Modern homes run on more electronics than ever: TVs, computers, smart thermostats, Wi-Fi gear, refrigerators with control boards, and HVAC systems that don't like sudden voltage spikes. A surge lasting a fraction of a second can shorten the life of that equipment—or take it out altogether.
Whole-home surge protection is one of the simplest upgrades many Indianapolis-area homeowners add at the electrical panel. It is not the same as a power strip under the desk, and it is not a promise that lightning can never hurt your house. This guide explains what a whole-home surge protective device (SPD) does, how it differs from plug-in strips, where surges come from, and when to call a licensed electrician.
Safety first: Installing a whole-home surge protector means working at or next to the main service panel. Don't remove the panel cover, don't touch bus bars or lugs, and don't try to wire an SPD yourself. That work belongs to a licensed electrician. Our post on the dangers of DIY electrical repairs covers why panel work is easy to get wrong.
What Whole-Home Surge Protection Actually Does
A whole-home surge protective device is typically installed at or next to your main electrical panel. When a short, sharp overvoltage arrives on the service conductors, the SPD is designed to divert or clamp that excess energy so less of it reaches the branch circuits feeding your lights, outlets, and hardwired appliances.
Think of it as a first line of defense for the whole house—not a guarantee against every possible event. A nearby lightning strike that hits a tree or the utility lines can still create a huge surge. Direct strikes and extreme events can overwhelm any SPD. The realistic goal is reducing day-to-day and storm-related surge stress on the equipment you rely on.
Central Electric offers whole-home surge protection as a residential service: a surge protector installed at your panel to help protect more than whatever is plugged into a strip.
Power Strips vs. Whole-Home Protection
Many people assume a few "surge protector" power strips cover the house. They don't.
Plug-in surge strips (point-of-use)
Protect only the devices plugged into that strip
Useful for TVs, computers, gaming consoles, and other sensitive electronics
Wear out over time after absorbing surges; cheap strips may offer little real protection
Do nothing for hardwired equipment like your furnace, AC, dishwasher, or built-in oven
Whole-home SPD (panel-mounted)
Protects at the service entrance / main panel level
Helps cover branch circuits and hardwired appliances throughout the home
Complements—not replaces—good point-of-use strips for especially sensitive gear
The practical setup for most homes is both: a whole-home device at the panel, plus quality surge strips (or dedicated point-of-use protectors) on computers, TVs, and networking equipment.
Where Surges Come From
Surges aren't only lightning. Common sources include:
Utility switching — Equipment on the grid switching on or off can send short spikes down the line
Nearby lightning — A strike that hits power lines, a pole, or the ground nearby can travel in on the service
Large loads cycling — Motors and compressors starting and stopping (HVAC, well pumps, shop tools) can create smaller internal disturbances
Faults and events elsewhere on the grid — Problems upstream of your meter can show up as voltage spikes at your panel
Central Indiana storms make the outdoor sources easy to picture, but quieter utility and equipment events happen year-round. You may never notice a small surge until a control board fails or a TV dies without an obvious cause.
What a Whole-Home SPD Helps Protect
A panel-mounted SPD is meant to reduce surge stress on entertainment and office electronics (especially with strips), kitchen and laundry appliances with electronics, HVAC equipment, and smart-home gear on branch circuits.
It does not make your home lightning-proof, keep the lights on during an outage, fix an overloaded or damaged panel, or replace proper grounding and bonding. Those are related but separate systems.
If breakers keep tripping, the panel feels warm, or you see other warning signs, address the panel itself. Our guide to signs your electrical panel needs repair or replacement explains what those symptoms can mean. Surge protection is an add-on to a healthy service—not a cure for a failing panel.
How Installation Usually Works
On a typical whole-home surge visit, a licensed electrician will review your main panel and available breaker space, install a listed SPD at or next to the panel per the manufacturer's instructions and local requirements, confirm the device is connected correctly, and explain any status lights. They can also talk through whether point-of-use strips still make sense for sensitive electronics.
Some SPDs use a dedicated breaker; others mount differently. The right choice depends on your panel type, space, and service setup—which is why a site look matters more than a generic internet diagram.
We don't publish flat prices here. Panel type, available space, and whether other panel work is needed all change the job. A short visit is the honest way to scope it.
Older Homes, Panel Upgrades, and Surge Protection
Homes around Indianapolis, Greenwood, Plainfield, and Mooresville range from newer builds with roomy 200-amp panels to older services that are already near capacity. Adding surge protection is often straightforward when the panel is in good shape and has space.
A surge visit is also a fair time to ask whether the panel is keeping up with today's loads—EV chargers, kitchen remodels, and added circuits all raise the bar. If an upgrade is on the table, our post on what a 200-amp panel upgrade costs in Indianapolis is a useful starting point. Not every home needs a new panel just to add an SPD.
Partial outages, flickering lights, or repeated breaker trips should be diagnosed on their own. See power out in part of your house for safe homeowner checks before you call.
Frequently Asked Questions
Is a whole-home surge protector the same as a power strip?
No. A plug-in strip only protects what is plugged into it. A whole-home SPD installs at the panel and helps protect circuits and hardwired appliances throughout the house. Many homes benefit from both.
Will surge protection stop lightning damage completely?
No. It helps with surges that travel in on the electrical service, including nearby storms and utility events. A direct strike or extreme surge can still cause damage. Treat it as risk reduction, not a lightning shield.
Do I still need surge strips for my TV and computer?
Yes. Whole-home protection is the broad layer; point-of-use strips add another layer right at sensitive electronics.
Can I install a whole-home SPD myself?
No. Panel work involves live service equipment. Hire a licensed electrician. Don't remove the panel cover or try to wire an SPD yourself.
Does every home need a panel upgrade to add surge protection?
No. Many panels can accept an SPD as installed. If the panel is full, damaged, or undersized, an electrician may recommend other work first or alongside the SPD.
Protect Your Home's Electronics Across Central Indiana
If you want whole-home surge protection for an Indianapolis-area house, Central Electric can evaluate your panel and install a panel-mounted SPD the right way.
We serve homeowners in Indianapolis, Greenwood, Franklin, Plainfield, Avon, Brownsburg, Mooresville, Martinsville, Bargersville, and Whiteland. See our residential electrical services or request service online.
Call (317) 644-1322 to talk through whole-home surge protection for your home.