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    I have a 6v 7ah battery I would like to use as a 12v backup

    Is it possible to use it via some kind of converter, or maybe link two 6v batteries together to output 12v? Thanks.

    7 Comments

    Just link two batteries in series to give you the 12v requied.
    i.e. connect the +ve of one battery to the -ve of the other then the spare +ve and -ve terminals of the batteries to your load you want powering :thumbsup:

    Original Poster

    Cool, I always wondered what 'in-series' meant. Is there a limit to how many batteries can be linked together like this, ie. could I have 4x6v7ah batts in series and still be outputting 12v?

    Scribbles;2192979

    Cool, I always wondered what 'in-series' meant. Is there a limit to how … Cool, I always wondered what 'in-series' meant. Is there a limit to how many batteries can be linked together like this, ie. could I have 4x6v7ah batts in series and still be outputting 12v?



    You can arrange 2 lots of 2 in series in parallel, if you see what I mean, which would give you 12V output, but generally placing batteries in parallel is to be avoided (especially if they are not identical and equally charged). The batteries are made up of 2V cells connected in series anyway so there is no limit to how many you could join up this way (although obviously the higher the voltage/available current the more danger the setup would pose!)

    [FONT=Courier New]_____________ +|[COLOR=White]....[/COLOR]| … [FONT=Courier New]_____________ +|[COLOR=White]....[/COLOR]| +[COLOR=White]....[/COLOR]+[COLOR=White]....[/COLOR]^ B1[COLOR=White]...[/COLOR]B3[COLOR=White]...[/COLOR]| -[COLOR=White]....[/COLOR]-[COLOR=White]....[/COLOR]12V|[COLOR=White]....[/COLOR]|[COLOR=White]....[/COLOR]| +[COLOR=White]....[/COLOR]+[COLOR=White]....[/COLOR]| B2[COLOR=White]...[/COLOR]B4[COLOR=White]...[/COLOR]| -[COLOR=White]....[/COLOR]-|____|_______ -[/FONT]

    Original Poster

    I just want to have 4 or more batts in my shed, suitable for powering outdoor lights and suchlike via an inverter. Ideally, the setup would be powered by a solar panel or a small wind turbine.

    You could use 4 in series for 24V (24V volt inverters are available and generally more efficient I think, used on lorries etc.)

    Original Poster

    24v inverter will output 12v?

    Get yourself a small car alternator and car battery, stick to the basis of 12V and find small car parts create a wind turbine yourself! :w00t:
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