Is there an advantage in running a battery setup with 2 12V batteries in parallel or is series for a 24V circuit. Are they brighter 24V? i know they use less amps 24V but also use more V so is there a battery life differance one way or another?
running LEDs 12 or 24 V
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czachary
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Ok so 4 batteries at 24v. Will last twice as long as 2 batteries correct. So say it last 244 mins with two batteries it would be 488 mins with 4.
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My point is power consumed will be the same whether you run leds on 24 volts or 12 volts. If the power consumed from the batteries is the same-12 or 24 volts-battery discharge rates will be the same 12 or 24 volt. Same discharge rate=same run time.
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Yea I can see that I'm saying a 12v bat. With a 30 amp hr will run say 244 mins. So series it up with one one same battery does the run time double? So that a four battery 24v will last twice as long as a two battery?
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Bingo, assuming the same load. Throw an 80lb troller in there and that 488 will go waaay down.
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Probably a little longer since the battery discharge rate will go down.
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Nice that's what I'm doing going to get four batteries to run all 20 lights. Need to beef up the capacity.
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Since we are now talkin apples and oranges,beendare,......I know a thing or 2 bout them:
Oranges is way more better cause if you ain't got nothin
ta drink,an you eat one,you ain't thursty no more.
Also you can use the juice from the Orange peelins to get stains out and clean stuff.
But come to think bout it,I like me some apples pretty good too?
Not sure on wire size OBG,used old stuff layin round.
Oranges is way more better cause if you ain't got nothin
ta drink,an you eat one,you ain't thursty no more.
Also you can use the juice from the Orange peelins to get stains out and clean stuff.
But come to think bout it,I like me some apples pretty good too?
Not sure on wire size OBG,used old stuff layin round.
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I think you are probably reading it right but not taking into consideration that it takes two 12 volt batteries in series to make 24 volts.
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So whats your guys opinion, I got a 14 ft boat with batteries in back and led's in front. wire 24 volt or 12 volt? I'm thinkin just go 24 so I can save money on wire. cause from what you guys have been saying thats really the only advantage right?
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If these charts and my methodology are correct, there should be a clear advantage to 24V.
Assume you have a 240 watt demand which is 20 amps at 12volts and 10 amps at 24volts
taking from the chart above; a 27tm gives you 207 min @ 20A, and 515 @ 10A
Connect 2 of these batteries in parallel [12V pulling 20A] gives you 2 x 207 =414 min
Connect 2 in series [24Vpulling 10A] = 515 minutes......................a 24% increase
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Let's asume the chart is correct because it is. Let's also assume there are two 12 volt batteries involved since it takes 2 of them to make 24 volts. Figure also that our lights will draw 20 amps @ 12 volts or 10 amps @ 24 volts.
Running on 12 volts and with 2 batteries in parallel the lights should draw 10 amps @ 12 volts from each battery[+ or - since no 2 batteries are exactly alike] for a total of 20 amps @ 12 volts.
Running on 24 volts and with 2 batteries in series each battery will still be required to put out 10 amps @ 12 volts in order to make 10 amps @ 24 volts in series.
Since the chart is based on battery discharge rate - same discharge rate equals same run time.
Your figures would be correct if when running on 12 volts you had the 2 batteries seperate-ran one down and then connected the lights to the other. This would give you a faster battery discharge rate than splitting the load between 2 batteries in parallel.
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It's actually a confusing question with a simple answer. Had me scratching my head and thinking twice when the discharge rate issue was brought up some time back.
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Beendare you are correct. because one battery doesnt produce 10 amps and the other 10 amps, they both produce 20amps in parallel and are subject to peukerts LAW.
If your theory was correct the chart would show batteries having higher capacity(2 batteries in parallel) they would not suffer from lower reserve capacity, but they do at higher amps.
I think their is a lack of understanding how capacitance effects a lead acid battery, this isnt simple ohms law here.
If your theory was correct the chart would show batteries having higher capacity(2 batteries in parallel) they would not suffer from lower reserve capacity, but they do at higher amps.
I think their is a lack of understanding how capacitance effects a lead acid battery, this isnt simple ohms law here.
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Easy enough to find out. Someone needs to hook up some leds and run them 12 and 24. Figuring that the low voltage cut off will favor the 24 volt set-up, 20 amps @ 12 volts worth of leds should run about 2 hrs longer @ 24 volts on two standard group 27 deep cycles if you guys are right. I don't see it happening but have been wrong once or twice before.lol
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If that were correct 2 batteries in parallel would have the same run time as a single battery-load being equal. imo
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If you parallel them their capacity doubles, same potential driving them but twice as "big" of cells. All of which have a chemical reaction to produce 20 amps out of every 2v cell in the the 12 or 24v system. Cant confuse capacity with discharge rate.
As far as testing, it would be very difficult to guarantee the batteries in the exact same condition, same electrolyte levels, etc etc.
For the record I do think manuf. are over cautious with their ratings and deratings, a cover their a$$ thing I think.
As far as testing, it would be very difficult to guarantee the batteries in the exact same condition, same electrolyte levels, etc etc.
For the record I do think manuf. are over cautious with their ratings and deratings, a cover their a$$ thing I think.
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