Help needed regarding hybrid solar wind generator sizing

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  • MasalaGuru
    Junior Member
    • Sep 2012
    • 3

    Help needed regarding hybrid solar wind generator sizing

    I am planning to design a solar-wind hybrid generator system and I am not really sure about the components sizing for the whole system. Let me give on overview what I have done so far.
    1) Total AC load: 4kwh per day
    Total DC load: 300wh per day
    Total load demand= (total AC load + inverter losses) + total DC load
    (4kwh x (100/85)) + 300wh = 5006wh (assuming the inverter has 85% efficieny)

    2) Next, i have to find the total power demand taking into account other losses ( charger losses, wiring losses and battery losses)
    (IS THIS CORRECT?? CAN I USE THE INTENDED BATTERY DOD AS THE BATTERY LOSSES??)

    3) Next to find battery capacity = 5006wh x 5= 25030 wh
    Battery Ah =25030/48 = 521Ah

    4) Generation ratio between the wind and solar generator which i set to be 1:1
    Means, solar generator will be generating = 5006/2 = 2503w
    And wind generator will be generating 2503w

    5) PV array= 2503w/3 SunHour = 834W

    6) And I am not sure about the charge controller size for this hybrid design. Can someone please help me?

    Thank you guys. Appreciate all your help alot.
  • Naptown
    Solar Fanatic
    • Feb 2011
    • 6880

    #2
    Here use this calculator
    Off grid calculator excel 97 version (2).zip
    NABCEP certified Technical Sales Professional

    [URL="http://www.solarpaneltalk.com/showthread.php?5334-Solar-Off-Grid-Battery-Design"]http://www.solarpaneltalk.com/showth...Battery-Design[/URL]

    [URL]http://www.calculator.net/voltage-drop-calculator.html[/URL] (Voltage drop Calculator among others)

    [URL="http://www.gaisma.com"]www.gaisma.com[/URL]

    Comment

    • MasalaGuru
      Junior Member
      • Sep 2012
      • 3

      #3
      That calculator is for solar system only. My problem is to design a hybrid solar and wind generation system.

      Comment

      • Naptown
        Solar Fanatic
        • Feb 2011
        • 6880

        #4
        I would stay away from wind
        Unless it blows constantly at 15 mph or more you will never get near the production from wind.
        Wind also tends to be somewhat unreliable in that it is unpredictable, high maintenance, and tends to break down much more than solar.
        Installed cost per watt runs about the same as solar. I would not use a 1-1 ratio for the wind/solar Move toward more solar. Most people who
        install wind are disappointed in the output vs cost to install.

        You would also need to provide information on your location for the solar portion and average annual wind speed where you are, preferably measured over a year with a recording anemometer at the site and elevation of where the turbine will be placed.
        NABCEP certified Technical Sales Professional

        [URL="http://www.solarpaneltalk.com/showthread.php?5334-Solar-Off-Grid-Battery-Design"]http://www.solarpaneltalk.com/showth...Battery-Design[/URL]

        [URL]http://www.calculator.net/voltage-drop-calculator.html[/URL] (Voltage drop Calculator among others)

        [URL="http://www.gaisma.com"]www.gaisma.com[/URL]

        Comment

        • Sunking
          Solar Fanatic
          • Feb 2010
          • 23301

          #5
          Ditto forget a wind generator and will fail. Pretty much a waste of money.
          MSEE, PE

          Comment

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