The big voltage rip off in my SUV
Since day one, I've always had marginal charging ability from my VW Touareg to charge up the travel trailer battery on trips. Almost without fail, driving and trailering all day, the silly 1/3 or 2/3 ...
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If you would run a 8 gauge charge wire from your Alternator charge lug to the 7 way on your tow plug(you will have to adapt from 8 to 10 or 12 gauge at the plug to get it inside the plug. Then run a 8 gauge from your Tow trailer side to the RV battery. I will bet your charge problem will go away. Wire SIZE is critical when charging 12 volt systems. The factory tow vehicle wiring is never large enough to adequately do a good job. Also, doublecheck the ground wire also. The larger (8 gauge) ground wire is also needed. It takes BOTH large cables on a 12 volt system to flow the current needed. Hopefully you are not using the ball as the ground. Doug
14.4 is more than enough to charge your battery.
14.4 is more than enough to charge your battery.
