Macro-economic turbulenceMacro economic turbulence (interest rates, inflation) and not the company itself. Plug into the discount rate formula and it's a rude awakening. Higher project costs attack the front end of the formula and higher interest rates do the rest with future cash flows.
The Motley Fool:
Renewable energy investors are worried about interest rates because such projects often have high up-front costs during construction and then generate value over decades. So the discount rate investors use to value future cash flows can dramatically change the value of a project today. Lower rates mean higher values today, which is good for these companies.