Question:

I have 10 12v batteries and I want to know how to connect them to create 120v...?

by  |  earlier

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I am looking for the difference between in-line and series...

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  1. I am concerned because the question of connecting these batteries to get 120V is very simple, yet the safety considerations are not.  I am concerned that if you do not know such a simple circuit concept that you may be unaware of the safety risks involved.  

    Billruss is correct in pointing out the dangers.  You need to consider things such as:

    - a fuse and switch

    - properly sized wire

    - what to do in case of overheating or fire

    - eye/face protection

    - child safety if applicable

    - proper insulation to avoid shock

    And probably more.  As a EE of 25+ years, my advice would be to research the safety and application considerations before attempting to construct something so dangerous.


  2. In series is in-line;-} the opposite is in parallel.

  3. You can get 120V dc by connecting the 10 batteries in series. Connect the positive electrode to negative electrode of the second battery and so on until 10 batteries are in series.

  4. in series ... +[]-+[]-+[]-+[]-+[]-+[]-+[]-+[]-+[]-+[]-

    You will have 120VDC - do not confuse VDC with VAC

  5. You do not need Ten batteries,because each battery has 13 volts when it is fully charge. Connect ten together shall give you 130 volts,that is good enough to shorten the life of lamp (too high voltage for a 115 volts lamp).

    You need only NINE batteries. Connect them .....the first battery "-"  to the second battery "+" , the second "-" connects to the third battery "+" and so on till the ninth battery. Now ,after you connect them BE CAREFUL DO NOT TOUCH THE FIRST BATTERY "+"  WITH ONE HAND AND OTHER HAND TO THE NINTH BATTERY "-".

    YOU MIGHT GET A ELECTRIC SHOCK EVEN GET KILL.

  6. DO NOT CONNECT THE REMAINING TWO ENDS as suggested by linlyons .

    You would be providing a direct short across 120 volts.

  7. in series  (some times called in line).

    B1- is common negative

    B1+ to B2-

    B2+ to B3-

    B3+ to B4-

    B4+ to B5-

    B5+ to B6-

    B6+ to B7-

    B7+ to B8-

    B8+ to B9-

    B9+ to B10-

    B10+ is common + output

    Be careful. Not only can you get killed, but you can cause quite an explosion or fire if you connect them wrong.

    edit, fizz is correct, this could be a very dangerous situation. Specially as you have no knowledge of electricity. You could kill yourself or someone else, cause a fire or explosion. Also, auto batteries should not be use indoors as they vent dangerous gases.

    Why are you doing this? I can see no use for 120 volts DC at perhaps hundreds of amps.

    .

  8. set them up in a line.

    all facing the same way.

    with each + terminal next to the - terminal of the next.

    connect each adjacent + and minus.

    you'll have 120 when you connect the 2 remaining terminals at the ends.

  9. Connect them in series, positive(+) to the negative(-). When you are done you should have two terminals left, one positive and one negative. these are the terminals you need to use to get power. Remember this will be DC power, you will not be able to run normal house hold 120V load. You will get 120 volts but current will still be low.

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