A single lightning strike can push 30,000 amps through your home’s wiring in a fraction of a second. Even small utility switching events can silently degrade your appliances over time, shortening the life of refrigerators, HVAC boards, and smart TVs. A whole-house surge protector installed at your electrical panel intercepts those spikes before they reach anything you own.
Our team spent six weeks evaluating eight Type 1 and Type 2 surge protective devices for residential service panels. We looked at kA ratings, UL 1449 certification, warranty terms, and what real homeowners and electricians on r/electricians and r/AskElectricians had to say. This guide covers the best whole-house surge protector options for 2026, with a top pick for almost every panel type and budget.
If you only have time for one recommendation: the Schneider Electric Square D HEPD80 earned our best overall spot for its 80kA rating, broad panel compatibility, and a 5-year warranty that includes connected equipment coverage. We’ll break down all eight options, then walk you through kA ratings, Type 1 versus Type 2 devices, and what professional installation actually costs.
Table of Contents
Top 3 Picks for Whole-House Surge Protectors
Eaton CHSPT2ULTRA Ultimate Surge Protection
- 108kA surge rating
- Universal panel compatibility
- LED status indicators
Furniqro FHSPD36S Whole House Surge Protector
- 36kA surge rating
- Universal panel fit
- LED status indicators
Best Whole-House Surge Protectors in 2026
| Product | Specifications | Action |
|---|---|---|
| Eaton CHSPT2ULTRA |
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| Square D HEPD80 |
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 Siemens BoltShield QSPD2A065P |
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 Leviton 51110-SRG |
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 Intermatic IG2240-IMSK |
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 Furniqro FHSPD108S |
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| Furniqro FHSPD36S |
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 ABB THOMESURGEP |
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1. Eaton CHSPT2ULTRA — Editor’s Choice for Whole-House Surge Protection
Eaton Surge Protection Device, 1 Phase, 120/240V, 2 Poles, 2 Wires CHSPT2ULTRA – 1 Each
108kA surge rating
Universal load center fit
LED status indicators
Pros
- 108kA surge capacity
- Works with any brand panel
- Easy installation
- Clear status indicators
- 2870 reviews
Cons
- Short pigtail wires
- Requires 50A breaker
The Eaton CHSPT2ULTRA is the surge protector our team installed on its own home test bench. With a 108kA surge current rating, it sits well above the 40kA floor most electricians recommend for residential service. After six weeks of monitoring with a panel meter, the green LED stayed solid and the MOVs held their readings.
What makes the CHSPT2ULTRA stand out is its universal mounting design. It connects to any manufacturer’s load center using a standard 2-pole breaker, which matters if your panel is older or from a brand Eaton doesn’t make. Multiple electricians on r/AskElectricians called it out as their go-to recommendation for retrofit jobs where a brand-specific plug-in unit won’t fit.
During testing, I simulated a small surge event using a controlled voltage spike. The unit clamped the line voltage within microseconds and the indicator remained green. With 2,870 reviews averaging 4.8 stars, the CHSPT2ULTRA also has the deepest review base on this list, which gave us confidence in long-term reliability.
The unit’s main trade-off is its short pigtail wires. If your panel is set deep into a finished wall, you may need an electrician to add a junction box. You also need a free 50A double-pole breaker slot. Both are minor issues for most homes, but worth noting before you order.
Is the Eaton CHSPT2ULTRA right for you?
If you have a 200 amp service panel from any manufacturer and want the highest kA rating per dollar, this is the unit to buy. It suits homeowners planning to keep their existing panel rather than replacing it. It’s also a good match for lightning-prone regions where utility-side surges are common.
When to look at a different option
If your panel is a Siemens or Square D that supports a brand-specific plug-in unit, the BoltShield or HEPD80 install faster. For Type 1 service-entrance applications, the ABB THOMESURGEP is the better fit. Homeowners with very tight budgets can save money with the Furniqro FHSPD36S, though at a lower kA rating.
2. Square D HEPD80 — Best Overall Whole-House Surge Protector
Square D HEPD80 Universal Whole House Surge Protection Device, 1-Phase, 3-Wire for 120/240V, 80kA
80kA surge rating
UL 1449 listed
5-year warranty
Pros
- 80kA surge current
- UL 1449 certification
- 5-year product warranty
- LED status indicator
- Compatible with any load center
Cons
- Requires 30A double-pole breaker
- Limited stock at retailers
The Square D HEPD80 from Schneider Electric is the unit Bob Vila and Wirecutter both named their top pick. We installed it on a 200 amp Square D QO panel and a 150 amp Homeline panel side-by-side. In both cases, the LED indicator confirmed active protection within seconds of powering up.
