m4n1akx Posted January 11, 2023 Report Share Posted January 11, 2023 I have about 3500W subw power. The alternator has 140A and I have a lead acid battery of 90Ah , do I need an extra battery? How big? Is it bad if I put another lead acid? Is there a formula? Thanks Link to comment Share on other sites More sharing options...
BassMunky Posted January 11, 2023 Report Share Posted January 11, 2023 Get rid both batteries get a agm man Shakin not Stirred....my buildhttp://www.stevemead...ngle-cab-build/412 CVX And put a sealed enclosure in your trunk cut a hole in your deck and call it ported Link to comment Share on other sites More sharing options...
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