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Home Forums Technical Discussion 2 volt batteries vs 6 volt or 12 volt

This topic contains 4 replies, has 5 voices, and was last updated by  CoraDias 1 month ago.

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  • Author
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  • #37191

    RayK
    Member

    Recently moved to AZ and am setting up a PV system. Can purchase 2 volt 1110 AH batteries for nearly same price as 6 volt 370 AH ones. Why wouldn’t I go with the higher AH batteries for my system?

    #43054

    12vman
    Participant

    That depends if you have enough PV to keep them charged properly..

    #43055

    ttab
    Participant

    RayK;

    If you buy three 2 volt batteries and wire them in series you will have 6 volts at 1110 AH. Or you could buy three 6 volt batteries and wire them in parralel and you will have 6 volts at 1110 AH. So it is pretty much whatever you want to do….

    Good Luck!

    ttab

    #43057

    Dustoffer
    Participant

    I have never seen a 6VDC inverter! How many thick cable connections do you want to make?($$$) How much room do you have?

    #60381

    CoraDias
    Participant

    Hi…as per my knowledge RC is measured in minutes @ 25A power draw, so 120 means the batteries will be completely dead (10.5v) after two hours of use with a steady 25A load. In practice a typical marine/RV battery would be somewhat damaged if you actually ran it down to 10.5v, but RC is a laboratory measure. RC and AH are used for battery comparison, not estimates of practical run time.

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