Welcome Aboard!! 🥂👍
My experience...I learned that the TV alternator is the least effective way to charge the AS batteries.
I have never used 6v, Two Interstates 3yrs> 2 Lifeline AGM's 11yrs> 2 Lithiums 1yr.
Even the 200a in our Suburban is marginal at best.
FWIW...we used a 1000w Yamaha genset to keep everything charged in our first AS...23' '63' Safari.
ďItís not the system thats the problem, think Circus, itís not the car, itís that the car is full of Clowns.Ē