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#1 in Whole-House Surge ProtectorsBest Overall
Siemens FS140 Boltshield
Siemens
$260.00 – $340.00
A 140,000-amp whole-house Type 2 SPD with commercial-grade MOVs, diagnostic LEDs, and a 5-year connected-equipment warranty up to $75,000. Widely regarded as the gold standard for residential panel protection.
9.4
Excellent
Consensus
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.
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