Thread: Battery charger issue

Originally Posted by Snubby

You got a whole lot going on that setup. Why not just run two 12v in parallel as opposed two in a series of two 6 volts to create 12v? Biggest problem I see is your trying to charge two separate batteries with a single bank charger. 45 amps is a bit strong to recharge deep cycle batteries, your breaker is only a 50 amp, IMO. A slow charge of 15 amps or less is best and then a maintainer charge for DC batteries. Look for a 6v/12v two bank charger and it may just solve your issues

Stubby
Thanks for your help.
The reason im trying this setup is the combined batteries yield 225 AH @ 20 hrs. Or 185AH @ 5 HRS

Sent from my SM-G965U using Crappie.com Fishing mobile app

14.83 , 14.79

Guys, i pull off the breaker and did my best to solder it up.
Interestingly by charger is putting out a lot more power now.
14.83 v at the charger terminals
Down to 14.79 at the battery.

Is this acceptable voltage drop?
Im looking for evidence that my solder job was ok.
No extra heat coming from the solder joint.

Thanks

Sent from my SM-G965U using Crappie.com Fishing mobile app

That is very minute drop for that run. If it’s not getting warm you have a good connection. It should drop from that pretty quick. Just check about every thirty minutes and you should see it dropping as batteries start to charge. One other thing. As they are charging use the feel test to see if battery cases start to get very warm. That is not a good thing and could tell you you are charging to fast. Also pull your caps and look for bubbling. I don’t think your going to have a problem now though.

Originally Posted by Cray

That is very minute drop for that run. If it’s not getting warm you have a good connection. It should drop from that pretty quick. Just check about every thirty minutes and you should see it dropping as batteries start to charge. One other thing. As they are charging use the feel test to see if battery cases start to get very warm. That is not a good thing and could tell you you are charging to fast. Also pull your caps and look for bubbling. I don’t think your going to have a problem now though.

Thanks again,
I stayed with the charger for an hour, putting up tools etc.
Voltage did drop to 13.8 , i did hear some bubbling during the initial the bulk stage.
I will check battery exterior temperatures too.


Sent from my SM-G965U using Crappie.com Fishing mobile app

Brett, I have question. What kind of run time are you getting out of this setup if you pulling cranks or longlining?

Originally Posted by brettw

Stubby
Thanks for your help.
The reason im trying this setup is the combined batteries yield 225 AH @ 20 hrs. Or 185AH @ 5 HRS

Sent from my SM-G965U using Crappie.com Fishing mobile app

Fair enough, and no problem!

I changed from two 12 volt parallel wired batteries to 2 six volt series wired golf cart batteries in my motorhome. My run time almost doubled.
This was done on recommendation of an Interstate technical rep at an RV rally. The price was similar for 12 vs 6 volt. The specs on the 6 volt show a considerably higher reserve capacity. The 12 volt on board charger had 2 leads. The positive went on the positive of one battery and the negative of 2nd battery.it's basically just a really big 12 volt battery when wired in series.

Originally Posted by Cray

Brett, I have question. What kind of run time are you getting out of this setup if you pulling cranks or longlining?

Good question.
Fact is ive never gotten to do extensive pulling since installation.
I just wanted to try something different
I was killing my battery last spring.
We only have black crappie where i fish so it easy on the trolling motor in the summer.
I suspect the AH numbers are accurate.

Sent from my SM-G965U using Crappie.com Fishing mobile app