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Message: <blockquote data-quote="DBDRAGGUY" data-source="post: 4987125" data-attributes="member: 583047">Get the batteries. Your system will be pulling its power from the batteries not the alternator.Think of the alternator as a compressor motor and the batteries as the air tank.The HO alt will allow you to charge your batteries at a higher rate. Putting a 250 amp alt on 1 battery is like putting a 7hp compressor motor on a 2 gallon tank. With a 3 battery system you factory alt will do for now, after the batts are installed then go for the alternator.As far as running a 16 volt system you have 2 choices. Invest in the batteries and a dual regulated HO alternator or keep the factory alternator and add a 2nd 16 volt stand alone alternator.  Running a 16 volt daily system with no on board charging system is half assed and will just be a waste of good batteries.</blockquote>

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