Surge Guard 44390 Portable Surge Protector with Enhanced Diagnostics - 50 AMP GPS Systems It automatically detects when your

It automatically detects when your engine is running and only draws power when the alternator is supplying it

Open circuit/no power

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Surge Guard 44390 Portable Surge Protector with Enhanced Diagnostics - 50 AMP GPS Systems It automatically detects when yourThis is the Surge Guard 50 Amp 44390 Surge protector, and can protect your RV against up to 4200 joules. This is a perfect unit for travel trailers, pop ups and any smaller type RV. This unit also will test for and indicate for the following: Open neutral Open ground Reverse polarity Open circuit no power Missing leg 1 2 voltage Surge protection status Overheating plug receptacle Other features include a fully enclosed receptacle cover, increased