dear 'So'
Mexi is our resident battery and alternator engineer
his opinions thoughts and experience are highly valued around here
many of us have learned a lot from him
and that includes me, and i consider myself a learned and experienced electronic tech in my own right
just becomes he suggests that "you could have some fun" by modifying your charging system with the field control POT
does not mean he was wrong about using heavy wire and making the house batteries primary and the chassis battery secondary for the RV/motorhome
as the house batteries see far more use and abuse than the chassis battery
BTW .. his feild mod will work and give you total manual control
not for the avg 'Joe' that wants set it and forget,
you would have to monitor it carefully or 'cook' your batteries
but it would charge faster
