I just had the house batteries replaced with AGM's. I checked the built in "battery control" and voltage was reading 8.85. This was one week after install. I started the generator to exercise it, the ...
I don't have AGMs but the lead acid Trojans on board when first installed required the generator running several hours on the road to get to just float charging. Just plugged in wouldn't do it. Our coach is a 2005 though.