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Camco
$150.00 – $200.00
30-amp portable unit with 2800 joules of surge protection plus automatic shutoff on voltage outside the 104 to 132V safe band. Simple LED diagnostics cover open ground, open neutral, and reverse polarity.
Camco Power Defender 30-Amp Voltage Protector
From $150
Southwire
$330.00 – $420.00