Does Your South Carolina Home Need a Panel Upgrade for an EV Charger?

One of the most common questions South Carolina homeowners have about EV charger installation is whether their electrical panel needs to be upgraded. Here's what to know.

What is an Electrical Panel?

Your electrical panel (also called a breaker box or load center) is the central hub that distributes electricity throughout your home. It has a maximum capacity measured in amps — typically 100A, 150A, or 200A for residential properties.

Why Panel Capacity Matters for EV Charging

A Level 2 EV charger typically requires a dedicated 40A to 60A circuit. If your panel is already close to its capacity with existing appliances and circuits, adding a 40A to 60A EV charger circuit may not be possible without a panel upgrade.

100A Panels and EV Charging

Many South Carolina homes built before the 1990s have 100A panels. While it is sometimes possible to add an EV charger circuit to a 100A panel, it depends on the existing load. A licensed electrician will evaluate your panel's current load and available capacity before recommending whether an upgrade is needed.

200A Panel Upgrades

Upgrading from a 100A to a 200A panel is a common project that provides ample capacity for EV charging plus future electrical needs. The upgrade involves replacing the panel, the meter base, and the service entrance conductors, and requires coordination with your utility company.

Load Management Alternatives

Some EV chargers and smart charging systems include load management features that automatically reduce charging speed when other high-draw appliances are in use, potentially allowing EV charging on a 100A panel without an upgrade.

Getting a Panel Evaluation

The only way to know whether your panel needs upgrading is to have a licensed electrician evaluate it. Submit a request and we'll help connect you with a licensed contractor in your South Carolina area.