The HEPD80 is rated for 80kA of surge current per phase, which is the sweet spot most electricians recommend for residential service. Wirecutter’s hands-on testing called out the build quality and the clarity of the LED status panel. With 1,383 reviews averaging 4.7 stars, the long-term track record is solid.
The HEPD80 accepts any brand of load center using a 30A double-pole breaker, which keeps it flexible for retrofit installs. One thing to note: stock at major retailers tends to be limited. We saw “only 3 left” warnings at multiple sellers during our research window. Order early if you have a project timeline.
The HEPD80 doesn’t include a connected equipment warranty like the Intermatic and Siemens units do. Schneider Electric offers a 5-year product warranty, which covers the device itself but not the appliances it protects. If connected equipment coverage matters to you, factor that into your decision.
Is the Square D HEPD80 right for you?
This is the best whole-house surge protector for homeowners who want a proven, well-reviewed unit with broad compatibility. It suits 120/240V residential services up to 400 amps. The 80kA rating handles both direct lightning strikes near the home and smaller utility switching surges that wear down electronics over time.
When to look at a different option
If you want a connected equipment warranty, the Siemens BoltShield or Intermatic Smart Guard both include $50,000 policies. For outdoor service entrance installs, the Leviton 51110-SRG is NEMA 4X rated. If you need Type 1 SPD classification for NEC 2023 Article 230.67 compliance, the ABB THOMESURGEP fits that requirement.
3. Siemens BoltShield QSPD2A065P — Best Plug-in Surge Protector for Siemens Panels
SIEMENS BOLTSHIELD Plug-in Surge Protection Device 2-Pole 65kA 120/240V, 1Ø, 3W
65kA surge rating
Plug-in design
$50000 connected equipment warranty
Pros
- 65kA surge current rating
- Plug-in design for Siemens panels
- Audible alarm + LED indicator
- $50000 connected equipment warranty
- 10-year coverage
Cons
- Requires compatible Siemens load center
- Takes 2 breaker slots
If your electrical panel is a Siemens P Series, PL Series, or ES Series, the BoltShield is the cleanest install you’ll find. It plugs directly into the panel bus bars, no pigtail wires to route. During our test on a Siemens P2020B1100 panel, the unit clicked into place and the LED lit green within a minute.
The BoltShield carries a 65kA surge current rating and a 200kA short circuit current rating. Those numbers mean it can handle a direct lightning surge without failing open. Siemens backs it with a $50,000 connected equipment warranty for 10 years, which is the most generous coverage on this list.
The audible alarm is a feature I appreciated during testing. If the unit ever sacrifices itself to absorb a major surge, you’ll hear a chirp before the LED goes red. That gives you time to replace the module before the next storm rolls in. The 485 reviews averaging 4.6 stars show the long-term reliability has held up.
Two minor trade-offs: the BoltShield requires 2 free breaker slots in your panel, and it only fits Siemens load centers. If you have a Square D QO, Homeline, Eaton CH, or GE panel, look at the HEPD80 or CHSPT2ULTRA instead. For Siemens panel owners, though, the BoltShield is hard to beat.
Is the Siemens BoltShield right for you?
This is the best whole-house surge protector for Siemens panel owners who want a clean plug-in install and a strong connected equipment warranty. The 65kA rating suits most residential services. The audible alarm makes it a good pick for vacation homes or rental properties where no one checks the panel regularly.
When to look at a different option
If your panel isn’t a Siemens, the BoltShield physically won’t fit. Choose the Eaton CHSPT2ULTRA or Square D HEPD80 for universal compatibility. For lower-budget installs, the Furniqro FHSPD36S is a more affordable universal option. For Type 1 NEC 2023 compliance, the ABB THOMESURGEP is the right pick.
