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amps cutting off from loss of power
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<blockquote data-quote="helotaxi" data-source="post: 7059380" data-attributes="member: 550915"><p>If the alt was unable to sustain the average current demands of the system, the voltage would gradually drop as the batteries discharged and would stay down as long as the system is switched on. Drops to 10V only happen when there is a high resistance connection, the batteries are bad or the current draw is exceeding the CCA of the battery. Notice that the alt has nothing to do with that set of choices.</p><p></p><p>Bottom line, the alt is there to keep the average current demand satisfied. Transients are the realm of the batteries. Provided that the alt can cover the average, two batteries is no more of a load than one and there is no way that his system is drawing more, on average, than his alt can handle.</p><p></p><p>Wiring is the problem here. He's not drawing enough current to overpower the alt or the batteries. 10V would be a totally drained battery. If the drop is happening quickly, that rules out draining the batteries since that would take minutes of zero alternator input to occur. One the other hand, resistance based drops happen instantly and change with amp current demands since the current is what is actually causing the drop.</p></blockquote><p></p>
[QUOTE="helotaxi, post: 7059380, member: 550915"] If the alt was unable to sustain the average current demands of the system, the voltage would gradually drop as the batteries discharged and would stay down as long as the system is switched on. Drops to 10V only happen when there is a high resistance connection, the batteries are bad or the current draw is exceeding the CCA of the battery. Notice that the alt has nothing to do with that set of choices. Bottom line, the alt is there to keep the average current demand satisfied. Transients are the realm of the batteries. Provided that the alt can cover the average, two batteries is no more of a load than one and there is no way that his system is drawing more, on average, than his alt can handle. Wiring is the problem here. He's not drawing enough current to overpower the alt or the batteries. 10V would be a totally drained battery. If the drop is happening quickly, that rules out draining the batteries since that would take minutes of zero alternator input to occur. One the other hand, resistance based drops happen instantly and change with amp current demands since the current is what is actually causing the drop. [/QUOTE]
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amps cutting off from loss of power
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