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<blockquote data-quote="VWBobby" data-source="post: 7359607" data-attributes="member: 624844">They see me trollin, they&#039;re hatin....&nbsp; I&#039;ll take the bait.&nbsp; &nbsp; //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gifA battery bank can be a band-aid fix for an improper charging system.&nbsp; Here&#039;s how:1) Nobody draws 100% full power, 90% of the time.&nbsp; If you were to build a &quot;burp machine&quot; that was only good for full RMS power on test tones, and shut off the engine, never allowing the batteries to charge back up - this *would* be an exception.&nbsp; However, when you are done running a burp, you can leave the vehicle running to charge your battery bank back up.&nbsp; Depending on how far the bank is drained, and what capacity alternator you have, is how long the engine will need to be left running.2) On the quiet/silent parts of the music, the system may be drawing as little as 10% of your reserve capacity.&nbsp;&nbsp; This means, on a 100A charging system, with an idle draw of 40amps, you still have 54 amps available to charge the battery (60 minus 10% = 54).3) Alternators differ from generators in the fact that they take AC power and rectify it to DC.&nbsp;&nbsp; If the battery(s) is still in good condition then it will accept a charge.&nbsp; A &quot;bad&quot; battery will have a greatly reduced capacity and won&#039;t be able to hold a charge under these conditions, no matter how many amps you throw at it.&nbsp; Generally a battery must be sulfated, corroded or leaking in order for it to lose its capacity.4) Most &quot;burp machines&quot; that are not used for daily driving, have 1 regular or high capacity alternator.&nbsp; The owner will charge up the battery bank with a typical 100-250 amp quick charger before each comp.&nbsp;&nbsp; If the comp rules allow for the engine to be running, this will give the competitor an edge having high operating voltage during their run.&nbsp; Otherwise you can still &quot;cheat&quot; by using a 16 volt system, with the engine off, if the rules allow.I always get a laugh out of the guys with the 4-5 high output alternators....&nbsp; What&#039;s the point?&nbsp; You would have to be burping at full capacity and shutting your car off afterwards, without letting your batteries charge back up.&nbsp; I don&#039;t know too many people who run their cars just to bass, then turn them right back off again.A 100 amp alternator can charge several drained batteries just as well as a bank of alternators putting out 1000 amps.&nbsp; It will just take 10 times longer to charge.&nbsp; Its not like the alternator will burn itself up by putting out full capacity.&nbsp; That&#039;s what the rectifier and voltage regulator circuitry is for.&nbsp; It will just be running at full duty cycle until the battery bank is charged back up to capacity. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif&nbsp; The only time I have seen a damaged alternator was due to improper grounds, reversed polarity, or overheating (from the engine).(puts on flame proof suit and ducks for cover)</blockquote>

[QUOTE="VWBobby, post: 7359607, member: 624844"] They see me trollin, they're hatin.... I'll take the bait. [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] A battery bank can be a band-aid fix for an improper charging system. Here's how: 1) Nobody draws 100% full power, 90% of the time. If you were to build a "burp machine" that was only good for full RMS power on test tones, and shut off the engine, never allowing the batteries to charge back up - this *would* be an exception. However, when you are done running a burp, you can leave the vehicle running to charge your battery bank back up. Depending on how far the bank is drained, and what capacity alternator you have, is how long the engine will need to be left running. 2) On the quiet/silent parts of the music, the system may be drawing as little as 10% of your reserve capacity. This means, on a 100A charging system, with an idle draw of 40amps, you still have 54 amps available to charge the battery (60 minus 10% = 54). 3) Alternators differ from generators in the fact that they take AC power and rectify it to DC. If the battery(s) is still in good condition then it will accept a charge. A "bad" battery will have a greatly reduced capacity and won't be able to hold a charge under these conditions, no matter how many amps you throw at it. Generally a battery must be sulfated, corroded or leaking in order for it to lose its capacity. 4) Most "burp machines" that are not used for daily driving, have 1 regular or high capacity alternator. The owner will charge up the battery bank with a typical 100-250 amp quick charger before each comp. If the comp rules allow for the engine to be running, this will give the competitor an edge having high operating voltage during their run. Otherwise you can still "cheat" by using a 16 volt system, with the engine off, if the rules allow. I always get a laugh out of the guys with the 4-5 high output alternators.... What's the point? You would have to be burping at full capacity and shutting your car off afterwards, without letting your batteries charge back up. I don't know too many people who run their cars just to bass, then turn them right back off again. A 100 amp alternator can charge several drained batteries just as well as a bank of alternators putting out 1000 amps. It will just take 10 times longer to charge. Its not like the alternator will burn itself up by putting out full capacity. That's what the rectifier and voltage regulator circuitry is for. It will just be running at full duty cycle until the battery bank is charged back up to capacity. [IMG]//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif[/IMG] The only time I have seen a damaged alternator was due to improper grounds, reversed polarity, or overheating (from the engine). (puts on flame proof suit and ducks for cover) [/QUOTE]

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