Ok, going the ‘AGM route’ now…charging ?

[Danjuan]

Hi, I’m a 2020 Navion with 1.5 year old NAPA Lead Acid house batteries that have gone basically flat several times while boondocking around trees because of the excessive load, from fridge with no propane mode, even ‘night mode’.
I know this issue has been kicked around a lot, especially where Lithium comes in… will the Sprinter engine alternator and regulator know the proper charging algorithm for charging these two New Renogy 100Ah batteries? I/we know the settings on Zamp solar charger and Xantrex inverter/charger/controller are simply changed to AGM, but driving down the road, will Mr. Sprinter want to overcharge and too quickly ?
Also, I’ve been told these AGMs won’t let themselves go low enough to where they damage themselves, tru ? I know the fridge has a 10 volt shutoff mode but by that time, the damage is done.

All Ears, Dan in the rainy PNW.