where the car parks, which can shorten the wiring run. The key is confirming the subpanel and feeder can support the added continuous load. Understanding this helps you know whether your garage subpanel can serve a charger, which an electrician confirms.
Here is what to know about wiring an EV charger to a garage subpanel.
A convenient, common option
Wiring an EV charger to a garage subpanel is a common and often convenient approach. Because a garage subpanel is usually near the parking area, feeding the charger from it can mean a shorter, simpler wiring run than going all the way back to the main panel. So if your garage has a subpanel with capacity, it can be a practical source for the charger. This makes a garage subpanel a natural option in many installations.
Confirm the subpanel has capacity
The key requirement is that the subpanel has enough capacity to handle the charger's load along with whatever else it serves. A Level 2 charger is a significant continuous load, so the subpanel must have:
- A spare breaker space for the charger's circuit
- Enough capacity to add the charger without overloading the subpanel
- Room within the subpanel's rating for the total connected load
If the subpanel is already heavily loaded, there may not be room without changes. An electrician checks the subpanel's capacity and existing loads to confirm it can take the charger.
The feeder must support it too
Just as important is the feeder, the wiring and breaker that supply the subpanel from the main panel. The feeder must be able to carry the subpanel's existing loads plus the new charger. If the feeder is undersized for the added load, it, not just the subpanel, becomes the limiting factor. For example, our article on adding an EV charger to a 60-amp subpanel covers how the subpanel's feeder size limits what can be added. An electrician verifies the feeder can support the charger, not only the subpanel.
When the subpanel needs an upgrade
If the subpanel or its feeder cannot support the charger, options include upgrading the feeder, upgrading the subpanel, using load management to balance the charger with other loads, or feeding the charger from the main panel instead. Which is best depends on your setup. An electrician assesses whether your garage subpanel can take the charger as-is or whether a change is needed, and recommends the right approach for a safe installation.
Confirmed by an electrician
Whether your specific garage subpanel can serve an EV charger is confirmed by a licensed electrician, who checks the subpanel's capacity and spare breaker space, verifies the feeder can carry the added load, and installs the charger's circuit correctly and to code. In many cases a garage subpanel works well and conveniently; in some, an upgrade is needed first. The electrician ensures the charger is wired safely to the subpanel.
Yes, an EV charger can be wired to a subpanel in a garage, as long as the subpanel and its feeder from the main panel have enough capacity to handle the charger's continuous load. A garage subpanel is often convenient, being close to where the car parks. The key is confirming both the subpanel and the feeder can support the charger, which a licensed electrician verifies before installing the circuit to code.
Stella Electric installs EV chargers from garage subpanels and main panels for homeowners across the Baltimore area and throughout Maryland, with flat-rate pricing and no overtime charges. If you have a garage subpanel, we can confirm it and install your charger. Financing is available on qualifying projects.
