Craftsman -- You need to go into such a consideration with eyes wide open. There are practical limits to what solar will do, and then at a rather high price. Maintaining charge seems exorbitant to do what a
battery minder can do for $30-40. A quiet Honda generator at $1000 is cheap compared to solar. There are small little window solar collectors mentioned in the forums if you want a no-fuss charge maintainer while in outside storage. Solar cannot keep up to allow nightly TV watching and nobody carries enough batteries to run a microwave. One always needs a hookup to run A/C, so that's not really in the argument. But an occasional 110-volt hookup will always solve your battery charging issues.
Some cost-benefit analyses have been offered on the forums -- RoadKingMoe comes to mind. Glass mat batteries as noted have benefits but can be part of your normal replacement plans. It is costly to throw out good lead-acid batteries if they aren't worn out. You'll have to sort thru a lot of threads if you use the search function, but this decision is so costly that the research is well worth it.