I’m beginning to think that OP is overdrawing the trolling motor batteries moving the pontoon boat. What size batteries are you using, OP? I was just thinking that I got about 6-8 years on my last pair of group 24 Lead Acid for my trolling motor and about the same on the group 24 AGM for cranking and electronics. I’m still running group 24 AGM on the trolling motor and a group 31 AGM on the crank/electronics and am studying to see how often I get to 50% on the group 31 to see if I need to split it up with a group 24 AGM for crank and Lithium for electronics/house.
If I'm not at work or taking kids to their activities, you might find me on "The Rez" fishing. If not there, I could be in the garage working on my boat.