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<blockquote data-quote="Old_Slapper" data-source="post: 8880585" data-attributes="member: 690458">They probably recommended the smaller alternator because that&#039;s the biggest they have.&nbsp; However, the chances of you using 100% of your power is quite unlikely to ever happen.&nbsp; However, if you&#039;re drawing 500 amps, then you need something that will provide that.&nbsp; If you don&#039;t, then your amps will draw all the power and prevent your other electronics from getting what they need.&nbsp; That means your lights and onboard computers will get less than 12v.&nbsp; Possible down in the single digits.&nbsp; I will never forget the guy who insisted on not upgrading his alternator, in a Pontiac Grand Am, after I install a 1500 watt system.&nbsp; He was cranking the sound way up when all of a sudden his car died.&nbsp; The system was too much for his car and when he cranked his system way up, it sucked all the juice from the cars electrical system.</blockquote>

[QUOTE="Old_Slapper, post: 8880585, member: 690458"] They probably recommended the smaller alternator because that's the biggest they have. However, the chances of you using 100% of your power is quite unlikely to ever happen. However, if you're drawing 500 amps, then you need something that will provide that. If you don't, then your amps will draw all the power and prevent your other electronics from getting what they need. That means your lights and onboard computers will get less than 12v. Possible down in the single digits. I will never forget the guy who insisted on not upgrading his alternator, in a Pontiac Grand Am, after I install a 1500 watt system. He was cranking the sound way up when all of a sudden his car died. The system was too much for his car and when he cranked his system way up, it sucked all the juice from the cars electrical system. [/QUOTE]

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