AnEv, I have the same solar suitcase as you.
When it comes to electricity I am.......well I thought AC/DC was a band?
I tried to program my controller with the english/chinese manual but gave up. After confirming the default was for my AGM batteries I just plugged it in and IT WORKED. On a eight day late fall hunting trip it kept my twin AGMs fully charged. Hope my wiring is OK....I am afraid to look.
Because my camper was wired with a SAE solar plug I had to splice in a SAE fitting to replace the jumper camper cable clamps. It appeared they used aluminum? wiring so that was interesting trying to solder the two together. Anyway, for now it all works. Thanks for your post and a heads up.