...when it comes to solar on RVs, it seems there are two kinds of applications: 1- is the minimum required to keep up batteries, like your situation; and 2- a major investment to become self-sufficient off the grid for dry camping. Folks in the first category often get discourage by the complexity and expense and look for a shore power solution. Folks in the latter category get the solar bug and tend to go all out with upgraded panels, controllers, batteries, and inverters.
If you don't want to "invest" in new panels, new controller and new wiring, and the labor to install--I would: 1-get an assessment of your current equipment to see if something can be easily/cheaply fixed; or 2-look at a portable suitcase set-up for storage. Either way, something in the range of 100-200watts should do it--the 10watt panel is pretty much useless. In the meantime, disconnecting the battery cables while in storage will isolate your bats from any phantom draws.
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Old Scout
2015 IH45 Foretravel
2003 Alpine 40' MDTS [Sold]
New Braunfels, Texas
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