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<blockquote data-quote="bubbagumper6" data-source="post: 8261819" data-attributes="member: 567719">Gah, so much misinformation in one thread it&#039;s sad.&nbsp; Please don&#039;t offer advice unless you really know what you&#039;re talking about, and just because you read something on a forum once doesn&#039;t mean it&#039;s true!Batteries do not share the load with the alternator, period.Most batteries rest at around ~12.5-13V while most alternators charge at 14-14.5V.&nbsp; So while the car is running the system voltage is over 14V, anything that&#039;s below that system voltage (i.e. batteries) can only be a LOAD on the system, they cannot SUPPLY anything, they can only consume.&nbsp; So with the car running 100% of your power comes from your alternator provided it can provide that power.Now, where batteries come into play is if your alternator CANNOT provide that power.&nbsp; If you try to draw 200A from a 130A alternator, it&#039;s obviously not going to be able to keep up so the system voltage falls.&nbsp; Once the system voltage falls to the battery resting voltage they will begin to supply the system.&nbsp; This is VERY HARD ON YOUR ALTERNATOR though and will cause it to fail prematurely.Once this condition is over and the amplifier is no longer drawing more than the alternator can provide (i.e. the particular bassnote is done) the system voltage will rise back to the alternator voltage and at this point the batteries are once again a drain on the system, much more so than before because now they&#039;ve been discharged somewhat and need to be recharged.</blockquote>

[QUOTE="bubbagumper6, post: 8261819, member: 567719"] Gah, so much misinformation in one thread it's sad. Please don't offer advice unless you really know what you're talking about, and just because you read something on a forum once doesn't mean it's true! Batteries do not share the load with the alternator, period. Most batteries rest at around ~12.5-13V while most alternators charge at 14-14.5V. So while the car is running the system voltage is over 14V, anything that's below that system voltage (i.e. batteries) can only be a LOAD on the system, they cannot SUPPLY anything, they can only consume. So with the car running 100% of your power comes from your alternator provided it can provide that power. Now, where batteries come into play is if your alternator CANNOT provide that power. If you try to draw 200A from a 130A alternator, it's obviously not going to be able to keep up so the system voltage falls. Once the system voltage falls to the battery resting voltage they will begin to supply the system. This is VERY HARD ON YOUR ALTERNATOR though and will cause it to fail prematurely. Once this condition is over and the amplifier is no longer drawing more than the alternator can provide (i.e. the particular bassnote is done) the system voltage will rise back to the alternator voltage and at this point the batteries are once again a drain on the system, much more so than before because now they've been discharged somewhat and need to be recharged. [/QUOTE]

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