Even $1.5 billion in subsidies and loan guarantees can’t save a “clean” energy company from bankruptcy. That’s the takeaway from the looming failure of SunEdison, a company that touts itself as the “largest global renewable energy development company.” Once a darling of Wall Street and the green Left because of SunEdison’s portfolio of wind and solar projects, the company’s stock is now in free fall. Furthermore, two related companies that were spun off from SunEdison — TerraForm Global and TerraForm Power — also appear to be in financial distress. On March 30, Brian Wuebbels, the CEO of both TerraForm companies,...