you guys know you can run 2 and even 3 batteries in parallel on a 12v trolling motor right? You're not getting any added runtime by moving to 24 and 36v compared to having 2 and 3 batteries in parallel at 12v. I run a pair of group 27 AGM's on my boat with my old 12v 54lb motor guide trolling motor and can switch to use both, or a single if need be.