I have a 24 volt TM and am wondering if there is a way to hook up 4 batteries to it for more TM running time. I fish in heavy current alot for 8 to 10 hrs. and outting. I need to get more draw time from my batteries. Many days I can only get 6-7 hrs. out of my current 2 batteries. I hope my queston is clear, I'm not sure how to ask it better. thx for any help.

I don't know that I'd want the extra weight of 2 additional batteries in the boat, I actually wounldn't even have room for them and my boat is a 20 footer....Have you thought about going up in group size?  It makes a pretty noticeable difference going from a 27 to a 31, just as an example.  

The answer is YES. Just wire the batteries in series and parallel.

ie: 4 12v batteries each with 100 ah. In series+parallel you end up with 24vdc system with 400 amp hours.

 

You can probably find some diagrams on Google.

 

Edd

Diagram sent in PM

great thanks for the imput

You could run 4-6volt golf cart batteries and it would run all day also. I have this setup in my reservoir rig, the reservoirs I use it in are electric motor only. I was running with 12s but had to do multiple battery swaps to stay out all day, and now I don't swap nothing. If your going to run them in parallel make sure you use a breaker, because if you get a short it will most likely cause fire because of the doubled amps.

You could run 4-6volt golf cart batteries and it would run all day also. I have this setup in my reservoir rig, the reservoirs I use it in are electric motor only. I was running with 12s but had to do multiple battery swaps to stay out all day, and now I don't swap nothing. If your going to run them in parallel make sure you use a breaker, because if you get a short it will most likely cause fire because of the doubled amps.

You don't get doubled amps, you get double amp capacity. The motor is the same load either way.

You don't get doubled amps, you get double amp capacity. The motor is the same load either way.

The motor loads the same but if you get a short it will pull the full load of both batteries which is enough to burn up the wire and catch fire. I'm not saying not to rum them that way, I have my front motor running on 2-12s in parallel but I have a fuse in line so if a short occurs it will just pop the fuse not burn up my boat.

The motor loads the same but if you get a short it will pull the full load of both batteries which is enough to burn up the wire and catch fire. I'm not saying not to rum them that way, I have my front motor running on 2-12s in parallel but I have a fuse in line so if a short occurs it will just pop the fuse not burn up my boat.

Do you have a fuse or circuit breaker between the two batteries?

 

Most with any common sense will have a circuit breaker on the motor's positive wire at the battery/s.

The answer is YES. Just wire the batteries in series and parallel.

ie: 4 12v batteries each with 100 ah. In series+parallel you end up with 24vdc system with 400 amp hours.

 

You can probably find some diagrams on Google.

 

Edd

No you don't, you get a total of 200 amp hours. Series only doubles the volts.

 

Two 100 ah batteries parallel gives 200 ah capacity. Two 200 ah capacity batteries in series is still 200 ah. at 24V

No you don't, you get a total of 200 amp hours. Series only doubles the volts.

 

Two 100 ah batteries parallel gives 200 ah capacity. Two 200 ah capacity batteries in series is still 200 ah. at 24V

Maybe you missed the part that said 4 batteries.

Do you have a fuse or circuit breaker between the two batteries?

 

Most with any common sense will have a circuit breaker on the motor's positive wire at the battery/s.

To be honest I even have fuses on my negative side just in case of a reverse polarity situation, a few bucks for a coupl extra fuses is a lot better then replacing my boat.

Maybe you missed the part that said 4 batteries.

 

Maybe you missed the part that said 4 batteries.

Maybe you missed the part where I stated two 100 ah batteries is 200 ah. 

Those 200 ah batteries in series is 200 ah at 24V.

 

That's four 100 ah batteries.

Yes you are correct! I don't know what I was thinking. The ONLY way he can double the capacity is to connect in parallel.

 

Edd

Solar charger?

Not that I really have a dog in this fight but after all the diagrams and buying 4 batteries and hoping it would work, couldn't you just buy a 36V TM and probably make that work? Seems like that would be a more permanent solution. IMO 

Not that I really have a dog in this fight but after all the diagrams and buying 4 batteries and hoping it would work, couldn't you just buy a 36V TM and probably make that work? Seems like that would be a more permanent solution. IMO 

and if he can one with more thrust as well which would let him turn down the motor hence using less power and less draw.  Always better to have more then you need then not have enough when you need it.  But I'm like you, no dog in that fight.