Can't tell you about the total coach stuff because I have an "experienced" coach. When I installed the Magnum Energy setup, I found that the controller has 2 AGM settings. AGM1 has a higher float rating, I don't remember what without looking at the manual. The AMG2 setting is specifically for the Lifeline battery and is set for 13.1 volts.
With the battery monitor, I would think that the float would be regulated by battery temperature.
Currently in Mexico but when I return to CONUS, I will give ME a call and ask a few questions
2002 Country Coach Intrigue