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  #11  
Old 03-16-2017, 12:40 PM
REW REW is offline
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B-man,
You could also run the motor on 24 volts if you wish.
It will cut down on your longevity, and your top speed, but otherwise, it will work just fine.

By the way, 3 group 31 batteries at 60 lbs each are only 180 lbs.

Since you have the 60 hp motor, you could just leave out all of the trolling motor batteries and the trolling motor and save your self 150 lbs if you want minimum weight.

You could put a 5 hp kicker on the transom and only have about 110 lb weight added to the boat.

Be safe
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  #12  
Old 03-16-2017, 12:41 PM
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Quote:
Originally Posted by cyber16 View Post
wrong, the amp hours does not increase when they are in a series
Yeah you're right.

My capacity triples with three batteries, and draws less amperage at a higher voltage for a similar end game, like running three batteries parallel at 12 volts in and 12 out.
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  #13  
Old 03-16-2017, 12:43 PM
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You will benefit from the power of a higher voltage motor with lower current draw. Therefore amp hours tend to stretch further in comparison to 12v or 24v
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  #14  
Old 03-16-2017, 12:45 PM
REW REW is offline
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The other thing that you could do, but I don't recommend doing it is to use your 12 volt starting battery as the 3rd battery for your 36 volt trolling motor.

If you do use the starting battery for part of your trolling motor battery - you need to keep a close eye on the voltage so that you don't run the battery down so far as to not to be able to start your engine.

I currently run all group 31 batteries in my boat. That includes one group 31 for a starting battery. It works very well.

If you did decide to use the starting battery as part of your trolling motor battery, you would want to add a full time voltmeter to your boat, so you would not be caught by surprise by having the starting battery go dead on you.


Be safe

Last edited by REW; 03-16-2017 at 12:58 PM.
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  #15  
Old 03-16-2017, 12:59 PM
REW REW is offline
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B-man,
If you do decide to put 3 trolling motor batteries in your boat, you can always buy an additional lower pitch prop to get your boat on plane with the extra weight in your boat.

Pitch down, and you will be able to carry the weight.

Be safe
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  #16  
Old 03-16-2017, 01:14 PM
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Quote:
Originally Posted by REW View Post
Since you have the 60 hp motor, you could just leave out all of the trolling motor batteries and the trolling motor and save your self 150 lbs if you want minimum weight.
My favorite REW advice yet.
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  #17  
Old 03-16-2017, 01:25 PM
Ichthyguy Ichthyguy is offline
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I would sell it and get a 24 volt, or 12 with a large battery? Do you have room to store 3 batteries?
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  #18  
Old 03-16-2017, 01:51 PM
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Quote:
Originally Posted by Ichthyguy View Post
I would sell it and get a 24 volt, or 12 with a large battery? Do you have room to store 3 batteries?
I have the room, just not the horsepower (unless they are light/small), but a 24 volt is definitely preferable. I could just run a pair of group 24's, instead of three smaller batteries. Less wiring, less banks.

What I'll probably do is just put a want-to-trade thread in the swap board here.

I'm sure someone with a 24 volt is looking to go bigger? I would have killed to have a 36 volt on my last boat, but just don't need it on this one.
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Last edited by B-man; 03-16-2017 at 01:55 PM.
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  #19  
Old 03-16-2017, 02:24 PM
REW REW is offline
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B-man,
If you have a pair of 12 volt batteries to connect to your 36 volt trolling motor, go ahead and hook up the batteries and take the boat out on open water if and or when it is available.

I suspect that you will be happy with the performance of the 36 volt motor on your boat running with 24 volts.

You certainly won't hurt the motor.

Most of the controllers on trolling motors are 12 volt controllers. They just have the ability to control the higher voltage that runs - generally - only to the motor itself.

Here is the motor control board for your motor. Note, that it is the same control board - whether the motor is powered by 24 volts or 36 volts.

https://northlandmarine.com/collecti...-board-2774014

The motor will run just fine on 12 volts, it will just run 1/3rd slower than if you have it powered with 36 volts.

Take care
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  #20  
Old 03-16-2017, 02:53 PM
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REW, yes they share a main control board, but they do not share the same steering motor/gear box.
the 12v uses a 12v, 24v a 24v and the 36 indeed does use a 36v there is no step-down taking place in that circuit, Best case is the steering will respond slower, the alternative is at some point the main board suffers a failure do to the low voltage higher resistance on the end of that circuit.

Last edited by cyber16; 03-16-2017 at 02:56 PM.
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