First, northern OH has limited solar exposure, especially in winter. the Schumacher SP-400 Solar Battery Maintainer is only 4.8 watts, that might handle one battery but you're planning to maintain 3 or more? (chassis batteries)
Either invest in more solar panels or just physically disconnect all fully charged batteries during storage. I imagine phantom drains on your batteries plus natural discharge will exceed that solar set up.
North Olmsted is well within the lake effect region of Lake Erie, a solar panel doesn't work well under snow cover.
Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI