Grid Tied Windtura 750

Discussion in 'Windtura Generators' started by windyguru, Jun 1, 2012.

  1. windyguru

    windyguru WindyNation Expert

    Here are two pictures that a customer sent us of his Windtura 750 Grid Tied using a SunG GTI. The customer asked not to be identified by name or location.

    The first picture is of his Windtura 750 mounted in the air. I am approximating the tower height to be about 40 feet.

    The second picture is of the amps being fed into the grid from the SunG/Windtura 750. The outlet looks like a 220VAC residential outlet which means the Windtura 750 is feeding about 625 Watts (220V x 2.84A = 625W) into the grid in this picture! I have no idea what the wind speed was when the picture was taken.

    Windtura 750.jpg

    Windtura 750 GTI.jpg
  2. timber

    timber WindyNation Engineer

    Looking good!
    I wonder how anchoring the guys to the roof is working out.
    Kind of nice to not have guys obstructing anything like that.
  3. windyguru

    windyguru WindyNation Expert

    Hi Dave,

    Good question! The customer actually sent us lots of pictures and a write-up of his installation. We are going to turn this information into an article so I did not show everything in my post. Below are some pics and a description of his guy wires:

    Picture #1: The customer added extra supports to the trusses in his garage to handle the load of the guy wires.

    Picture #2: A guy wire, turnbuckle and islet assembly bolted to the garage roof. I assume the customer is using lag bolts to attach the guy wire to a 4x6 like the one shown in picture #1.

    Picture #3: One of the guy wires is attached to a steel semi trailer which the customer uses for storage. He says the total weight of this trailer is 4 tons!

    The customer says he had an extremely windy spring and that the tower and the Windtura 750 both handled it very well.

    And yes, the customer did say in his write-up that "no wires are in the way of ground traffic which was my ultimate goal."

    truss support.jpg

    guy wire attachment.jpg

    guy wire on 4 ton storage locker.jpg

    Attached Files:

  4. timber

    timber WindyNation Engineer

    Looks like they have everything well under control.
    Tower appears to be above the turbulence zone, Impressive output shows they've done their homework.
    Fun to see something a little different, glad you shared this.
  5. why not hit the watt button on the kill-a-watt i wana see this 625
  6. windyguru

    windyguru WindyNation Expert

    How about 800 plus Watts? Murray did this with the Windtura 500 and the Windtura 750 makes even more power!

    Jon, here are two simple things to do to increase the power of your system.

    1. Increase your wire gauge to the appropriate size

    2. Increase your tower height. A 30% increase in tower height (~10 feet) will result in a dramatic increase in power. Also make sure your tower and guy wires are nice and stiff. If the tower vibrates, it is not only dangerous, it will also slow the blades down.

    You should see about 1000 Watts from the Windtura 750 in 28 mph wind with a GTI if all is hooked up correctly.
  7. Im using 12 awg wire from the turbine and its rated at 25 amps then there's 3 wires so 25 amps x 3=75 amps and lets say its doing 25 volts so 25 volts x 75 amps=1875 watts this is not enough capacity for the windtura 750?
  8. Minnesota

    Minnesota WindyNation Engineer

    12 awg is too small. Current needs to flow in a loop, so for instance in a DC setup at 25 amps, the same 25 amps flows in the + and the - runs. If you add a 3rd conductor the total gain is only 50% over a single wire, not triple as you suggest. Also heat increases wire resistance, so the higher the resistance the more power will be lost in the cable. This is why using 3-wire extension cords are bad for turbines - the heat in the wires has no where to go so they keep heating up, causing more losses. Single wires in a conduit is best.

    Here is a video and a free excel spreadsheet downlaod that can help supplement the Windy Nation article windyguru mentioned.
  9. just talked to landlord about this and he gave me a 100ft of 10/3 wire (thank you Buddha) thinking ill double it up being that i only need 50 ft what do you think about that? Thanks for the help!
  10. windyguru

    windyguru WindyNation Expert

    If you double that up, that will be more than enough! Make sure your electrical connections are good and solid.
  11. sweet thanks! wind was pumping today saw 800+ watts twice
  12. Did the customer say which specific model of SunG GTI he was using to get these results?

  13. leamywind1

    leamywind1 WindyNation Engineer

    Thats a 110 volt 20 amp outlet. KW meter of that type only works on 120 volts.
  14. leamywind1

    leamywind1 WindyNation Engineer

    Very nice set up.
  15. oh brother leamy got ya on that 1 nice catch big leamy
  16. leamywind1

    leamywind1 WindyNation Engineer

  17. which makes the power 312.5W @120v

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