[Spare_account]

I can't vouch for the sources, but here is some reading material:

https://wes.copernicus.org/articles/5/1623/2020/wes-5-1623-2...

[PDF] https://wes.copernicus.org/preprints/wes-2019-105/wes-2019-1...

https://www.economist.com/science-and-technology/2020/05/14/...

[Wohlf]

Interesting, so it's not the rotation direction of any individual turbine that matters but how the wake of turbines affect others around it.