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Jan 23rd, 2013
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4 batteries 3 bank charger #12396646
08/22/17 09:00 PM
08/22/17 09:00 PM
Joined: Mar 2017
Posts: 262
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Buckshotbuddy Offline OP
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Buckshotbuddy  Offline OP
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So I am wondering what I should hook my 3rd bank To. I have a 24v setup so 2 banks are used there but I'm wondering if I should hook up to my deep cycle that runs graphs and electronics or if I should hook it up to my starting/auto bilge battery.i hear people say you can run everything as far as electronics go off of just your starting battery but my graphs seem to zap juice fast! What would you guys do?

Re: 4 batteries 3 bank charger [Re: Buckshotbuddy] #12396652
08/22/17 09:03 PM
08/22/17 09:03 PM
Joined: Oct 2007
Posts: 18,389
Clayton, NC
Huckleberry Online happy
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Huckleberry  Online Happy
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Clayton, NC
I would say hook it to the battery that has no way of charging itself.

Re: 4 batteries 3 bank charger [Re: Buckshotbuddy] #12396665
08/22/17 09:11 PM
08/22/17 09:11 PM
Joined: Aug 2009
Posts: 1,629
Richland-Chambers
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Capt Craig Offline
Extreme Angler
Capt Craig  Offline
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Richland-Chambers
Tough situation. I run my electronics off the starting battery. Depending on how many start/stop episodes you have in a day, it is possible to run down your starting battery. Also, your dedicated electronics battery has no way to charge if you don't charge it.

In your current set up, you need a 4 bank charger. I would set it up to your TM and starting battery and get a separate single charger for your electronics battery so that you can have all 4 on a charger.

This way if you decide at some point to pull the extra battery, you won't have to rerun any battery wires.


Capt. Craig Copeland
Licensed by the US Coast Guard

2019 Nautic Star 215 XTS Shallow Bay Boat
Humminbird HELIX 12 CHIRP MEGA SI GPS G2N
Nautic Star Boats Pro Staff (nauticstarboats.com)
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Re: 4 batteries 3 bank charger [Re: Buckshotbuddy] #12396738
08/22/17 10:11 PM
08/22/17 10:11 PM
Joined: Mar 2014
Posts: 216
D
D Miner Offline
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Posts: 216
Just buy a cheap battery tender type charger and hook it up to whatever battery is not connected to your 3 bank charger.

Re: 4 batteries 3 bank charger [Re: Buckshotbuddy] #12396830
08/22/17 11:31 PM
08/22/17 11:31 PM
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Buckshotbuddy Offline OP
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Buckshotbuddy  Offline OP
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Great into guys, just to answer a couple of suggestions I have a stand alone charger that I use for my electronics battery right now and I run the boat a decent amount but not enough to put my electronics on without having it in the back of my mind. When I'm running autochart my batteries seem to give up on me about 8 hrs in. I guess my real question is do I have to worry as much about my starting battery since it charges itself. My gauge tells me it's full after being on the charger for like 5 minutes so I feel as if I'm wasting a bank.

Re: 4 batteries 3 bank charger [Re: Buckshotbuddy] #12397056
08/23/17 02:24 AM
08/23/17 02:24 AM
Joined: Nov 2014
Posts: 6,858
Red Oak, Galveston, and Pagosa...
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SteezMacQueen Online happy
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Red Oak, Galveston, and Pagosa...
You can parallel the starting battery and electronics battery to one bank of the charger, just remember two things....

1. It takes longer to fully charge both batteries when they share a bank
2. Remember to un-parallel the batteries after charging.


Eat. Sleep. Fish.
Re: 4 batteries 3 bank charger [Re: Buckshotbuddy] #12397068
08/23/17 02:29 AM
08/23/17 02:29 AM
Joined: Jul 2014
Posts: 3,674
Arlington
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Bobby Milam Offline
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Bobby Milam  Offline
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Arlington
Or you could run two of the batteries in parallel. You'll have the same voltage but more capacity and then you could connect that charger to charge the two batteries as if they were one. I run 4 batteries, 2 for trolling motor, one for the starter and one for electronics for the same reason as you. Last week, I ran two of the batteries in parallel to test and see if their capacity was large enough to keep everything going and this way every time that I run the motor I will be putting a charge in both.

Now, I have 2 two bank chargers in the boat so I charge all separately but yours should just take a little longer to recharge if they are low. I was warned against it by someone because of the possibility of one battery going bad but if that happens, I can always disconnect them on the water and connect only the good battery.

Theoretically, your cranking battery should be charged and can get by without charging it every trip BUT, do you have anything that might draw current while it is stored? What if you accidentally bump a switch and turn something on while it is stored and you don't find out until you are at the lake? Could ruin a day of fishing.

Re: 4 batteries 3 bank charger [Re: Buckshotbuddy] #12397074
08/23/17 02:33 AM
08/23/17 02:33 AM
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Arlington
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Bobby Milam Offline
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Arlington
Steez, I saw you answered while I was typing. Why does he need to un-parallel after charging?

Re: 4 batteries 3 bank charger [Re: D Miner] #12403896
08/28/17 12:14 AM
08/28/17 12:14 AM
Joined: Jan 2013
Posts: 621
West Texas
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reelswift Offline
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West Texas
Originally Posted By: D Miner
Just buy a cheap battery tender type charger and hook it up to whatever battery is not connected to your 3 bank charger.


The above is a viable option. juggle

Re: 4 batteries 3 bank charger [Re: Buckshotbuddy] #12403976
08/28/17 01:11 AM
08/28/17 01:11 AM
Joined: Jun 2007
Posts: 405
Arlington, TX
ToadThrower Offline
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Posts: 405
Arlington, TX
Here's what I installed,I have one battery for starting and one for the electronics,
https://smile.amazon.com/gp/product/B000RZNP5K/ref=oh_aui_detailpage_o00_s00?ie=UTF8&th=1

Using this the starting battery charges first and when fully charged the electronics battery is charged. You can combine both batteries in the event you need a boost. As I understand hooking them in parallel both batteries will discharge at the same rate and charge at the same rate...so if you discharge them below what is needed to start the motor both will be dead. It should take longer to discharge them, but it will also take longer to charge them using a single bank or charger with them hooked in parallel and if one battery is weak it will discharge the other...so there are some draw backs in hooking them in parallel .

Re: 4 batteries 3 bank charger [Re: Bobby Milam] #12404770
08/28/17 05:32 PM
08/28/17 05:32 PM
Joined: May 2011
Posts: 559
NE Texas/SW Arkansas
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Jones Trolling Motor Offline
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NE Texas/SW Arkansas
Not Steez, but they should be disconnected in some type way -- my preference is with a battery selector switch. If connected, the lower of the two (they will not be at the same rate of charge) will become a load on the fully charged battery and draw it down trying to equalize. If one goes bad, it will drain the other as a load. If separated, then a bad or low battery will not drain the other.
John


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www.jonestrollingmotor.com
texarkana, Ark/Tx
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