Thread: When arguring 12v vs 24v

Originally Posted by Barnacle Bill

This thread was opened to discuss 12v vs 24v. It was not opened for more bickering about the one closed. If you want to continue your argue please use PMs.

Enough argueing...everyone please just run what you like the best

Please just keep the conversation civil and on topic. That'll keep the thread from getting closed. Thanks for understanding.

When adding batteries in parallel, you double the current and the voltage remains the same. When you add batteries in series, the current remains the same and the voltage doubles. Of course, I am speaking of equal voltage/current batteries. Power is Power, you can't get something for nothing. 12v @10 amps is 120watts. 24v @ 5 amps is 120watts. Ohm's law. If you read and understand Peukerts Law, then the basic difference in longevity is the physics of the batteries and not the motors themselves.

Originally Posted by Cane Pole

When adding batteries in parallel, you double the current and the voltage remains the same. When you add batteries in series, the current remains the same and the voltage doubles. Of course, I am speaking of equal voltage/current batteries. Power is Power, you can't get something for nothing. 12v @10 amps is 120watts. 24v @ 5 amps is 120watts. Ohm's law. If you read and understand Peukerts Law, then the basic difference in longevity is the physics of the batteries and not the motors themselves.

Thanks Cane Pole - finally someone with a crappie.com trusted opinion said the same thing I have been trying to tell ATM since the beginning.

The (2) 100A/H batteries in series gives 100A/H total! not 200A/H

When we go to a 24v system we wire the 2 batteries in series and have 100 AH available. We have already established that the 24 80 lb system will use about 38.5 amps per hour to pull at 55 pounds of thrust. Now this is where the 24 system seperates itself. With our batteries wired in series we are able to pull off both batteries at once to get our 38.5 amps. This produces a pull of 19.25 amps per battery for 1 hour of pull time. Since we only have 100 AH available we divide the 100 by 19.25 amps to get a run time of 5.19 hours for our 24 v system. Hence the reason a 24v system is more efficient and has longer run times.[/QUOTE]

Be nice here please. Just sayin.

Originally Posted by atm

when we go to a 24v system we wire the 2 batteries in series and have 100 ah available. We have already established that the 24 80 lb system will use about 38.5 amps per hour to pull at 55 pounds of thrust. Now this is where the 24 system seperates itself. With our batteries wired in series we are able to pull off both batteries at once to get our 38.5 amps. This produces a pull of 19.25 amps per battery for 1 hour of pull time. Since we only have 100 ah available we divide the 100 by 19.25 amps to get a run time of 5.19 hours for our 24 v system. Hence the reason a 24v system is more efficient and has longer run times.

Cane Pole - please weigh in and tell ATM that his #'s are WRONG. The motor will draw 38.5amps from the available 100A/H resulting in 2.6 hrs run time. It does not "pull" 19.25 from each. It draws 38.5 from the total 100.


ATM - If Cane Pole agrees with me will you please stop this mis-information? If Cane Pole agrees with you then I will do the same.

Thanks

Try this test - put a 20amp fuse in line with your motor - if you're only "pulling" 19.25 amps it won't blow, right? I bet you it does when you draw the 38 I'm saying you draw.