Here's what I do. When the 5er comes home and is plugged into shore power or for that matter, when hooked up at a campground, the batteries stay on for 24 hours to get a good charge. After that I shut them off. Period. I have a volt meter attached to the battery bank so I'm looking at the charge of the batteries often. I have never had any problems doing this. I have stayed at campgrounds for at least a month, when we do stay at campgrounds, which isn't often. There is nothing in my 5er that doesn't work because of this. My slides go in and out and the jacks go up and down. With them shut off there is no parasitic drain on them to worry about and they don't get boiled dry, just in case there is something not working with the converter. That's the way I do it so shoot yourself. By the way I've been doing this on a number of TT and 5ers over 35 years of using them. Stay safe.