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Wiring, Electrical & Installation
Help with Charging problem (stuck at 12.3 volts)
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<blockquote data-quote="Controller" data-source="post: 7247215" data-attributes="member: 631108"><p>Now here is my story;</p><p></p><p>I have a 18'' fi btl sub and a 4000watt amp being powered by 5 batteries (one up front and 4 in the cab)</p><p></p><p>I recently had to change the batteries because they all started going bad (just really old, no problems that i know of)</p><p></p><p>The first batteries i had were cheap 650 crank amp used car batteries, and the new ones i just bought are 4 Red Top Ultima 1000 crank amp batteries and one normal interstate up under the hood.</p><p></p><p>My problem is this;</p><p></p><p>As soon as i connected all the new batteries (positives to positives &amp; negatives to negatives), the voltage is like stuck at 12.3 and will not go any higher, almost like its capped out</p><p></p><p>The voltage drops to 11.8 when i slam the sub hard, in tern cutting out the amp since it doesn't get the power it wants.</p><p></p><p>However the altenator charges it back up to 12.3 VERY fast so i dont think the alt is bad</p><p></p><p>Yes all the batteries are connected to the front battery which is connected to the alternator, which is 100 amp. (not that high i know but it is after market and worked fine for 4 years charging 5 batteries constantly, and even though its getting kinda old, it still charges fine)</p><p></p><p>My Question is;</p><p></p><p>What is the problem that is causing my voltage to be stuck at 12.3 even though they are all brand new batteries (and all good), and how can i fix this.</p><p></p><p>PLEASE help.</p></blockquote><p></p>
[QUOTE="Controller, post: 7247215, member: 631108"] Now here is my story; I have a 18'' fi btl sub and a 4000watt amp being powered by 5 batteries (one up front and 4 in the cab) I recently had to change the batteries because they all started going bad (just really old, no problems that i know of) The first batteries i had were cheap 650 crank amp used car batteries, and the new ones i just bought are 4 Red Top Ultima 1000 crank amp batteries and one normal interstate up under the hood. My problem is this; As soon as i connected all the new batteries (positives to positives & negatives to negatives), the voltage is like stuck at 12.3 and will not go any higher, almost like its capped out The voltage drops to 11.8 when i slam the sub hard, in tern cutting out the amp since it doesn't get the power it wants. However the altenator charges it back up to 12.3 VERY fast so i dont think the alt is bad Yes all the batteries are connected to the front battery which is connected to the alternator, which is 100 amp. (not that high i know but it is after market and worked fine for 4 years charging 5 batteries constantly, and even though its getting kinda old, it still charges fine) My Question is; What is the problem that is causing my voltage to be stuck at 12.3 even though they are all brand new batteries (and all good), and how can i fix this. PLEASE help. [/QUOTE]
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Help with Charging problem (stuck at 12.3 volts)
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