Good info coming in on charging AGMs; must be of interest to those who have them with solar and get to high SOCs.
I suppose monitor inaccuracy doing that is from the CEF going crazy above 80% SOC same as with Wets.
LY has his AGM hidden away where he could not get at a Wet there to do hydrometer checks. So once you have the AGM, now you want to know how it works and what changes might be applicable to your charging routine from when you had Wets. Interesting topic!
Sounds like LY should get a second AGM for just the engine, and forget the T-1275 or whatever. He can run his rig on just the one hidden away house AGM. The new one would be something of a spare until it takes over someday to do both jobs when the first AGM wears out.