Kansas,
There is a two questions that nobody has asked.
How well protected is this storage area?
Is there any continuing load on the house bank?
If it is not well protected, bring the batteries and the propane tank home. It is a PITA, but they will not be covered by the deductible.
If it is, get a solar maintainer. I have put these on owners boats for years.
If there is a continuing load like a CO or gas monitor, the solar may still cover it, but depending where it is, it also might not. A good battery will self-discharge about 1% a month. If you can live with that, leave it alone.
Matt
