What Is a Power Surge? A Plain-English Guide
Last verified: September 2026
A power surge is a quick spike of electricity that can ruin your electronics in an instant — or wear them down a little at a time. Here's what causes them and how to protect your home. Rather have a hand? My number is (330) 200-8042.
Power Surges, at a Glance
A power surge is a sudden spike of electricity — more than your wiring and gadgets expect — and it can either destroy a device on the spot or quietly shorten its life over years. The surprise for most folks is that most surges start inside your own home, from big appliances cycling on and off, not from lightning. This guide explains what surges are and where they come from, in plain English. There's a printable 29-page version up top.
Common Questions
1 What exactly is a power surge?
It's a brief spike of voltage — more electrical 'pressure' than your wiring and devices are built for — often lasting just a tiny fraction of a second. That instant of extra push is what stresses or damages sensitive electronics.
2 What causes power surges?
Three main sources: lightning (usually a nearby strike jumping onto the lines, not a direct hit); the power grid (switching, repairs, and the jolt when power returns after an outage); and, most often of all, the big appliances inside your own home — the furnace, AC, refrigerator, and pumps — cycling on and off.
3 Aren't surges just a lightning problem?
No — that's the biggest myth. A nearby lightning strike can certainly cause one, but many experts say the majority of surges start inside your home from everyday appliances. Those small, frequent spikes wear electronics down over time.
4 What do surges actually damage?
Anything with a delicate circuit board: TVs, computers, modems and routers, game consoles, and increasingly ordinary appliances like furnaces, washers, and even LED light fixtures. Plain items like lamps and basic heaters shrug off small surges more easily.
5 How do I protect my home?
With two layers. A whole-home protector at your electrical panel (a licensed electrician's job, with a permit) stops big surges before they spread, and plug-in protectors at the wall (which you can set up yourself) guard sensitive electronics. Best of all is having both.
6 Is a surge protector the same as a battery backup?
No. A surge protector stops spikes but won't keep anything running during an outage. A UPS (battery backup) bridges outages and smooths dips — and most UPS units include surge protection too. They're covered in their own guide in this set.
Would You Rather I Just Help?
Understanding surges is the easy part — and acting on it is easier than most folks expect. I'll walk your home with you, set up the right plug-in protectors, and line you up with a trusted electrician for a whole-home unit if you want one. Nothing to sell you, ever. $99 flat for a visit, 30-day come-back-free.
Would you rather I just do this for you?
No shame in it — plenty of folks would rather hand it off, and that's what I'm here for. I'll come to your home, set it up right, and make sure it's working before I leave. Flat $99 per visit — no jargon, no upsell, and every visit is 30-day come-back-free.
Not a hardware job? I can often fix it remotely for $49 — a secure screen-share, up to 2 hours, that you watch the whole time and can end whenever (included free for $39/mo Support Plan members, and it counts toward the $99 if it turns out I need to come out).