I had a single 100w panel on my 06 PT and for the first time since I've owned the coach, due to COVID, we did not winter in Indio at our park. So the coach is in outside storage here in Bend and the batteries keep running down. I added another panel and upgraded the controller and battery monitor. I went with Victron 702 to monitor the 4 house batteries and the 2 starters and the Victron Solar controller as well. The monitor was installed in the master stateroom pretty much directly over the batteries so the run was quite simple. The Magnum system up front is unaffected. The second panel and new controller pretty much offsets the parasitic drain, at least until the last big snow which buried the roof and panels. That stuff is not all that costly either.
