Quantcast

More 12/24 volts question

Nitro & Tracker Owners

Help Support Nitro & Tracker Owners:

Steve Helscher

Well-Known Member
Joined
Nov 14, 2000
Messages
145
Reaction score
0
In a post below, someone answered that there are three wires for the 24 volt draw. On my ProV Combo, I have two sets of wires. Red and Black. One set is for the 12 volt and the other set is dead because my TM plug only connects with the live wires. My question then, if I move to a 24 volt trolling motor, do I hook each set to its own battery to get the 24 volts? That is how it looks to me.
 
Joined
Nov 1, 2000
Messages
15
Reaction score
0
Sounds like somebody ran two sets of wire up to your trolling motor plug, to then make the connections in series to get 24V. On the other hand, somebody could have decided to run dual pair of a smaller conductor wire to decrease resistance on a 12v system.



The optimum solution to what you have is to configure the batteres in series with heavy gage cable, then use 3 of 4 the wires you have, if they are heavy enough for your 12/24V plug. Follow the the instructions on the below post to hook it up, as they were very good.



This is just a guess, I can't really tell what you have by the description you indicated. I have seen some very funky wiring on boats.
 

Steve Helscher

Well-Known Member
Joined
Nov 14, 2000
Messages
145
Reaction score
0
It came from the factory like that. The specs say it is wired for a 12/24 volt system. If this is the case, what is the difference between what is posted below, versus putting the 2 sets up in series?
 

Russ Charles

Well-Known Member
Joined
Jun 1, 2001
Messages
211
Reaction score
0
Some boat manufactures wire with 4 wires (2 red & 2 black) to the front so that you can use a 4 pin plug, and charge from it. The 2 pos wires are usually through a 40 amp circuit breaker for each pos (red) wire. 12/24V motors use 3 wires (1 for common, 1 for 12V, and 1 for 24V). The way it should be wired if you want to charge from the plug is as follows. Use a 4 pin twist lock receptacle and plug. Lets call the pin with the locking tab #1 and clockwise from that pin #2, 3, & 4. Wire battery #1 gnd to pin 1, battery #1 pos to pin 2, battery #2 gnd to pin 3, and battery #2 pos to pin 4. On the trolling motor male plug wire gnd to pin #1, 12V to pin #2 and 24V to pin #4. Short pins 2 and 3 together. On the battery charger male plug connect the charger pos to pins 2 and 4 and the charger neg to pins 1 and 3. That will charge the 2 batteries in parallel. A 20 amp charger is recommended.



The above method has one disadvantage in that when the trolling motor is being used in the 24V position the wire that is effectively connecting the pos of battery 1 to the neg of battey 2 is about 40 feet long and since the current path is in series there is more voltage dropped over the long wire, even if it is #4 size and even more if it is #6 size.



The better method is to connect the pos of battery #1 to the neg of battery #2 at the batteries and only run 3 wires forward, but now you must charge each battery independently either with a 2 bank onboard charger, or 2 battery chargers.



I hope this doesn't sound too confusing, but it would be a lot easier to explain with the help of a diargam.



Russ C.
 

Latest posts

Top