'Just wanted to post links to some YouTube videos I've uploaded recently reflecting some recent results/testing I've been doing with my HY-Energy 1kW turbines. In a nutshell, I produced over 20 kWh in a little under two days (May 20 with close to 12 kWh and May 21 a little over 8 kWh), and recorded a peak output of 2.61 kW between the two turbines. I've described my setup in the videos so I won't repeat all of that here, but basically I'm running one of HYE's "older" 1kw turbines (probably 3-4 years old), and one of their "new" ones I bought directly from the factory in China. The "new" one has longer, redesigned blades and (I've been told) a redesigned alternator. I've never seen more than about 1.1 kW from my "older" HYE, so I assume that the "new" HYE 1kw is capable of at least 1.51 kW...further testing of just that turbine will be needed of course to confirm that. During these high-output days I kept it simple...the "old" turbine was outputting to a single SunG 1kw GTI (22-60v); the "new" turbine was outputting to 2 of these same GTIs "stacked" (paralleled) to one another. Each of the 3 GTIs had its own dump load resistor (3 ohm/1500w model bought on Ebay claimed by the producer to have been tested/matched to the SunG 1kw 22-60v inverter). I'm running the two "stacked" GTIs on the "newer" turbine because I've already managed to blow out a single one on it and I'm hoping that splitting the output between 2 GTIs might help control this beast From what I could tell of the measured output these days, little if any time was spent in over-volt/dump with either of the turbines... So no wind switches/10-30v smaller GTIs wired into the system, etc. I'm going to continue to test these options, but the question is this: at the end of the day...which approach yields the most watts? With the smaller 10-30v GTI in the system, you definitely get some watts during lower winds, but that smaller GTI loads the turbine such that it slows the 'ramping up' of the RPMs pretty significantly. Alternatively, running with no smaller GTI in the mix allows the (unloaded) blades to easily spin and get 'ramped up' pretty quickly--even in pretty modest winds--so that it takes very little additional wind to get it into the 22v 'production range' of the larger 22-60v GTI...which kicks out more watts quickly than the smaller GTI. So of course the $ million dollar question...which approach yields more watts? If there was a more precise version of the Kill-A-Watt measuring down to the watt (not just kW) you could-assuming relatively constant wind conditions--run one setup for 10 minutes, measure, and then run the other. But with measurement only down to the kW, you have measure over such a long period that you're likely getting different wind conditions that throw your results off. 'So I'll continue testing both but this continues to be a mystery... In any case, here are the video links: testing of 2 x SunG 1kw GTIs "stacked" (testing with the actual turbine; testing with bench power supply) system setup and testing on "day 2" (May 21) (a little over 8 kWh produced) "new" HYE 1kW turbine producing 1.024kW @ approx 29mph* "new HYE 1kW turbine producing 1.272kW @ approx 33mph* screenshots of my output and the wind conditions for my "20 kWh days * FYI...these readings were taken on "day 2" when the wind was much more variable than "day 1," so the readings are less predictable. The winds were very gusty and there was some change in direction which slowed the RPMs somewhat compared to "day 1" when both wind speed and direction was more constant...
