Replacing house batteries in our new motorhome with AGM

I've found that loads on my DC system while floating my 13.6v spec'd AGM require slightly higher voltages, the higher the dc loads the higher the float voltaeg needed to be ot prevent slightly discharging the AGM. The goosing of voltage to 14.7 reveals a slight discharge happens when floating at 13.6v with loads on the system.

Also colder battery means bump it up even higher.

Another reason I have contempt for fixed voltage converters or chargers, but ignorance was surely blissful.