Best Whole-House Surge Protectors
Top whole-house surge protectors ranked by transparent trust scores.
8 products ranked
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Top Pick
9.4
Excellent
Siemens FS140 Boltshield
Ranked #1 based on expert reviews, user sentiment, and value analysis.
#1
9.4
Excellent
Consensus
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Ranked #1 based on expert reviews, user sentiment, and value analysis.
Pros
- 140kA surge capacity
- Strong connected-equipment warranty
- Clear protection status LEDs
Cons
- Bulky enclosure beside the panel
- Costs double basic SPDs
Don't buy this if…
- Do not install any panel SPD on a long wire run, since every extra inch of lead length raises let-through voltage.
#2
9.2
Excellent
Consensus
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Ranked #2 based on expert reviews, user sentiment, and value analysis.
Pros
- Excellent protection per dollar
- Compact side-of-panel mounting
- All-mode MOV coverage
Cons
- Status is basic LED only
- Warranty claims require documentation discipline
Don't buy this if…
- Skip warranty-based comfort if you will not register the product, because unregistered claims get denied.
#3
9.0
Excellent
Consensus
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Ranked #3 based on expert reviews, user sentiment, and value analysis.
Pros
- Type 1 rated for line-side installs
- Compact sealed design
- Trusted Square D pedigree
Cons
- Lower kA rating than premium units
- Single status LED only
Don't buy this if…
- Do not treat 80kA as lifetime protection in lightning country, since MOVs sacrifice capacity with every strike absorbed.
#4
8.7
Excellent
Consensus
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Ranked #4 based on expert reviews, user sentiment, and value analysis.
Pros
- Field-replaceable surge modules
- Audible failure alarm
- Robust NEMA enclosure
Cons
- Larger footprint
- Module replacements cost meaningful money
Don't buy this if…
- Avoid it in bedrooms-adjacent utility closets, because the failure alarm is loud by design.
#5
8.5
Excellent
Consensus
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Ranked #5 based on expert reviews, user sentiment, and value analysis.
Pros
- Safe-failing TPMOV technology
- Individual replaceable modules
- Seven-mode protection
Cons
- Less brand recognition with electricians
- Enclosure is utilitarian
Don't buy this if…
- Do not forget module checks after storm seasons, since a spent module means that phase is unprotected.
#6
8.3
Good
Consensus
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Ranked #6 based on expert reviews, user sentiment, and value analysis.
Pros
- Zero-lead-length breaker-slot install
- No wall space required
- Doubles as two 20A breakers
Cons
- Only fits Siemens load centers
- 20kA rating suits milder surge environments
Don't buy this if…
- Skip breaker-style SPDs in high-lightning regions, because their compact MOVs absorb less before retiring.
#7
8.1
Good
Consensus
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Ranked #7 based on expert reviews, user sentiment, and value analysis.
Pros
- Affordable entry to real panel protection
- Same easy install as the Ultra
- Compact housing
Cons
- Lower capacity and warranty than Ultra
- No equipment coverage tier
Don't buy this if…
- Do not cheap out at this tier if you run a home office on expensive gear, since the Ultra's warranty gap costs more than the price difference.
#8
7.9
Good
Consensus
Compare
Ranked #8 based on expert reviews, user sentiment, and value analysis.
Pros
- 100kA at a budget price
- 10-year product warranty
- Commercial engineering DNA
Cons
- No connected-equipment warranty
- Consumer documentation is thin
Don't buy this if…
- Avoid it if warranty-backed equipment coverage matters to you, since Ditek covers only the device itself.
Quick Comparison
How We Rank
Composite trust score from expert reviews, user sentiment, complaint analysis, and value assessment.
Trust Score
Weighted composite of all factor scores
Expert Score
Aggregated expert review ratings
User Sentiment
Community votes and review analysis
Value Score
Price-to-performance ratio
Freshness
Recency of reviews and data
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