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Battery Setup Question

Old 09-09-2011, 06:07 AM
  #1  
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Default Battery Setup Question

Hey all. First time poster here. I've got an '86 Bayliner Trophy 2159 with the hardtop and OMC 5.0 I/O. In the relatively near future, I'm looking to add a 36v minn kota trolling motor - which requires 3 batteries. Currently I have a starting battery and a single house battery which runs the baitwell pumps, fridge, lights, electronics, etc. There is an isolator between the two batteries.

I was reading through past threads and read something along the lines of the 36v trolling motors only run off of 24v unless they need an extra boost, in which case they tap in to the 3rd battery. I may have misread so can anyone provide clarification on this?

Does anyone have recommendations for battery setups? I'd prefer not to have 5 batteries. If the 3rd trolling motor battery were to be used as the house bank also, are there problems that can arise as it will have a different discharge rate than the other two?

Thanks in advance for your responses.
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Old 09-10-2011, 02:37 AM
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Originally Posted by Fishin Jake View Post
Hey all. First time poster here. I've got an '86 Bayliner Trophy 2159 with the hardtop and OMC 5.0 I/O. In the relatively near future, I'm looking to add a 36v minn kota trolling motor - which requires 3 batteries. Currently I have a starting battery and a single house battery which runs the baitwell pumps, fridge, lights, electronics, etc. There is an isolator between the two batteries.

I was reading through past threads and read something along the lines of the 36v trolling motors only run off of 24v unless they need an extra boost, in which case they tap in to the 3rd battery. I may have misread so can anyone provide clarification on this?

Does anyone have recommendations for battery setups? I'd prefer not to have 5 batteries. If the 3rd trolling motor battery were to be used as the house bank also, are there problems that can arise as it will have a different discharge rate than the other two?

Thanks in advance for your responses.

Jake take a look at my post above "BEP marine wiring question". All the newer boats are using the BEP marine vsr system to manage your situation and I'm installing one now after adding a 3rd battery to my twin engine setup. It's $225 from foreandaftmarine.com for the two engine setup and it's the shizzle.
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Old 09-13-2011, 05:18 AM
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Thanks for the response Capn. I currently have a VSR between my cranking battery and house bank battery.

I think my buddy has convinced me to go with a 24v trolling motor which means I'd only need 2 additional batteries. 4 batteries is a little more palatable than 5. And I can fit 4, but if I went with 5, I'm not sure where I'd stick the 5th battery.
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