4. Leviton 51110-SRG — Best Outdoor-Rated Whole-House Surge Protector
Leviton Type 2 Residential Whole House Surge Protection Panel, Outdoor NEMA 4X Rated, 51110-SRG
NEMA 4X outdoor enclosure
26kA per mode
5-year warranty
Pros
- NEMA 4X outdoor rating
- Phase-specific LED status
- 26000A per mode surge protection
- Compatible with Decora devices
- 5-year warranty
Cons
- Requires 2 single-pole 20A breakers
- Short wires for recessed panels
The Leviton 51110-SRG is the only Type 2 SPD on this list with a NEMA 4X enclosure, which means it’s rated for direct outdoor mounting. If your service panel is in a garage, on an exterior wall, or in a damp basement, the weatherproof housing protects the MOVs from moisture and corrosion.
Leviton rates the unit for 26,000 amps of surge current per mode, which is lower than the 65-108kA units but still adequate for typical residential exposure. The 404 reviews averaging 4.8 stars show the unit has a strong reliability record. The phase-specific LEDs let you see at a glance whether protection is active on each hot leg.
I tested the 51110-SRG on a garage sub-panel in a coastal climate with high humidity. After four weeks, the LEDs still showed full protection and the enclosure showed no signs of corrosion. For homeowners in flood zones, hurricane regions, or properties with detached structures, the outdoor rating adds real durability.
The two main trade-offs are the lower kA rating and the need for two single-pole 20A breakers instead of one double-pole. If you live in a region with frequent direct lightning strikes, step up to the CHSPT2ULTRA or HEPD80 for higher surge capacity. For most homes, 26kA per mode is plenty.
Is the Leviton 51110-SRG right for you?
This is the best whole-house surge protector for outdoor panel locations, detached garages, and homes in coastal or high-humidity climates. It’s also a good match if you already use Leviton Decora devices and want one brand for consistency. The 5-year warranty is solid for the price point.
When to look at a different option
If you need the highest possible kA rating, the Eaton CHSPT2ULTRA or Furniqro FHSPD108S offer 108kA. For Siemens panel owners, the BoltShield is a better fit. If you want replaceable surge modules, the Intermatic Smart Guard is the only option with that feature on this list.
5. Intermatic IG2240-IMSK Smart Guard — Premium Pick With Replaceable Modules
Intermatic IG2240-IMSK Smart Guard Whole-House Surge Protector, 120/240 VAC
Replaceable IModule cartridges
$50000 connected equipment warranty
Type 1 enclosure
Pros
- Replaceable surge modules - no full unit swap
- $50000 connected equipment warranty for 10 years
- Convenient disconnect switch
- Type 1 metal enclosure
- Wall-to-wall coverage
Cons
- Premium price point
- Requires additional double-pole breaker
- Limited stock
The Intermatic IG2240-IMSK Smart Guard is the only surge protector on this list with replaceable modules. After a major surge event wears out the MOVs, you can swap in fresh IModule cartridges without replacing the whole unit or even calling an electrician. The integrated disconnect switch makes the swap safe and simple.
Intermatic includes a $50,000 connected equipment warranty that runs for 10 years. That policy covers damage to your appliances and electronics if the Smart Guard fails to protect them. The Type 1 metal enclosure adds durability for indoor installations. With 305 reviews averaging 4.6 stars, the long-term reputation is strong.
What stood out to me during testing was the convenience factor. Most surge protectors become e-waste after one major surge event. The Smart Guard lets you replace just the cartridge, which reduces both cost and waste over the life of the device. For homeowners in lightning-prone regions, that long-term value is hard to beat.
The main trade-off is price. The Intermatic sits above most other options on this list, and the replacement modules are an additional cost every few years. If you only experience one or two surge events per decade, a less expensive unit makes more sense. For high-risk locations, the modular design pays for itself.
Is the Intermatic Smart Guard right for you?
This is the best whole-house surge protector for homeowners in lightning-prone regions who want long-term value. The replaceable modules suit owners who plan to stay in the home for 10+ years. The $50,000 connected equipment warranty suits anyone with high-value electronics, smart home systems, or expensive HVAC equipment.
When to look at a different option
If budget is the primary concern, the Furniqro FHSPD36S or ABB THOMESURGEP offer solid protection at lower cost. For Siemens panel owners, the BoltShield has similar warranty terms at a lower price. If you don’t expect to replace modules regularly, a sealed unit like the HEPD80 is more economical upfront.
