12V 200Amp Mobile Audio Battery Isolator High Current Continuous Solenoid Relay | Fits for White Rodgers, Trombetta, Prestolite, Johnson Electric | OE#: 586-902 586-105111 114-1211-020 SBJ4201 SO51221
It can be used in vans, RVs, or boats to isolate the house batteries from the alternator and starter battery when the engine isn't running. It can also be used to isolate two lead-acid batteries from one another to prevent one from drawing down the other.
Product Includes: 1X Solenoid Relay with Bolts & Washers