Connecting MPPT charge controller/s to battery bank

Hi, I am building an electric vehicle with a 60v battery bank consisting of 5 deep cycle lead-acid batteries. From what I've read I should use an MPPT charge controller/s. My question is how to connect them as I don't see any that specify 60v output. Most of them are 12 or 24v. Should I buy 5 12v units and connect 1 to each battery in parallel or connect them in series or is there some other solution? :confused:

Thanks for any replies!

Sincerely, Leo Lichtveld.

Comments

  • System2System2 Posts: 6,290 admin
    Re: Connecting MPPT charge controller/s to battery bank

    I forgot to mention that I'll be using solar panels to charge the batteries; about 1200 watts of panel. I'll be making them from cells so could achieve a variety of voltages.
  • solar_davesolar_dave Solar Expert Posts: 2,389 ✭✭✭✭
    Re: Connecting MPPT charge controller/s to battery bank

    Looks like this will work on a 60 volt system, and are available from our sponsors.
    OutBack FLEXmax 60, MPPT Charge Controller, 60 amp, 12, 24, 36, 48, or 60 Volt

    To work properly the panels need to be withing the limitations spelled out tin the controller. most likely in series to produce the proper volatge.

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    http://lib.store.yahoo.net/lib/wind-sun/Flexmax.pdf

    As far as making panels, look long and hard, it is pretty hard to beat warrantied manufacturer panels at a couple bucks per watt, or the thin film ones now nearing a $1 a watt.
  • RCinFLARCinFLA Solar Expert Posts: 1,453 ✭✭✭✭
    Re: Connecting MPPT charge controller/s to battery bank

    Most MPPT controllers can be set for 12v, 24v, and some capable to 48v batteries.

    The panel Vmp voltage must be larger then the battery voltage or at least 16v per 12 volt of battery in stack. This can be accomplished by stacking panels in series.

    Connect to total series battery stack, not per battery. You want the series battery stack to get uniform charging on all batteries and doing batteries individually will likely not accomplish this.

    p.s., don't recommend making your own panels from individual cells. Buy a commercial panel. The price is good now. It is hard to make homebrew panels that will not degrade from moisture intrusion.
  • nielniel Solar Expert Posts: 10,300 ✭✭✭✭
    Re: Connecting MPPT charge controller/s to battery bank

    also note that the morningstar tristar mppt and the xantrex xw mppt60-150 also can be used with 60v battery banks.
  • System2System2 Posts: 6,290 admin
    Re: Connecting MPPT charge controller/s to battery bank

    Thanks for the answers! Is anybody aware of a more economically priced 60v MPPT charge controller? Not trying to be cheap but where I'm going that's several months wages. :D
  • nielniel Solar Expert Posts: 10,300 ✭✭✭✭
    Re: Connecting MPPT charge controller/s to battery bank

    sorry, but those controllers just aren't cheap.
  • AntronXAntronX Solar Expert Posts: 462 ✭✭
    Re: Connecting MPPT charge controller/s to battery bank
    ...Is anybody aware of a more economically priced 60v MPPT charge controller?...

    Try used ones sold on eBay: Outback MX-60 $375. Note that controller is old and probably has firmware issues.
  • System2System2 Posts: 6,290 admin
    Re: Connecting MPPT charge controller/s to battery bank

    Thanks for the replies!
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