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Message: <blockquote data-quote="bubbagumper6" data-source="post: 6815469" data-attributes="member: 567719"><p>so 110A, and that would have to make it 100% efficient (which most stock alts aren't, but lets assume it is).  I believe the usual estimate for what the car uses, is something like 50-60A  So leaves maybe 50A for anything else (your system) that's about 700w at 14V.  However this would also assume your amp is 100% efficient...which it's not.  Like I said, batteries help, but if your electrical system to truly be sufficient, you'll need a larger alt.</p></blockquote><p></p>

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