You would get a better response if you started a new thread. Old threads tend to get lost and are hard to revive.
I recommend you buy a better brand of travel trailer. Dutchmen, Kodiak, Keystone, and Voltage tend to have more problems than most others. Their main benefit seems to be low purchase price.
You can probably find the same floor plan in multiple other brands. They may cost a little more to buy but tend to cost less in the long run.
You should post the solar installation question separately. You will get better results.
Search for "Solar" in the search box at the top of this page. You will get plenty of reading material.
I wish you good luck and happy trails ahead!