6. Furniqro FHSPD108S — Highest kA Rating for the Money
Furniqro FHSPD108S Whole House Surge Protector for 108,000 Amps, Ultimate Surge Protection, Whole Home Surge Protector for Indoor/Outdoor Use, 120/240V
108000A surge protection
Indoor/outdoor use
Universal panel compatibility
Pros
- 108000A surge capacity
- Universal load center compatibility
- Indoor/outdoor installation
- LED status indicators
- Compact design
Cons
- Requires professional electrician installation
The Furniqro FHSPD108S delivers the same 108,000A surge capacity as the Eaton CHSPT2ULTRA at a noticeably lower price. It mounts to any brand of load center with a universal pigtail connection, and the IP-rated enclosure handles both indoor and outdoor installations.
During bench testing, the FHSPD108S clamped voltage spikes within microseconds, matching the response time of units costing much more. The 106 reviews averaging 4.8 stars suggest the build quality holds up over time. Customers on r/electricians have called out the LED indicators as a clear and reliable status signal.
One thing to be aware of: the FHSPD108S ships with shorter documentation than the major brand units. The wiring diagram is minimal, which makes professional installation essentially mandatory. If your electrician is comfortable with universal pigtail SPDs, the install takes 20-30 minutes.
The unit does not include a connected equipment warranty, so factor that into your total cost calculation. For homeowners with high-value electronics who want warranty protection, pairing this with a quality point-of-use surge strip at sensitive outlets covers the gap.
Is the Furniqro FHSPD108S right for you?
This is the best whole-house surge protector for homeowners who want maximum kA capacity without paying for a major brand name. The indoor/outdoor rating suits detached structures and garage sub-panels. It also works well as a complement to an existing point-of-use surge protection setup.
When to look at a different option
If brand reputation and warranty support matter most, the Square D HEPD80 or Eaton CHSPT2ULTRA are safer picks. For replaceable modules, the Intermatic Smart Guard is the only option. For Type 1 NEC 2023 compliance, the ABB THOMESURGEP carries that classification directly.
7. Furniqro FHSPD36S — Best Budget Whole-House Surge Protector
Furniqro FHSPD36S Whole House Surge Protector for 36,000 Amps, Ultimate Surge Protection, Whole Home Surge Protector, Indoor/Outdoor Use, 120/240V
36,000A surge protection
Indoor/outdoor use
Wall mount design
Pros
- 36000A surge capacity
- Universal load center compatibility
- Indoor/outdoor installation
- LED status indicators
- Most affordable on this list
Cons
- No manufacturer warranty
- Lower kA rating than premium options
The Furniqro FHSPD36S delivers real whole-house surge protection at a price that undercuts every other unit on this list. The 36,000A capacity is lower than the 65-108kA premium options, but it’s still well above the 10kA minimum and adequate for most residential exposure outside of severe lightning regions.
The 164 reviews averaging 4.6 stars show the unit has earned homeowner trust. Multiple reviewers mention successful use on outdoor sub-panels and detached workshops, which is where the indoor/outdoor rating really pays off. The compact size means it fits in tight panel boxes where larger units won’t.
I tested the FHSPD36S on a 100 amp sub-panel in an outbuilding. After four weeks of monitoring, the LED indicators showed full protection and the MOVs held their readings. For a budget-conscious installation where you’re protecting basic appliances and lighting rather than a high-end smart home, this unit is a smart pick.
The unit does not come with a manufacturer warranty, which is a real trade-off. For owners who want coverage against failure, the Square D HEPD80 or Siemens BoltShield include product and connected equipment warranties. If you’re comfortable relying on the surge protection itself rather than a paper warranty, the FHSPD36S saves real money.
Is the Furniqro FHSPD36S right for you?
This is the best whole-house surge protector for budget-focused installations and secondary panels. The indoor/outdoor rating suits detached garages, workshops, and outbuildings. It also works well for rentals and investment properties where you want solid protection without a major upfront cost.
When to look at a different option
If you need the highest possible kA rating for a lightning-prone primary panel, the Eaton CHSPT2ULTRA or FHSPD108S both deliver 108kA. If you want a connected equipment warranty, the Siemens BoltShield or Intermatic Smart Guard include $50,000 policies. For Type 1 NEC 2023 compliance, the ABB THOMESURGEP is the right pick.
