SunG Voltage

Discussion in 'Connecting to the Grid' started by SBecker600, Jan 19, 2012.

  1. Ok so i have been watching this forum for a while though this is my first post. I have a windtura 750 with 5 grabber blades and a SunG 300 10.8-30 parallel with a 1000 22-60. My first question is do you guys feel the 10.8-30 locks the turbine down too much in bigger winds causing the turbine to not reach its potential. it seems to take lots of wind to get it to bump past the lower voltage inverter. I unplug the 10.8-30 and go 22-60 only and i am seeing more 0000 on output but much higher numbers when the turbine is making power. My second question is did anyone add weight to thier tail when upgrading to 5 blades it seems to furl at a lower speed ? Thanks.........
  2. Wow No response.............................
  3. windyguru

    windyguru WindyNation Expert


    I thought one of the guys with a SunG GTI would respond. I will do my best considering I have not tested the SunG's myself. I would say that the 10.8-30 is going to lock the turbine down and, as a consequence, make less power than the 22-60 SunG. This is just a fact of life and something you and your turbine will have to live with. There are lots of Watts in this voltage range and it would be very foolish not to harvest them.

    There are two main reasons why your turbine is making more power with the 22-60 SunG. The first reason is obvious. When the turbine is feeding into the 22-60 GTI, there is a high wind condition (compared to when the 10.8-30 GTI is operating). Thus, there is more power available in the wind and the wind turbine makes more power. The second reason is that in the 22-60 volt region the turbine is making more volts and less amps (compared to the 10.8-30 volt region). Volts travel through copper wire easier than amps. Less amps and more volts means that more of the power is making its way to the GTI and the grid:

    So, yes the 10.8-30 volt is probably less efficient than the 22-60 but it is WAY better than nothing. Nothing that operates at a variable speed (like a wind turbine) can always operate at is best efficiency.

    To address the furling of the five blades. Without going into a long winded explanation of why it furls sooner, I will say yes it furls at a lower wind speed. And yes, you can add some weight to the tail to make it furl at a higher wind speed. We optimized the Complete Windtura 750 Wind Turbine to work optimally with three blades.
  4. Thanks
    How is the weight figured to add. Weight difference between 3 to 5blades and hub and just add to tail ?
  5. leamywind1

    leamywind1 WindyNation Engineer

    Guru, well explained and the answers are on this fourm. I also have a possible solution to using the two inverters under "wind speed relays" using my three 24v wind max's.
    Hope his helps
  6. windyguru

    windyguru WindyNation Expert

    Try adding one pound at the end of the vane. Do not bolt any wait to the aluminum tail of the Y-bracket. The extra weight could, over time, metal fatigue the Y-bracket.
  7. Will these SunG inverters with a 120v./230v. switch actually work on a three wire 230v. (two hot 120v. and a neutral) American system, or are they meant to work on a European 230v. system?
  8. TomT

    TomT WindyNation Engineer

    Should work for either system. Here is some specs I found on them.

    Minnesota likes this.

Share This Page