Maybe this might help someone.
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Maybe this might help someone.
Based on picture #3 with the 12v line along with the 24v. Can you run the 12v line to a seperate fuse box and run some of your electonics that way rather than all coming from your main battery? I have a 24v trolling motor, will this mess it up if you do this? Are you pulling 12v from just the one battery using this if in fact it would work?
That picture is for the older 12/24 trolling motors. If you are set up that way, yes you could use the 12V lead for other things. But I wouldn't recommend using it for a depth finder or GPS as you can get interference from the trolling motor. And yes the 12V comes from 1 battery. If you do it, double check yourself with a meter. You don't want 24V going to anything except the TM.Quote:
Originally Posted by boat49
12 volts will come from one battery but they seem to equal out on my meter as the die when pulling 12 off as shown above.
I have had to put two (up to five) dead batteries to keep fishing at night.
A meter is HANDY TOOL wish i understood everything on one.
Good post
Ok my head hurts now trying to figure out how to rig my batteries better. My cranking Batt runs the Motor the bilge and the Airator. My Deep Cell runs the bow mounted fish finder and trolling motor. Should I do anything to change the way I have them configured. I have an onboard charger but prefer to unhook the deepcell and charge it in the Garage.
If you are not getting any interference from your TM on your finder leave it like it is. As your TM battery gets weaker while fishing, your finder may shut off when you step on the go switch. I'm curious tho as to why you remove your TM battery for charging if you have an on-board charger. When I get home I plug mine in and forget it until next time to go. Of course I have driven off a few times and forgot to unplug the extension cord. :eek:Quote:
Originally Posted by SMITTY 58D
The onboard charger is hooked up to the cranking battery. I switched it a while back to the cranking Battery when I was having problems with the old TM Battery (just never changed it back). I've since replaced the TM battery and the charger I have in the garage charges a bit faster. It is a pain though lugging the Batt back and forth. I use to bring the charger out to the boat but I one day chased a cat out of my boat and am afraid the clamps will come off the Batt and have an early 4th of july.
A digital voltmeter and this chart (thanks to Canepole) will tell you.
Wheres the picture?Quote:
Originally Posted by IBNFSHN
They disappeared for some reason
Thanks for the post. I just bought a used 12/24 today and wasnt sure how to wire it up!
I have another question...that I didn't see covered in the forum.
I am looking at getting (2) Guest (two bank) chargers to connect to my four batteries. Two are way, way cheaper than a four bank charger. Plus being on sale for $50 bucks each....
Now my question. I am expecting to hook one lead from the charger to the starting battery. Then I get lost, as my trolling motor batteries (2) are wired in parallel. Since they are already connected together, do I hook just one lead from the charger to one of the batteries to charge both, or hook a seperate lead to each battery for a true two battery charge? Then my second lead from the charger on the starting battery will charge an auxillary battery.
The charger states is works with lead acid, gel or agm batteries...what about marine batteries (would this be the same as a lead acid)? Or is the charger not what I need?
http://www.cabelas.com/prod-1/0056609019523a.shtml
Thanks in advance...
You can get marine batteries with lead acid, gel or AGM so you are ok there. Hook one of the chargers to the TM batteries (1 lead to each or both leads to one of them since they are hooked in parallel). The other charger hook up just like you said. One lead to the starting battery and the other to the aux. You could get by with one 3 bank charger. But by doing it the way you said, if you ever decide to go to a 24V TM, you won't need a new charger.
thanks bill....that helps a lot....
when wiring in parallel do the batteries have to be the same amps? They are both deep cycle, but one have more amps that the other? just wondering
They don't have to be but will work much better if they are.Quote:
Originally Posted by tommyboyrn
I have a buddy that has his front and back fish finders connected on the same power post, do you know if this could be causing a problem with his equipment?Quote:
Originally Posted by IBNFSHN
He is losing the bottom on his back fish finder once and a while and it's acting very eratic. Let me know what you think
NO, he is probably just getting interference from the front DF. This can happen a lot in deeper water when both DFs operate at the same frequency. Thye next time it happens tell him to turn the front one off temporily and see if it clears up. Make sure they are connected to the starting battery and not the the trolling motor battery.Quote:
Originally Posted by Jig Wig
Hey thanks for the quick response we will try that the next time out!
