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Two Batts for Trolling Motor and Engine

Minnboy

New member
Hi:
I'd like to share two batteries for my 25HP engine and a 24v trolling motor. And I'd like to be able to charge one of those batteries when the engine is running. Is this even possible? Attached is a diagram of how I think it would work. Basically, Batt 1 is a direct 12v connection to engine whereas Batt 1&2 are in series to run the trolling motor. Would this work and is there a problem if I wire it up this way? Thanks!!!
 

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  • Batts for Troll and Engine.jpg
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When the 2 batteries are connected, the 24v will try to discharge thru the 12v.
12v + 24v in series makes 36v. Your trolling motor will run fast for a short time.
There are 12v to 24v chargers.
 
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