Early last year I had posted a reply on a discussion on rated power charts, my response was very simple " which chart" because it was my thoughts that it all hinged on what your load was ! I was suggesting at that time the charts were in relation to 12 V and 24 V bank loads and so what happens when you start changing the loads using grid tie inverters,,,, long story short,,, over the past few years I have worked with Larry Leamy on a lot of testing and we had multi success stories using so many types of combinations with our turbines.. I was always the one who thought that if you owned a 500 and got 400 watt from it,,, to be happy about it. I was always always expecting the rated watts of a turbine to be less than advertised when put to work in real time...... BUT I must share some photos with you on readings taken from a WN 500. Everything I show you will go against theories and what should / could be possible.. 1st there has been conversations that the 5 blade would not preform as well as the 3 blade at higher winds ! I USED A 5 BLADE That you should not use a # 12 wire because the chats show that it will not carry the current ! I USED # 12 WIRE AT 120 FT *** please note I am not saying the theories are incorrect but I am saying in the world of wind energy you get what you get ! I will post a few photos just showing watt readings. ( yes we had high winds) A few more photos showing volt and watts. There will be a number of pics but that is to show the consistancy of my readings through out the day. This will be feeding into a Sun G system that Larry and I use.. A 300 10.8-30 wired with a 1000 22-60 On the photos showing volts and watts you will not see a correct relationship between watts and volts, the reason is after you have a volt reading it takes approx 2 - 3 sec for those volts to translate through the electronics of the system and show up as watts. The volts will then be recording new readings. Due to these reading being so high for a 500 turbine Larry and I spent the better part of a day working back and forth double checking all readings but at the end of the day it appears all readings were true. So after you look at these photos I can go back to my opening heading, Is a WN 500 a 500 ?,,,,,,, OR is it a 700 or an 800 or MORE ? It really appears it depends on the load and if the turbine is allowed to find its own potential. Regardless if this is what the 500 is producing you can be sure the WN 750 would be a good purchase!