You can often install an EV charger on a 60-amp subpanel, but only if the subpanel and the feeder supplying it have enough spare capacity for the charger’s circuit after the subpanel’s existing loads, which a load calculation determines. A 60-amp subpanel has limited total capacity, so whether a charger fits depends on what else the subpanel serves and the charger’s size. Understanding this helps you know whether your subpanel can host a charger or whether changes are needed.

Here is what to know about installing an EV charger on a 60-amp subpanel.

The subpanel’s capacity is the key

A 60-amp subpanel is fed by a 60-amp feeder, giving it 60 amps of total capacity to share among everything it serves. Whether you can add an EV charger depends on how much of that 60 amps is already used by the subpanel’s existing loads, and how much the charger needs. If there is enough spare capacity within the 60 amps for the charger’s circuit, it can work; if the subpanel is already heavily loaded, there may not be room. So the subpanel’s spare capacity is the deciding factor.

The charger’s size matters

How much capacity the charger needs depends on its size, and the continuous-load rule applies:

• A lower-power Level 2 charger needs less of the subpanel’s 60 amps
• A higher-power charger needs more and may not fit a 60-amp subpanel alongside other loads
• Because EV charging is continuous, the circuit is sized at 125 percent of the charger’s load, so a charger’s circuit uses more of the capacity than its raw amperage.

A smaller Level 2 charger is more likely to fit a 60-amp subpanel’s spare capacity than a high-power one, which may require the full subpanel capacity or more.

It depends on the subpanel’s existing loads

The other half of the equation is what the subpanel already serves. If the subpanel feeds only a few modest loads, it may have plenty of its 60 amps spare for a charger. If it already feeds significant loads, the remaining capacity may be too small for a charger. A load calculation for the subpanel determines how much of its 60 amps is used and how much is available, which is essential before adding a charger to it.

Options if the subpanel is too small

If a 60-amp subpanel does not have enough spare capacity for the charger, options include:

• A smaller charger sized to fit the available capacity
• Load management, to add the charger within the subpanel’s capacity by managing loads
• A feeder upgrade, to supply the subpanel with more capacity (covered in our article on feeder upgrades)
• A different circuit source, such as the main panel if it has capacity.

A licensed electrician determines the best approach based on the subpanel, its feeder, and your charger.

Confirmed by a load calculation

Because the answer depends on the subpanel’s capacity, its existing loads, the feeder, and the charger, whether you can install an EV charger on a 60-amp subpanel is confirmed by a load calculation from a licensed electrician. They assess the subpanel and feeder, determine the spare capacity, and advise whether the charger fits, needs to be smaller, needs load management, or needs a feeder upgrade. This ensures the installation is safe and within the subpanel’s limits.

You can often install an EV charger on a 60-amp subpanel if the subpanel and its feeder have enough spare capacity for the charger’s circuit after the subpanel’s existing loads, with a smaller charger more likely to fit than a high-power one. Because EV charging is continuous, the circuit is sized at 125 percent of the charger’s load. A load calculation by a licensed electrician determines whether it fits, and options like a smaller charger, load management, or a feeder upgrade help if it does not.

Stella Electric assesses subpanels and installs EV charging for homeowners across the Baltimore area and throughout Maryland, with flat-rate pricing and no overtime charges. If you want a charger on your subpanel, we can determine what works. Financing is available on qualifying projects.