Michael Bergey is a renowned wind turbine manufacturer.
In addition to that, he conducts almost daily evaluations of out-of-the-box wind power concepts, including some AWE concepts, and also VAWT. He usually gives his verdict in a single word: nope: Activité | Michael Bergey | LinkedIn.
Such an assessment can be considered summary, but it must be understood that we are dealing with a wind energy expert. Noting the invariable repetition of the same flaws (primarily lack of efficiency, but also reliability and other problems) associated with the same architectures, which lead to a lack of market despite investments, he finally summed it up in a single word: nope.
It’s interesting to go through all these wind turbine designs that end in a “nope”: you eventually see what’s wrong and understand why the dominant HAWT 3-bladed design is crushing the wind power market.
When you’re well-versed in this, you realize that this “nope” saves considerable time. For example, the last presentation led to endless questions when a simple “nope” would have been enough to close the thread. Why? Simply because a Savonius wind turbine is inefficient for electricity generation, a fact that has been proven for a long time.
In this forum, @dougselsam knows wind turbines better than anyone: he’s built them and even installed a Bergey turbine. His opinion should therefore carry weight.