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<blockquote data-quote="audiolife" data-source="post: 6849302" data-attributes="member: 541383">If you have lets say a max draw of 160 amps for your audio system it is not always going to draw 160 amps to music. Sometimes it could only be drawing 35 amps. During the time the draw of the audio system is under the output of the alternator it will recharge the batteries. You can over load an alt by letting your battery or batteries get drained too far as the low resting battery will draw more power than a charged battery will by far.If you have an audio system in your car I always suggest a battery charger no matter if you have a high output alt or not. Why? Because alts bulk charge batteries they don&#039;t &quot;top them off&quot;. Charge back up a battery to 80 to 90% and dont top it off sooner or later that 80-90% becames the batteries new 100% due to sulfation. Regular flooded cells or agm and the two different types of batteries need different chargers or modes to charge them correctly.AGM type batteries recharge faster than the flooded wet cell type and when they are close to being fully charged draw less than their wet flooded cell counter parts. Getting a larger/higher output alt is a great thing to do but in larger systems doing both upgrades is suggested. Think of the alternator as a motor on an air compressor and the battery as the compressor tank. You can have a totally bad assed compressor motor but if the tank is too small or has holes you are limited anyway.</blockquote>

[QUOTE="audiolife, post: 6849302, member: 541383"] If you have lets say a max draw of 160 amps for your audio system it is not always going to draw 160 amps to music. Sometimes it could only be drawing 35 amps. During the time the draw of the audio system is under the output of the alternator it will recharge the batteries. You can over load an alt by letting your battery or batteries get drained too far as the low resting battery will draw more power than a charged battery will by far. If you have an audio system in your car I always suggest a battery charger no matter if you have a high output alt or not. Why? Because alts bulk charge batteries they don't "top them off". Charge back up a battery to 80 to 90% and dont top it off sooner or later that 80-90% becames the batteries new 100% due to sulfation. Regular flooded cells or agm and the two different types of batteries need different chargers or modes to charge them correctly. AGM type batteries recharge faster than the flooded wet cell type and when they are close to being fully charged draw less than their wet flooded cell counter parts. Getting a larger/higher output alt is a great thing to do but in larger systems doing both upgrades is suggested. Think of the alternator as a motor on an air compressor and the battery as the compressor tank. You can have a totally bad assed compressor motor but if the tank is too small or has holes you are limited anyway. [/QUOTE]

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