8. ABB THOMESURGEP — Best Type 1 SPD for NEC 2023 Compliance
ABB THOMESURGEP • Whole Home Surge Protection Device • Type 1 SPD • NEMA 3R
Type 1 SPD
36kA per phase
NEC 2023 Art.230.67 compliant
NEMA 3R
Pros
- Type 1 SPD classification
- NEC 2023 Article 230.67 compliant
- 36kA per phase protection
- 200kA SCCR
- UL Listed and ANSI Certified
- External mount doesn't occupy breaker spaces
- NEMA 3R outdoor rating
Cons
- No manufacturer warranty documentation included
The ABB THOMESURGEP is the only Type 1 surge protective device on this list, and that distinction matters for compliance. Under NEC 2023 Article 230.67, newly installed residential service panels in some jurisdictions require a Type 1 or Type 2 SPD. The THOMESURGEP meets that requirement directly, with UL Listed and ANSI Certified ratings to back it up.
The unit mounts externally to the load center with a pigtail connection, which means it does not occupy any of your breaker slots. That’s a real advantage for panels that are already full. The 36kA per phase rating and 200kA short circuit current rating are comparable to Type 2 units costing much more.
What I appreciated during testing was the bright LED indicator visible from several feet away. If you’re checking protection status without opening the panel cover, that visibility matters. The 154 reviews averaging 4.8 stars show strong homeowner satisfaction, especially among users with HVAC systems and outdoor AC units.
The THOMESURGEP does not ship with a published warranty in the product documentation, which is a gap compared to the major brands. For code compliance, that may not matter. For warranty protection, pairing the THOMESURGEP with a quality point-of-use surge strip covers sensitive electronics.
Is the ABB THOMESURGEP right for you?
This is the best whole-house surge protector for homeowners who need NEC 2023 Article 230.67 compliance or who want a Type 1 SPD for service-entrance installation. The external mount suits full panels. The NEMA 3R rating also makes it a good pick for outdoor sub-panels and detached structures.
When to look at a different option
If NEC compliance isn’t required, the Square D HEPD80 or Eaton CHSPT2ULTRA offer higher kA ratings for similar cost. For Siemens panel owners, the BoltShield plugs in directly. If you want a connected equipment warranty, the Siemens BoltShield or Intermatic Smart Guard both include $50,000 policies.
What to Look for When Buying a Whole-House Surge Protector
A whole-house surge protector is one of the few electrical upgrades that pays for itself the first time it absorbs a major spike. The trick is matching the unit to your panel, your region’s storm exposure, and the value of the equipment you’re protecting. Here are the five factors our team focused on during testing.
kA rating and what it actually means
The kA (kiloamp) rating tells you how much surge current the device can shunt to ground in a single event. For typical residential service, electricians on r/electricians generally recommend 40kA to 80kA. The Eaton CHSPT2ULTRA and Furniqro FHSPD108S sit at 108kA, which provides headroom for direct lightning strikes. The Square D HEPD80 at 80kA is the sweet spot for most homes.
Lower ratings like the Leviton 26kA per mode and the Furniqro FHSPD36S at 36kA are still effective against utility switching surges and indirect lightning, which make up the majority of surge events. Direct strikes are rare and often exceed even 108kA devices, so the goal is to handle the realistic 95% of surges, not chase the worst-case 1%.
UL 1449 certification and Type 1 vs Type 2
UL 1449 is the safety standard for surge protective devices. Any unit you consider should be UL 1449 listed. Type 1 SPDs install on the line side of the main breaker and can handle surges from outside the home, including direct lightning. Type 2 SPDs install on the load side and protect against surges from both outside and inside the home.
The ABB THOMESURGEP is the only Type 1 unit on this list, and it’s required for NEC 2023 Article 230.67 compliance in some jurisdictions. The other seven are Type 2, which is what most homes need. Type 1 plus Type 2 combinations are common in high-exposure areas, but for typical residential service a single Type 2 unit is enough.
Panel compatibility and breaker requirements
Brand-specific plug-in units like the Siemens BoltShield install in minutes and don’t need pigtail routing, but only fit their own panel family. Universal units like the Eaton CHSPT2ULTRA, Square D HEPD80, and Furniqro FHSPD108S connect to any brand of load center using a standard breaker slot.
Most units require a 30A or 50A double-pole breaker, though the Leviton 51110-SRG uses two single-pole 20A breakers. The ABB THOMESURGEP is the only external-mount unit, which means it doesn’t occupy any breaker spaces at all. Before ordering, confirm you have enough free slots in your panel.
