For the past 8 seasons we've had to store our camper off-site. Having no power option at the storage site, I always pulled the battery from the popup and brought it home, keeping it indoors/protecting it from freezing over the winter (but not on a battery tender/charger). We just finished widening our driveway and adding a fenced-in parking area for the pup, and I brought it back from the storage lot for the last time yesterday. So I now have the option to keep the camper plugged in 100% of the time if I want. So my question is, is it practical/better to just leave the battery mounted all winter with the converter trickle-charging it? We have a nice Progressive Dynamics converter with a true battery charger. This is Minnesota so it does get quite cold. Another concern I just thought of is that if the converter is powered, it may provide some warmth that rodents seek out and now have a reason to chew their way into the camper, where they wouldn't otherwise.