Between trips -- Semi Storage...Shore power connected?

I stay plugged in during my non-use time. My convertor seems to keep the batteries at just the right level.
I prep my fridge 24 hours prior to leaving, along with filling the water tank.

I use bottled water while it is sitting and I use potable antifreeze to flush the toilet, as I use it for a quiet room to do some work when the grandkids have been over for to long. Been doing this for many years with different campers types.