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ok guys got a question today from a member on this site , he is wanting to switch from a 12vlt to 24 vlt setup, he only has room for 2 batteries , ive read and heard that you shouldnt run your electronics from cranking battery, whats your advice and how would the batteries need to be wired, thanks for you help and advice in advance?
I have 3 batteries in my boat. I run my electronics off of my cranking battery. I run the trolling motor off of the other 2 but I'm running on 12 volts. The trolling motor batteries are 2 12volt hooked up in parallel. There is no interference picked up by the HBs.
Thnx Greg for posting the question. I talked with several people today and is leaning towards putting a third battery in a storage compartment adjacent to the battery box and extend the cranking battery and all other lines over there. That way, the current two batteries can be dedicated for the the TM only.
Greg, it's the same as a LOT of 36v trolling systems on the bigger bass boats. A bunch of guys only run 3 batteries. Shouldn't be an big issue to do it. The batteries are ran in parallel to achieve the 24 volts for the trolling motor then you would just hook up one Battery as you would normally for your cranking battery and electronics. To achieve the 24 volts it needs to be -to trolling motor then with a jumper wire + to (- 2nd battery) then (2nd battery + to trolling motor. Hope that makes sense.
Thnx Old Sarge, would that cause any interference in the electronics? When you bump the TM, it's still pulling from that battery where the electronics are connected.Quote:
Originally Posted by Old Sarge
I have a 36 volt trolling motor and only three batteries in the boat. I run graphs and cranking off one of the tree with no interference. I do carry a portable jumper pack just in case big motor will not start. I would say try two first and save the weight and money. Just my two cents.
Thnx Tedford, it's always nice to save money.Quote:
Originally Posted by l_tedford
This is the best solution. If you decide to go with 2 large batteries, you can use a small gel cell to run your electronics if you get interference from the TM.Quote:
Originally Posted by Jiggermaxx
I run my electronics off my cranking battery. Tm batteries are dedicated to Tm in my boat. Works well for me, also if you add a third put the two together for the Tm and use the separated third one for your cranking and electronics. Just my opinion.
what type of boat does he have,someone may be able to help better with that info
2012 Bass Tracker 175 TFQuote:
Originally Posted by blueball
My concern is if I only use two batteries or both TM and cranking. I will get interference in electronics. Tight for space.Quote:
Originally Posted by arkansasbowhunter
pm u a link that might help,:fish
Radio Shack has some clip on chokes that you can put on the hot wire to help eliminate interference. No guaranties, but worth a try. They are Cheap!!! 2-3 bux each.
Greg, if you go to google and type it in it has a diagram how to do it.
No way of knowing your answer jig, but in my experience yes you will get the interference that's why it's recommended no to out on tm batteries with the hd units. Like Brm said you can try to choke it but that never helped with mine when I had issues but it's a cheap fix if it works.
I run everything off cranking battery. My two (12 volt) batteries for 24 volt trolling motor in front box to hold front down.
Though I don't have a 24 volt setup I do have a 12 volt setup. My trolling motor is ran off it's own deep cycle battery and a manual reset fuse breaker. Everything else is ran off my cranking battery which is all ran to a 6 circuit fuse block.
I had a boat one time that without some serious creative thinking would only accommodate 2 batteries. I wanted a 24 V TM. So, I got it. Connected it to both new group 27 batteries. One of the batteries was used for cranking, the other I connected the electronics. I did this twice in my life, the first and the last.
About lunch time the batteries were starting to get a little weak, and that's when the delima started. Every time I would hit the TM it would draw enough amps to cause the electronics to shut off. Then the next thing, the big motor wouldn't start.
At this point, u need a cell phone and a good friend. Maybe a booster too.
If you don't have a continuously variable speed trolling motor such as a Terrova or Power drive, etc, you are less likely to get interference. These trolling motors use pulse width modulation and this results in a greater chance of it interfering with the depth finder. Give it a try with 2 batteries and see how it goes. I ran a 12v pwm motor and a df off of 1 battery at the same time with no ill effects.
The guy that built my boat had my front graph running off the 24 volt for my trolling motor and the graph not only had major interference but got very hot when I had the charger plugged in.
Another little trick that eliminated interference for me when getting power straight off the cranking battery... Make sure you have plenty wire, then add some more as it will get shorter with this method. Take your pos and neg wire(same length) and put one end of each in a vise. Chuck the other ends in a drill. With the wire stretched out at full length, turn your drill on and twist it until you get about a couple turn per inch. Easier to run too. Eliminated the interference I had..
here is what i did. i put two batteries in my front compartment and plenty of room to spare for charger, tackle, crank boxes, etc. this short distance to my trolling motor allowed me to use heavier gauge wire with no problem running it. right now i have a 12v power drive v2 and utilize both batteries and should i find a absolute steal on a 24v terrova i can change in a matter of minutes to accomodate it... i still have two batteries in the back, one for cranking, one for everything else. if you have the room this is, IMO, the way to go....good luck
http://i269.photobucket.com/albums/j...5-11-14003.jpg
I wouldn't run anything (except possibly simple electronics) on my starter battery. My 50 hp tldi Nissan requires a minimum 850 cca battery to run. I want to be sure I can get home! However, smaller motors don't need as much battery--my old 25 hp motor used a motorcycle starting battery, as do my elec. start 9.9 hp motors.