My thoughts as well (most of the other top-level comments got it wrong). The other important feature of this is that anyone can build a Savonius (or other) tur

My thoughts as well (most of the other top-level comments got it wrong). The other important feature of this is that anyone can build a Savonius (or other) turbine and impeller at home, meaning that there is no lower floor on cost, meaning it's one of the only scalable uses of wind power that I've seen. Free energy in the form of heat is all around us (orders of magnitude more than humanity uses currently, even considering a 20% electricity conversion efficiency). I'm in mourning that there is still no off-the-shelf supplier of Stirling engines for the world. Which is probably by design, considering how detrimental something like that would be to oil stocks hahah.