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<blockquote data-quote="jsloan10" data-source="post: 947558" data-attributes="member: 560397">I would go with just one if I were you and use an alt rated for no more than 140amps peak output then add a second battery.For dual batts there are 2 ways of doing it-You can do it like they do in deisel trucks and run two identical batterys in parrallel, this way you will have alot more available current for the system.In this setup the batterys need to be Identical to avoid having the batterys pull current off of each other, this shortens the life of the batterys considerably so two Identical batterys (age/type/brandname) are recommended for maximum reliabilty.If you want to use a two different batterys you need to use an isolator. Your regular battery will run the factory electrical system and the second battery will run your amps. The Isolator works by allowing both batterys to charge off the same alternator but stops the batterys from drawing current from each other.</blockquote>

[QUOTE="jsloan10, post: 947558, member: 560397"] I would go with just one if I were you and use an alt rated for no more than 140amps peak output then add a second battery. For dual batts there are 2 ways of doing it- You can do it like they do in deisel trucks and run two identical batterys in parrallel, this way you will have alot more available current for the system. In this setup the batterys need to be Identical to avoid having the batterys pull current off of each other, this shortens the life of the batterys considerably so two Identical batterys (age/type/brandname) are recommended for maximum reliabilty. If you want to use a two different batterys you need to use an isolator. Your regular battery will run the factory electrical system and the second battery will run your amps. The Isolator works by allowing both batterys to charge off the same alternator but stops the batterys from drawing current from each other. [/QUOTE]

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