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New User
Posts: 3
| I have a 12v trolling motor and two trolling batteries, also a two bank charger. Need one bank for my starter battery, how can I hook up my two trolling batteries to my 12v motor and my one bank left on my charger. Thanks for the help! |
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Member
Posts: 744
| I don't believe you can do that. One bank = one battery. You need a 3 bank charger to do all 3 batteries at once. I would suggest hooking the charger you have up to the trolling motor batts (I assume you have them hooked together in parallel), and then buy a standard auto 12V charger for the starting battery.
Dave S
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Member
Posts: 3899
| Your TM batteries are connected in Parallel, so you just take one bank to the TM batteries, and the other to the starting battery. Plus to Plus, and Neg to Neg. It will take twice as long to charge, but this will get you there. Good idea to double up on the 12V TM batteries. Get more than twice the run time that way.
Edited by Shep 4/18/2008 1:04 PM
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Member
Posts: 96
Location: DeForest, WI | Be careful with that.
I have a setup with parallel batteries.
You need to have two connections to the charger or you will fry the battery the charger is connected to. You may however put fuses inline on your connection to help. But the recommended hook up from Pro Mariner is to have a charge lead to every battery. |
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Member
Posts: 3899
| The batteries are both connected to the charger. Connected in parallel, it's not like you have the charger on one battery and not the other.
Had my old Tuffy connected to an on board this way for 8 years. Never had a problem. But I always had the charger plugged in year round. If you don't leave the charger plugged in, yes, the batteries will try to equalize, and one main drain the other til it's no good anymore. That maybe what happened to you. That's why the diesel pickups with two batterys have isolators in them. |
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