Does connecting 2 12 volt batteries double the voltage or stay the same? ?

Question

i believe that no mater how many batteries you connect it will stay the same 12 volts but the amperage will add up, so if i connect 2 12V batteries rated at 50 amps @20 hours that should give me a 12 volt system rated at 100 amps @ 20 hours, right?

thanks for the help

Answer 1

Not sure about the amps but no, the voltage won't go up.

Answer 2

Connect them in parallel, the voltage stays the same and the current adds.

Connect them in series, and the voltages add, and the current stays the same.

so yes, in your example, if you connect them in parallel, ie, + to + and - to -

.

Answer 3

series or parallel...this matters

in series the voltage would double...12 + 12...the voltage would be 24..simple math

but in parallel the voltage stays the same 12v

in series you would hook 1 negative to 1 positive and then the output would be take from the leftover positive and negative to equal 24v

in parallel..the positives and negatives would be hook together and the voltage would not change.

Answer 4

Imagine a house brick is horizontally 12 inches long and 3 inches high I have 2 of them. Now imagine a + mark painted on the left hand sides and a - mark painted on the right hand sides. Now if I lay them on the ground side by side to give a horizontal length of 24 inches a height of 3 inches and a pattern of + .....- +.......- this shows the arrangement of 2 batteries connected in series. The voltage measured between the far left + and far right - will be 24 volts. Batteries wired in series Add together. The height represents the current which remains the same as for one battery. So in series Double the Volts current = same

Now arrange the bricks on top of each other with the 2 +marks on top of each other and the 2 - marks on top of each other This represents 2 batteries wired in parallel. The horizontal length is just 12 inches this represents the voltage the height is now 6 inches this represents the current. So wiring batteries in parallel the Voltage is the same but the current available is doubled

Answer 5

depends how you hook up the batteries, wired in series and the voltage will add up (12+12+12), if they are wired in parallel the voltage stays the same

wired in parallel yes its 12 v @ 100

parallel is a wire from pos. to pos. terminals

series is a wire from the neg. terminal on the first battery to the pos. terminal on the second battery

Answer 6

From what you're saying, you want to connect the batteries in parallel (- to -, + to +). So, yes, the amps add up but the volts stay the same.

If you wired them in series (- to +) then the voltage goes up but the amps stay the same. Actually, that's how a 12V battery is made: six 2V cells wired in series. That's why a typical car battery has six vent caps, one for each cell.