Maxxfan delux latent power draw

Every situation is different. I have a Pioneer stereo in my Northstar, and if I turn off power to it, when I turn the power back on, it goes into "Demo Mode", and has lost all it's settings. Since I reprogram it so rarely, it takes me 20-30 minutes to find the manual, figure out which of the numerous settings I need to change, and get it all reprogrammed. I really like the Pioneer when it's programmed correctly. I would consider buying a different stereo, but it's pretty much impossible to find out which models don't lose their memory if they lose power.

So I leave the batteries connected during winter storage, and the stereo plus another mysterious phantom draw combined draw about .2 amps. I keep an eye on the cumulative draw with my Victron BMV 712, and once a month or so when they get low I plug the camper in to charge them back up.