TrailManor Owner's Forum - View Single Post - Will a Battery Isolator relay also protect the Tow vehicle alternator?

Shane826 · 01-22-2024, 08:03 PM

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.

01-22-2024, 08:03 PM	#2
Shane826 TrailManor Master Join Date: Aug 2015 Location: Rochester, NY Posts: 1,840	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. __________________ 2007/21 TM 3326 (Pride of the Fleet) 2000 2720SL (Rebuild Project) 2002 2619 (Parts TM) SMARTER THAN GOOGLE!