The reasons behind it are so that all your accessories are ran off your secondary battery so that you don't cause to much a voltage drop on all your primary running component's like your ECU and in Honda Pioneer 1000 and Talons its extremely important to keep voltage in normal range for the transmission to work properly. The battery isolator will not allow the secondary battery and accessories to draw voltage down on the OEM battery. Winches especially can have a big Amp Draw taxing the charging system. True Isolator is designed to work with a stator type charging system and is a excellent choice to use.
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