Quick answer
They protect different things, so the real answer is layered. A whole-home surge protective device at the panel ($500–$1,200 installed) shields everything on every circuit — including the hardwired heat pump, heat pump water heater, EV charger, and induction range that no strip can reach. Quality strips ($30–$100 each) then add a second stage at sensitive electronics. The more electrified your home, the less optional the panel-level layer becomes.
- A power strip can only defend what plugs into it — a heat pump, EV charger, or induction range is hardwired and sits entirely outside any strip's reach.
- A Type 2 SPD mounts at the panel and clamps surges before they fan out across the house, covering every circuit at once for $500–$1,200 installed.
- An electrified home concentrates the exposure: five figures of hardwired electronics-laden equipment that didn't exist in the same house a decade ago.
- PNW windstorm outages create surge risk on the way out and the way back — restoration events are a classic source of voltage spikes.
- Best practice is layers, not either/or: the SPD absorbs the big hits, quality strips catch the remainder at TVs, computers, and AV gear.
What does each option cost installed in the Seattle area?
This comparison is lopsided on price and coverage in opposite directions, which is exactly why the layered answer wins. The panel-mounted device is a modest, one-time permitted install protecting everything; strips are cheap per unit but only ever guard their own outlets — and worn-out strips guard nothing at all.
| Option | Typical installed range | What that covers |
|---|---|---|
| Whole-home SPD (Type 2, at panel) | $500–$1,200 | Quality surge protective device mounted at the main panel by a licensed electrician, sized to the service and coordinated with breaker space. |
| Quality point-of-use strips | $30–$100 each | Retail pricing for reputable strips with adequate joule ratings and status indicators — the throwaway six-outlet bar is not in this category. |
What changes the price
- Permit and code: SPD installation at the panel is licensed, permitted electrical work, and current code pushes new and upgraded services toward built-in surge protection for good reason.
- Panel condition and space: the device needs breaker positions and a sound panel to mount to — a crowded or aging panel can add scope.
- SPD ratings: surge current capacity and clamping specs vary by model; sizing to your service and equipment is part of the job, not an accessory choice.
- Replacement over time: SPDs and strips both sacrifice themselves absorbing hits — indicator lights exist so you know when a layer has quietly retired.
- What's downstream: tally the hardwired equipment (heat pump, HPWH, EV charger, range) before deciding the panel layer is optional.
Ranges are representative Seattle / Puget Sound installed prices, not a quote — your home's specifics set the real number. Eco gives you an upfront price before any work begins.
How do they work differently?
How a whole-home SPD works
Mounted beside or inside the main panel and wired to a dedicated breaker, a Type 2 SPD watches the voltage on the service. When a spike arrives — from the grid, a nearby strike, or the surge that rides in when power is restored after an outage — its internal components divert the excess energy to ground in nanoseconds, clamping the voltage that continues into your circuits. Everything downstream benefits: hardwired appliances, outlets, even the wiring itself.
How a power strip works
A surge strip uses small metal-oxide varistors to shunt excess voltage at the outlet — a last line of defense a few inches from the device it serves. Each absorbed surge consumes some of the varistors' capacity, and once spent, most strips keep passing power while providing zero protection, which is what the little indicator light is trying to tell you. A strip protects its own sockets, nothing else — and nothing hardwired can ever plug into one.
Pros and cons, honestly
Whole-home SPD
Pros
- Covers every circuit in the house, including all hardwired equipment
- The only surge defense possible for a heat pump, HPWH, EV charger, or induction range
- Clamps large external surges before they spread past the panel
- One permitted install, then years of quiet service with a visible status indicator
- Increasingly expected by code on new and upgraded services
Cons
- Costs more than a handful of strips and requires a licensed, permitted install
- Doesn't eliminate the need for point-of-use protection at sensitive electronics
- Like all surge devices, it sacrifices capacity with each major hit and eventually needs replacement
Point-of-use power strips
Pros
- Cheap and instant — protection at a specific device the same afternoon
- Adds a close-in second layer that catches what gets past the panel
- Easy to place exactly where the fragile electronics live
- No installation, permit, or electrician required
Cons
- Blind to everything hardwired — the most expensive equipment in an electrified home
- Protection silently degrades with every surge absorbed; most keep working as plain outlets afterward
- Quality varies wildly, and the cheapest bars offer little more than extra sockets
- A houseful of good strips still leaves entire circuits exposed
Which one should you choose?
Choose the whole-home SPD when
Your home contains anything hardwired you'd hate to replace — which, after a heat pump install, a heat pump water heater, or an EV charger, is five figures of inverter-driven electronics with no other line of defense. It's also the move when a panel is already being opened for other work, since adding the device then is at its cheapest. In windstorm-prone neighborhoods where outages and restorations are a winter routine, the panel layer is the difference between weathering the spike and filing claims.
Choose power strips (as the supplement) when
You're protecting plug-in electronics with sensitive internals — computers, TVs, AV receivers, network gear — where a close-in second stage catches the residual energy a panel device lets through. Strips alone are only a reasonable stopping point in a rental where panel work isn't yours to authorize, or as a stopgap before an SPD install. Buy quality: adequate joule ratings and a working protection indicator, and replace any strip that's absorbed a serious hit or predates your memory.
Also consider: backup power for the outage itself
Surge protection handles the voltage spike; it does nothing about the hours of darkness around it. If windstorm outages are the underlying worry, a standby generator or home battery addresses the outage while the SPD addresses the restoration surge — the two investments solve different halves of the same PNW storm. Our battery-vs-generator comparison maps that decision.
Ready to compare for your home?
Get honest numbers for both options side by side — an upfront range, the considerations, and the rebates you qualify for, before any work begins.
Continue exploring
- Book: Surge protection →
- Book: Surge protector installation →
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- Compare: Standard vs Battery Backup Sump Pump: Run the PNW Storm Math →
- Compare: Home Battery vs Standby Generator: The PNW Backup-Power Decision →
- Whole-house surge protection basics →
- Standby generator vs battery backup vs portable →
- All electrical comparisons →
Common questions
Why do surges happen when power comes back after an outage?
Restoration is electrically messy: reclosers cycling, transformers re-energizing, and thousands of motors across the neighborhood starting simultaneously can all push voltage transients down the line. In the Puget Sound, where winter windstorms make outage-and-restoration cycles routine, those events are a more common surge source than lightning — and they arrive precisely when every appliance is waiting to restart.
Will a whole-home SPD protect my electronics completely by itself?
It handles the heavy lifting — clamping large surges at the panel — but a small residual can still travel the branch wiring. That's why the standard recommendation is layered: the SPD as stage one, quality strips at sensitive plug-in electronics as stage two. For hardwired equipment like a heat pump or EV charger, the SPD isn't stage one; it's the only stage available.
How do I know if my old power strips still work?
Check the protection indicator light — not the power switch — and treat a dark or missing indicator as a dead layer. Varistors inside a strip are consumed by every surge they absorb, and most strips keep passing electricity after their protection is gone. Any strip that's weathered a known surge event, or that you can't date, has earned retirement.
Is a whole-home surge protector required by code in Washington?
Current electrical code requires surge protection on new and significantly upgraded dwelling services, so if you've had recent panel work, you may already have one — we can confirm at a glance. For older panels there's no retroactive mandate, but the code direction reflects the reality that modern homes are full of electronics; retrofitting an SPD is a permitted, straightforward visit.
Last updated: 2026-07-05