Hypertech Trollbridge 12V - 36V Battery Combiner (TB36) allows charging the 36V trolling motor battery bank ( 3- 12V batteries wired in series) from the 12V main engine alternator, single output battery charger or trailer hook-up. It works by connecting three 12V batteries in series when running the trolling motor and in parallel for charging. It has a built in Combiner function so the trolling batteries will never steal power from your starting battery.
The Trollbridge TB36 is suitable for installations with alternators up to 100A and a 36V trolling motor up to 85A.(Special Order, allow 2-3 wks to ship).
Hypertech Trollbridge TB36 Diagram: