Thanks for all the answers. Pretty sure my charger does cut down or off when battery is fully charged.
I realize the converter will keep the battery up if plugged into a/c.
Maybe didn't make my question clear. " Does it hurt to use 110v battery charger while the battery power to the trailer is on and the frig is running on propane"
What I was trying to say is tt would be on battery power only, no a/c, and frig is on propane. Then is ok to use a 110v charger?
Reason for the question is the tt will be 100' or so from a/c power source so I can run a cord to the charger but not hook up the normal a/c to the tt.
thanks