Most homeowners have a power strip with a built-in surge protector on their TV or computer. What most don't realize is that those strips only protect the devices plugged directly into them — and they do nothing for your refrigerator, HVAC system, washer, dryer, or any of the other high-value appliances throughout your home.
What Causes Power Surges?
The most dramatic surges come from lightning strikes near your home or on the utility line. But the majority of damaging surges are internal — caused by large appliances cycling on and off. Every time your air conditioner compressor starts, it creates a small voltage spike that travels through your home's wiring. Over time, these repeated micro-surges degrade the sensitive electronics inside your appliances, smart home devices, and HVAC controls.
How Whole-Home Protection Works
A whole-home surge protector installs directly at your electrical panel and intercepts surges before they reach any circuit in your home. It works alongside your existing point-of-use strips (which handle any residual surges that get through) to create a layered defense.
The device itself is compact — about the size of a thick paperback book — and installs in under an hour. Quality units from manufacturers like Siemens, Leviton, and Square D carry clamping voltages of 400V or lower and include connected equipment warranties of $25,000–$75,000.
The Cost vs. the Risk
A professionally installed whole-home surge protector typically costs $300–$500 in the Twin Cities area. Compare that to replacing a smart HVAC thermostat ($200–$500), a refrigerator with a digital control board ($800–$2,000), or a washer/dryer pair ($1,200–$2,500) — and the math is straightforward.
We install whole-home surge protection on most of our panel upgrade jobs as a standard add-on. If you'd like it added to your existing panel, it's a quick standalone service call.