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Message: <blockquote data-quote="loopkiller" data-source="post: 5701437" data-attributes="member: 601690">I pretty much agree with SWFL that two Group 31 batteries in the rear should do you just fine. One might get you by with a strong alt, but since your alt can only give you about 1700W effective output (150A x 14.4V x 80% efficiency = 1728). The rest is going to come from battery. The more batteries you have, the higher the voltage will be at the amp. You effectively split the load between two batteries instead of all on one.So I would move the HC1800 under the hood and add in two HC2400 in the trunk. If you wanted to do it "by the book", you would isolate the rear bank. That is up to you. It is not necessary, but it will extend the lifespan of the batteries.</blockquote>

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