Multiple turbines and GTI's I agree when using multiple turbines they should all be on their own systems. From what i have found with the WM's is the MPPT on the GTI's work best with one turbine however you could run them all into one GTI like a 250w 10-30vdc and then switch them to their seperate higher volatge GTI's inverters. I have experimented both ways on the low end with tieing them altogether. In the lower winds their is not a big loss with MPPT by joining a few turbines together with one inverter under 10 MPH but in the mid to high winds (12MPH and above) there is major loss if you combine all the inverters and all turbines together. So at the least each turbine should have it's own GTI at some point in the mix. (again it all depends on the PMA) High volt rules. The only question now is how long will the bearings last running them at the higher voltages since they have not been tested this way.