Originally Posted by Bama Rambler
There are arguments for both. If you have a good three stage converter/charger it won't hurt the batteries to leave it plugged in all the time. Mine stays plugged in all the time and i only have to add distilled water about once or twice a year. You need to be able to check everything regularly if you leave it plugged in.
Ditto for me: Good advice from Bama. Mine too stays plugged in all the time as we always keep the fridge going in our rig but then again it's parked inside our garage and the RV fridge is my "beer fridge" (expensive beer fridge
) We also keep the fireplace running to keep a little heat in there during the winter and keep the moisture away.
As Bama said, keep and eye on the water levels in the batteries and only replace with distilled water when they need more.