.. Now, the disconnect does not disconnect everything. The turn signals, DDEC, passenger clock, and some other items get juice no matter what.
Do you have anything maintaining their charge in between uses? Either a maintainer or manually checking and charging them monthly?
Brian look for a separate switch for your ddec and other 12 volt needs.I have one on the 89 prevo in the top of the back bay close to the vanner..I use a set up like in a bass boat to maintain batteries has 4 separate 10 amp on demand chargers that charge batteries as needed individually.. my batteries last about 6 yrs without a problem.using 4 ea series 31 batteries 54$ each from local supplier:definitely not the high end batteries. add a total system batt disconnect switch to isolate batteries altogether..Bob