Surge protection is not strictly required for an EV charger to operate, but it is strongly worth considering, because a charger contains electronics that a voltage surge can damage, and protecting a significant, relatively expensive piece of equipment is a sensible safeguard. Whole-house surge protection at the panel is a common way to protect the charger along with the home’s other equipment. Understanding the options helps you decide how to protect your EV charger.
Here is what to know about surge protection for an EV charger.
Not strictly required, but worth considering
An EV charger does not strictly require surge protection to function; it will charge your car without it. However, surge protection is strongly worth considering, because a surge can damage the charger’s electronics, as covered in our article on whether a surge can damage an EV charger. Given that the charger is a significant investment and important for charging your vehicle, protecting it from surges is a sensible safeguard, even if not mandatory.
Why it is worth it
Surge protection for an EV charger is worth considering because:
- The charger contains electronics vulnerable to surge damage
- It is a significant, relatively expensive piece of equipment
- A surge could mean a costly repair or replacement and loss of home charging until fixed
- Surges come from lightning, the utility, and within the home, so exposure is real.
Weighing the cost of protection against the cost and inconvenience of a damaged charger, protection often makes sense, especially where surges are more likely.
Whole-house surge protection
A common and effective way to protect an EV charger is whole-house surge protection installed at the electrical panel. This protects not only the EV charger but also the home’s other electronics and appliances from surges entering through the electrical system. Because it covers the whole home, whole-house surge protection is often the sensible choice, protecting the charger as part of broader protection. It relies on a properly grounded electrical system to work effectively.
Layered and built-in protection
Protection can be layered, and some chargers have built-in protection:
- Whole-house protection at the panel for surges entering the home
- Additional protection closer to the charger in some cases
- Built-in protection in some chargers, though the level varies and may not replace dedicated protection
A sensible approach is whole-house protection for broad coverage, considering any built-in charger protection as a complement. A licensed electrician can recommend the right combination for your charger and home.
Recommended and installed by an electrician
Because the right surge protection depends on your charger, home, and surge exposure, a licensed electrician can recommend and install it. They can assess whether whole-house surge protection, additional protection, or reliance on built-in protection suits your situation, and install it on a properly grounded system. For a worthwhile safeguard on a significant investment, having an electrician set up appropriate protection is a sound step.
Surge protection is not strictly required for an EV charger, but it is strongly worth considering, because the charger contains electronics a surge can damage, and protecting a significant, relatively expensive piece of equipment is a sensible safeguard. Whole-house surge protection at the panel, on a properly grounded system, is a common and effective way to protect the charger along with the home’s other equipment. A licensed electrician can recommend and install the right protection.
Stella Electric installs surge protection to safeguard EV chargers and homes across the Baltimore area and throughout Maryland, with flat-rate pricing and no overtime charges. If you want to protect your charger from surges, we can help. Financing is available on qualifying projects.
