Recently bought our first travel trailer, and it has been quite the education, including understanding the dual electrical system. One thing I am thinking about doing is adding a 2d battery. I have ...
Well, you all having given a lot to consider, most of which I never even began to consider when I wrote the question. I thank everyone for their responses. I think for now I will add a 12v in parallel. The trailer has an angle iron trough that would easily take another one.