electrical

You still need to have a qualified person look at because your ask is still impossible. You can find basic wiring diagrams for Rvs all over the net with solar converters, batteries etc. But it all has to be compatible. Even RVs coming off the same assembly line can be wired a little differently. You have a 38-year-old Rv with some aftermarket parts that someone has already done some wiring in it for you. Not trying to be crass, I understand your issue, but armchair responses on here aren't going to help you much with your scenario. You need someone to look at your rig, understand how it's wired now, lay out the equipment etc etc. It's not overly complicated, just that your RV is pretty unique given the age and new equipment. Even production RV's wiring is often a mystery how they did it. Google wiring diagrams for RVs with Solar, your batteries, etc. Also, do you have a generator. Not sure you'll get much run time out of an AC on batteries.