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Posts: 106
| my brother in law has a 12 volt trolling motor. he has two batteries hooked in parallel to run it. he has a on board charger hooked to only one of the batteries. my question is if he hooks it to only one battery is both batteries getting charged or is only the one he has it hooked to getting charged? |
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| Yes, both batteries will be charged, but it will take twice as long or longer than charging just one. |
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Posts: 546
Location: MN | You can hook a set of leads to each battery. There are the same number of amps coming from each set of leads, into the larger capacity of (2) 12v batteries. Once fully charged, a good charger will then go into a maintenance mode to protect from overcharging. |
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Posts: 983
| I unlink mine an charge them seperately... |
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Posts: 325
Location: Otsego, MN | Chemi - 2/23/2017 3:57 PM
Yes, both batteries will be charged, but it will take twice as long or longer than charging just one.
Is it hard on either battery doing this? I was considering doing it with my starting motor and my separate motor for my kicker/electronics. Right now they are separate and only have 1 onboard charger so the starting motor doesn't get anything other than the alternator. I considered combining in parallel but am cautious. |
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Posts: 983
| Y not just charge them separate motor battery should get too low....
also if he has a 12v trolling motor why would you have 2 batteries in parrellel that would be giving 24v I dont get it |
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Posts: 325
Location: Otsego, MN | 25homes - 3/2/2017 10:19 AM
Y not just charge them separate motor battery should get too low....
also if he has a 12v trolling motor why would you have 2 batteries in parrellel that would be giving 24v I dont get it
To charge separate an additional onboard charger would be needed.
Also, 2 batteries wired in parallel is still 12 V. In fact no matter how many batteries you wire in parallel they will always be 12 V.
Putting them in series makes them add the voltage. Parallel just increases the amp hour or longevity he can use the trolling motor. |
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Posts: 983
| Muskers - 3/2/2017 2:02 PM
25homes - 3/2/2017 10:19 AM
Y not just charge them separate motor battery should get too low....
also if he has a 12v trolling motor why would you have 2 batteries in parrellel that would be giving 24v I dont get it
To charge separate an additional onboard charger would be needed.
Also, 2 batteries wired in parallel is still 12 V. In fact no matter how many batteries you wire in parallel they will always be 12 V.
Putting them in series makes them add the voltage. Parallel just increases the amp hour or longevity he can use the trolling motor.
Ok so parrellel and series I got mixed up makes since...He could just use a seperate charger to charge the second couldnt he?? |
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Posts: 229
| When batteries are hooked in parallel the + on one goes to the + on the other. And the - on one goes to the - on the other. So if he hooks up a battery charger to one battery, the other battery will be connected to it by default. So in theory, both batteries should be getting charged by the charger. That being said I have never ran a trolling motor with parallel batteries. I have always used a series 24V system- two batteries connected on one end only + to -. The non connected + and - are your 24V out(12V +12V = 24V). I have heard that sometimes people run the parallel system but the series system to create a higher voltage is far, far more common. I guess the last thing I have to say on this is I am not sure how well charging parallel batteries works. |
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Posts: 670
Location: mercer wi | I just Google this topic. Tons of good info online and on you tube |
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Posts: 303
Location: Not where I want to be! | Muskers, you do not want to connect in parallel a starting battery and a deep cycle battery. The purpose and construction of the two batteries is not conducive to good performance. Starting batteries are built for a surge of power and deep cycles are made for slow power draws.
The advantage of hooking up two 12v batteries in parallel is that you get twice the amount of reserve capacity of amps and still have 12 volt system. You could hook up as many batteries as you want in parrallel and still have 12volts just more amps available.
The only reason to hook up in series is for a 24 or 36 volt trolling motor. |
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