• GUESTS

    If You  want access  to member only forums on FM, You will need to Sign-in or  Sign-Up now .

    This box will disappear once you are signed in as a member.

  • WE CREATE LONG TERM, MEANINGFUL RELATIONSHIPS IN HERE ... PLEASE JOIN US.

    You know what we all love...

    RECEIVE THE GIFTS MEMBERS SHARE WITH YOU HERE...THEN...CREATE SOMETHING TO ENCHANT OTHERS THAT YOU WANT TO SHARE
    When you enchant people, you fill them with delight and yourself in return. Have Fun!!!

  • 0
Sign in to follow this  
Guest

Wiring 12V Parallel

Question

Guest

Hey All-
Great board you have going here!! Maybe someone out there can offer some advice. I'm wiring up a 12V 55# MinnKota this weekend on our boat. I purchased two new Trojan Batts, and plan on running them in parallel to remain at 12V but add some run time. My question is about the on-board charger. We're running a 2 bank, 10 amp model from BPS. What is the most logical way to hook it up to my setup?? We're currently running one bank to the TM batt and the other to the starting batt. Can I hook up both banks to the TM batts in parallel without disconnecting the jumpers between them?? I assume that by hooking one bank up to a TM batt, it will "see" the parallel batts as one big 12V, but may take a long time to recharge both at 5amps??

Opinions/suggestions please!!

Thanks

chico

Share this post


Link to post
Share on other sites

6 answers to this question

Recommended Posts

  • 0
Guest

You will need to disconnect the jumper between the batteries. You could leave it on when you charge but that is only if your batteries discharge at the same rate, if they don't then on will be overcharged prior to the second coming to full charge. You might want to put a QD between the batteries, use the charger on the two trollers. And buy a 11/2amp for the starting batt.

Rob

Share this post


Link to post
Share on other sites
  • 0
JIM PAYNE

Like Rob said with ac chargers they will not charge the batteries correctly more then one battery at a time. you should wire both banks to trolling motor. do you really need to charge running battery?

------------------
JIM PAYNE

Share this post


Link to post
Share on other sites
  • 0
Grabs

Batteries can be viewed as buckets of water. If you have two buckets of water tied together, the may discharge at different rates. But you can charge them in parallel, because the lower battery or bucket will fill until matches the level of the other. After they have leveled off they charge at the same rate until completed.

Share this post


Link to post
Share on other sites
  • 0
wastewaterguru

I currently use 2 12V batteries for my trolling motor setup and I use a single 2amp auto charger connected to one of the batteries. It takes about 24 to 30 hours to get to full charge. I would think that a 5 amp should drop this time substantially and how often are your batteries going to be fully discharged?

Do you really need to charge them faster than 15 to 20 hours??

Grabs is right about the water thing......both batteries will discharge and charge at the same rate. Because they are connected, if one discharges a little faster, the other will put energy back into it until they are at equal charge. They will always, by definition, have the same measured amp draw when connected in parallel.

Share this post


Link to post
Share on other sites
  • 0
Guest

Ok guys-
I'm going to try running one bank thru the TM batts. The charger is supposed to have full power transfer- meaning it will put the amps to the batt that is less charged. If the engine batt is full, it will maintain it, but turn the rest of the power to the less-charged one: more than likely the TM's. Hopefully it works as advertised! The time thing really only becomes a factor when we're fishing somewhere for all week. I would think that 8 hours of charge time should be OK with 10 amps total- most of which will be going to the TM batts. Would it be wise to charge thru the end batt of the parallel or the one the TM is hooked to?

Sorry for all the questions guys- just want my investment to last a little while, you know?

Thanks again for your time...

chico

Share this post


Link to post
Share on other sites
  • 0
wastewaterguru

It makes no difference which of the two batteries you connect the charger to. Pick the one that is most convenient.

Share this post


Link to post
Share on other sites
Guest
This topic is now closed to further replies.
Sign in to follow this  

Announcements



  • Your Responses - Share & Have Fun :)

    • Neutz68
      Nope...   320er...   Thanks for the info.. 
    • fish_time
      I had an absolutely beautiful day on the water. The crappies I caught were over 12" . I personally have to say pink and white, and white on pink is the way to go for spring crappies. Enjoy. https://youtu.be/o19q4K1urBE  
    • Getanet
      Where the heck was this advice a month ago when I was booking our trip!  I knew nothing about Kabotegama and really only had a few choices of campsites available for the dates we wanted to go. Wood Duck Island looked as good as any. After I made the reservation I had read that the west end of the lake had better fishing earlier in the year since it was shallower than the east and the water warmed up quicker. Goes to show you can't trust everything you read on the internet. Even though we got skunked on walleye it was still one of our favorite trips. My buddy and I typically stay at a resort or one of our family's cabins. Camping got us outside doing stuff a lot more. If we had a roof over our head and a TV we would have spent a lot less time fishing when the weather stunk.
    • MN BassFisher
      Haha. We were using mostly Size 11's for our bites - Shadow Raps. Thanks man! Glad you enjoyed it. The last few times I've tried to document our Walleye outings up there we only get like 1 or 2 fish and I don't do anything with the footage so I was glad to catch a handful to edit into a video.
    • MikeG3Boat
      This may not be what you want to hear but the answer is most definitely yes!  The Mega imaging really paints a perfect picture, you do not have to be an expert in reading side imaging any more you just look at the pictures and know exactly what your looking at.  On a side note, the outside case of the Helix 9 and Helix 10 are exactly the same.  I know the 10 is quite a bit more but believe me it is worth it.  I have made the decision to try and save some money many times in my life and only been disappointed, when your wishing you spent the extra cash within a month of your purchase that stinks and it is a really expensive decision to fix.  Just my $0.02.  Good Luck with your purchase.
    • Cliff Wagenbach
      I heard reports that the Fectos Point area has been good. I have not been there though. Big Bay is still going. I caught 7 in about an hour right at noon in pouring rain! Cliff
    • imhatz
      Was at Sand Point 5/17-5/23...did ok only..5 eyes, pike and smallies. The water temp rose so fast it turned off fish. We did better on Friday and Sat...then water warmed and slowed. Most on rapalas...no live bait.. That was a mistake may have done better. Hey slush you in a hot spot...or normal area on Crane. We tried NW bay and only Pike
    • Sushilicious
    • Sushilicious
    • Sushilicious
      So dad, my bro, n I started fishing at 4pm last Sunday (crane). We caught 21 eyes, 4 sauger, n a 10in. Perch. We were fortunate enough that 12 eyes, 2 saugers n the perch were keepers. We also had the pleasure of throwing back two 18", a 22" and a 24" eye. We ended up fishing  for 5 hours. There were 2 thing we noticed that affected r fishing. (A) the lack of water ment lack of current which is fundamental the first 3 weeks of opener. (B) we seen 14+ eyes surface as well as 6-7 mayflies in the boat. Getanet I hate 2 state the obvious but from my quick look at kab u weren't even close to a spot I would think would be good this time of year. The best 4 types of spots the first 3 weeks of eyes opener in vnp r current, current, current, n sand. I've never fished kab this time of year but I know Sullivan bay/ash river is the best spot.