Today I think I narrowed it down to two issues. The previous owner recently replaced 1 battery of 5 and put in a sealed battery instead of a maintenance battery. My dock neighbors all seem to agree that the older chargers prefer all the same type of battery. I think maybe the relatively new battery has stressed the battery charger and caused it to kick on more often than it is used to and caused it to burn up. Earlier I mentioned that it still had the problem even though I had turned the switch off but I think the battery charger was still somewhat powered for a few minutes. I monitored it today with the battery charger off and didn't have the power deficit issue at all until I turned the charger back on. New plan is switch to costco AGMs and look into a new charger. While I appreciate the safety concerns I personally have never had luck just purchasing a random book and expecting to have a solution to my unique problems. I would appreciate someone linking me to an actual book. Thanks for the help