Recently there has been significant discussion about what constitutes financial success in cleantech. At a minimum, VCs want 10X returns on a few deals to get excited about a sector. The company I founded, SunEdison, and many other deals fell short of this goal, good returns, but not 10X returns. So now most cleantech funds have to go back out to investors with sub-par return results and raise a new fund – not an easy thing to do these days.