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<blockquote data-quote="hatedonmostly" data-source="post: 7200426" data-attributes="member: 611322">The way I always understood it was that the alt acts as a tender to keep the voltage at 14.4. If voltage lowers, the alt will restore it to 14.4. Batteries also have a discharge voltage, which is usually 12.8-13v. Anything above the battery&#039;s discharge voltage is entirely handled by the alternator.So in theory, if the amps are drawing enough current to reach the battery discharge voltage, shouldn&#039;t the batteries:1. take the burden off of the alternator; which means that if you have a large battery bank, the voltage should stay around 13v and slowly drop, as the batteries are discharging to power the amps?2. the alt should charge the batteries while they are discharging; which means if the voltage should already stay around 13v from the batteries discharging, then alt charging them should increase the voltage a little? Making it a combined effort from the alt and the batteries?Theory is different from practice, but that seems to be how it should work...</blockquote>

[QUOTE="hatedonmostly, post: 7200426, member: 611322"] The way I always understood it was that the alt acts as a tender to keep the voltage at 14.4. If voltage lowers, the alt will restore it to 14.4. Batteries also have a discharge voltage, which is usually 12.8-13v. Anything above the battery's discharge voltage is entirely handled by the alternator. So in theory, if the amps are drawing enough current to reach the battery discharge voltage, shouldn't the batteries: 1. take the burden off of the alternator; which means that if you have a large battery bank, the voltage should stay around 13v and slowly drop, as the batteries are discharging to power the amps? 2. the alt should charge the batteries while they are discharging; which means if the voltage should already stay around 13v from the batteries discharging, then alt charging them should increase the voltage a little? Making it a combined effort from the alt and the batteries? Theory is different from practice, but that seems to be how it should work... [/QUOTE]

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