I just bought a boat that has a 12 volt trolling motor but has two batteries hooked to it, positive to positive and neg to neg. Is it wired this way so the batteries will last longer and when I hook my charger up do I need to hook to just one of the batteries and will it charge both at the same time? Thanks
Quote:
Originally Posted by CUZZIN
Yes, as long as both batteries are the same type and capacity and in good condition, they will look like one big battery to the charger..., and you will get twice the run time as one battery. As the batteries are hooked up in parallel, both will charge at the same time.
Dave
Thanks Dave for the quick response this is the most helpful forum there is.:)
WOW! Great and helpful thread! I have one more question for you that I didn't see answered. I have my 2, 12 volt trolling batteries hooked in series to give me 24 volts to run my trolling motor. I currently charge these seperately, with my Sears battery charger, using the "Automatic, Deep Cycle" setting. I charge my single, 12 volt cranking/depthfinder battery using the "Automatic, Conventional low Maintainance" setting. Now, there is one more setting on the charger per a seperate switch for "12 volt" or "24 volt".
My question is, is there a way to leave my two deep cycles connected together with the positive to neg jumper, and charge them both at once? Or should I just continue onhooking the jumper and charge them seperately? Would I hook the pos/neg from the charger to the pos of one and the neg of the other (the ones not in use by the jumper?) Would I set the battery charger switch to the "24volt" side or the "12volt" side? I'm assuming I would still charge as "automatic, Deep Cycle, Maintainance free".
Thanks for your help!
I have a little tip for some of you who want good batteries, for little or no cost and much less weight.
I'm an aircraft mechanic and many of the aircraft I work on now use sealed, gel cell batteries. They come in 12v, 24v and 28v. These batteries are required to have a "capacitance check" every year and usually fail because the parameter is so stringent for aircraft (rightly so), but they will still "live" a nice long life in a boat (or tractor or whatever). The "footprint" on these batteries are usually smaller and they are lighter than auto/boat batteries. Also they are a deep cycle battery. I have used them in boats for years now. I run my 12/24 volt TM off of just one 24v battery only and just don't use the 12v side of it. I also have one for my cranking battery.
Now here is the kicker...
These batteries are not serviceable, so when they fail the "cap check", most all aircraft maintenance facilities just throw them away, unless there is someone there like me who uses them. These batteries cost $2,000 to $3,000 new, and they are throwing them away by PAYING someone to haul them off. My suggestion? Drop by your local airport and visit a maintenance facility and ask them if they have any old batteries they want to get ride of. Just make sure they don't give you a Nickel Cadmium, they weigh a TON.
i was wondering the same thing only i dont have a 24v selection on my charger. i think i should charge them seperatly without the 24v selection just not sure.Quote:
Originally Posted by slydog1227
Slydog, yes you can charge both T/M batteries at once. Connect the charger just like you connect the T/M and set the charger for 24VDC.
Without the 24V selector you MUST charge each battery seperately if they are wired in series for 24V. It is not necessary to disconnect them. Just make very sure the connections from the charger only go to one battery at a time.Quote:
Originally Posted by DEX
here is a question for you. I have three optima blue top marine battery's. The label says starting. Can I use two of them for my 24v trolling motor or do I need two that say starting/deep cycle? Also, what is the best onboard and portable charger to use for them? Thanks in advance for your response.
still having peoblems i have battires in series in the back i have a 4wire connector plug on back side the trolling motor plug has 4 males plugs. i read at the back of plug had 24v on one side i go to plug trolling plug in without trolling motor hook to hit it blew fuse do not under new motor can,t hook it up ,help
still having peoblems i have battires in series in the back i have a 4wire connector plug on back side the trolling motor plug has 4 males plugs. i used volt meter at the back of plug had 24v on one side i go to plug trolling plug in without trolling motor hook to hit it blew fuse ,do not under stand new motor can,t hook it up ,help
Go back to Crappie. com and post a new tread relating your problem. I'm sure a boat mechanic will reply and get you an answer to your problem. You need somebody smarter than I to help you on this one. Good Luck
Jig Wig