I guess my question on the unplug for a short overnight is WHY?
Is the TV batteries that bad, is the 5er's batteries that bad? I would not bother for that short of time.
I was awoken on our first night of Hosting in June, with the Propane alarm going off. during setup we had a lot of lights on (12V) it was a bit cool that day and the furnace ran a bit. We didn't have the leg of power that the converter was on, so 5er battery was low. I plug the cable in to solve the problem at 2:00 am, no issues starting the TV in the morning.
You would need some huge draws to kill the battery in an overnight, we ran the furnace off batteries, during an orientation session charging during the day off generator, batteries hardly dropped overnight.