Guide · Wilmington and Cape Fear

Whole-home surge protection, explained

Lightning, storms and power coming back after an outage all send surges through your wiring. A surge protector at the panel guards everything in the house, not just what's plugged into a power strip.

By PJ Hofer, licensed electrician (NC U.35874) · October 23, 2026

A power surge is a short spike in voltage. It can come from lightning, from the utility switching equipment, or from the power coming back on after an outage. Big ones can destroy equipment in an instant. Small ones wear down electronics over time.

Homes along the North Carolina coast see a lot of thunderstorms and a lot of outages. That makes surge protection worth a look.

What a whole-home surge protector is

It's a device installed at your electrical panel. When a surge comes in on the power lines, it diverts the excess to ground before it spreads through your home's wiring.

That protects things you can't plug into a power strip:

• your HVAC system and heat pump
• your water heater, range and refrigerator
• your garage door opener, well pump and pool equipment
• smart thermostats, lighting and everything hardwired

Power strips still have a job

A whole-home protector handles the big surges coming in from outside. Surge strips at the outlet add a second layer for sensitive electronics: computers, TVs, game consoles and your internet equipment. The two work together.

What the code says

The 2020 National Electrical Code added a requirement for surge protection when a home's electrical service is installed or replaced. If you're upgrading your panel or service, ask your electrician how it applies to your project.

When it's worth adding

• You're upgrading your panel or service. It's the easiest time to add one.
• You've lost equipment to a storm before.
• You have expensive HVAC, a generator, solar or EV charging, all of which have electronics worth protecting.
• You live where outages are common, since surges often hit when power is restored.

After a big strike

Many surge protectors have an indicator light that shows whether they're still protecting. After a nearby lightning strike, check it. If the light is out, have it replaced.