Apparently I was already working on this in my fork on the bugfix/WINDENERGY-3922-error-when-no-grid-pts-intersect-aoi branch. Might want to dig that out.
I had started to look into this, but it's so long ago and what I had done was so trivial that I can't actually say that it's in progress. I've removed the label.
Mentioned on the forums: https://community.naturalcapitalproject.org/t/error-running-offshore-wind-energy-with-custom-aoi-and-custom-grid-land-points/513
Original issue: https://bitbucket.org/natcap/invest/issues/3922/wind-energy-fails-when-no-grid-points
Apparently I was already working on this in my fork on the
bugfix/WINDENERGY-3922-error-when-no-grid-pts-intersect-aoi
branch. Might want to dig that out.