"Newer" Ford trucks don't charge house batt's?

I was told this buy someone at an RV business......sounds like BS.....but I know shinto about vehicles........
So I put this claim to you guys. BS or no BS?

Also, while we're at it, same guy:
The BMS in lith batt's is a big drain on the batt's.....
BS or no BS?

Edit: Mod's- If this is best put elsewhere, please go ahead and move. :)