The problem, in theory, is the ultra-low resistance of the lithium battery. The 12V+ wire on the tow vehicle is so small that it creates enough resistance that it’s not really an issue. If you upgrade the 12V+ circuit to a heavier wire on the tow vehicle it drops that resistance down and that can cause alternator burnout. The ideal solution then would be a DC to DC charge controller.
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2007/21 TM 3326 (Pride of the Fleet)
2000 2720SL (Rebuild Project)
2002 2619 (Parts TM)
SMARTER THAN GOOGLE!
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