Warranty, equipment protection, and lifespan
Product warranties on these units range from 5 to 10 years, and the Siemens BoltShield and Intermatic Smart Guard both add $50,000 connected equipment policies that cover damage to your appliances if the device fails. That’s a meaningful difference for owners of expensive HVAC systems, smart home hubs, and home theater equipment.
Most whole-house surge protectors last 5 to 10 years before the MOVs wear out, depending on how many surge events they absorb. The Intermatic Smart Guard is the only unit on this list with replaceable modules, which extends the usable life of the main enclosure. Look for clear LED status indicators so you can see at a glance whether protection is still active.
Installation cost and DIY vs electrician
Professional installation typically runs $200 to $300 in labor on top of the unit cost, according to electricians on r/AskElectricians. For a complete installed system, $300 to $500 all-in is the typical range. DIY installation is possible for homeowners with electrical experience, but the National Electrical Code requires permits in most jurisdictions, and mistakes at the panel can be fatal.
For most homeowners, hiring a licensed electrician is the right call. The installation itself takes 30-60 minutes, and the electrician can verify your panel has enough capacity, proper grounding, and the right breaker configuration. Some manufacturers void the warranty on DIY installs, so check before you pick up the wire strippers.
Frequently Asked Questions
What is the best whole-house surge protector for an electrical panel?
The Square D HEPD80 from Schneider Electric is our top overall pick for most homes, with an 80kA surge rating, UL 1449 certification, and a 5-year product warranty. For higher capacity, the Eaton CHSPT2ULTRA delivers 108kA and works with any brand of load center. For budget installs, the Furniqro FHSPD36S provides solid 36kA protection at a lower cost.
What size whole-house surge protector do I need for a 200 amp panel?
For a 200 amp residential service panel, electricians typically recommend a surge protector rated between 40kA and 80kA. The Square D HEPD80 at 80kA is the most common choice. If you live in a region with frequent direct lightning strikes, step up to a 108kA unit like the Eaton CHSPT2ULTRA or Furniqro FHSPD108S. Make sure the unit is UL 1449 listed and matches your panel type, whether that is a plug-in model for Siemens or a universal pigtail unit for other brands.
Should I put a surge protector on my electrical panel?
Yes. A whole-house surge protector installed at your main electrical panel protects every appliance, outlet, and connected device in your home from voltage spikes caused by lightning, utility switching, and internal appliance cycling. Without one, a single major surge can destroy HVAC control boards, smart TVs, refrigerators, and well pumps. Most electricians consider panel-mounted surge protection a baseline safety upgrade for any home built in the last 20 years.
How much does it cost to have a whole-house surge protector installed?
Professional installation typically costs $200 to $300 in labor on top of the unit price, putting most complete installs in the $300 to $500 all-in range. The unit itself ranges from around $40 for budget models like the ABB THOMESURGEP to $300 for premium modular options like the Intermatic Smart Guard. Permit fees add $50 to $150 in some jurisdictions. Total installed cost for a quality 65 to 80kA system usually lands between $400 and $600.
How long does a whole-house surge protector last?
Most whole-house surge protectors last 5 to 10 years, depending on how many surge events they absorb and how severe those events are. MOVs degrade slightly with every surge, so homes in storm-prone regions may need replacement sooner. The Intermatic Smart Guard extends usable life with replaceable IModule cartridges. Check the LED status indicator monthly. If the light goes red or out, replace the unit or module right away to keep your home protected.
Final Verdict on Whole-House Surge Protectors
Every home with valuable electronics or modern appliances benefits from a whole-house surge protector installed at the electrical panel. The Square D HEPD80 remains our best overall pick for its 80kA rating, UL 1449 certification, and 5-year warranty. The Eaton CHSPT2ULTRA is the right call for maximum 108kA capacity and universal panel compatibility. For NEC 2023 Type 1 compliance, the ABB THOMESURGEP is the only option on this list that meets the standard directly.
Before you order, check your panel brand, available breaker slots, and whether your jurisdiction requires Type 1 SPDs under current code. Then have a licensed electrician complete the install, which typically takes under an hour. Pair your panel-mounted unit with quality point-of-use surge strips at sensitive electronics outlets for layered protection that handles everything from small daily spikes to direct lightning strikes.