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Message: <blockquote data-quote="Villeza1" data-source="post: 6705528" data-attributes="member: 608393">It will still pull from the front batt if they share the same alt. You'd need a sec alt to charge just the system.For 1-2 rear batt applications, is best to have power/ground wire from the front batt to the rear batt. Also grounding the rear batt to chasis/frame. Then the amp will be connected to the rear batt pos/neg.If you only want to charge the rear batt while the vehicle is on, then you'd need an iso. The iso can be mounted under the hood or near the rear batt.What's your electrical consist of?</blockquote>

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