I found Nate Yarbrough's detailed instructions on his Explorist.Life site to be explanatory on a STUPID EASY LEVEL that even I could understand. Even if you want to use cheaper parts than he uses in his builds... Check out:
https://www.explorist.life/diy-camperva ... ar-project
However, I think you're most interested in his wiring diagrams: https://www.explorist.life/solarwiringdiagrams/
For awhile, he was selling an eBook, but it seems he's migrated all his info to the website and has discontinued the eBook. I'd recommend you purchase it if it was still available, but since it is NOT available anymore... you can snag a copy from my dropbox at
THIS LINK. However it was published in late 2018, so the website is probably a better and more up-to-date source.
Honestly, I followed this man's instructions
TO THE T, and I am
incredibly happy with my system. He recommends BattleBorn and Victron, but even if you go for cheaper parts and controllers... his wiring diagrams remain applicable. Also, he was happy to answer questions I had by email and was a really good responsive guy, even to me... a stranger on the internet. I cannot recommend him enough.