after 3 batteries, why haven't you installed a battery disconnect switch, so the battery doesn't get depleted by the parasitic power drains?
i installed one in my hybrid TT and after 4 months of storage, the batteries were still nearly fully charged.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC