With so many business ventures vying for a piece of the green economy pie, it’s hard for investors to know which firm will be the next SunPower and which will be the next Solyndra. AlwaysOn, a business media and social networking company in Silicon Valley, CA, has released its list of the 200 top private companies in greentech, handing top honors to the company C3, which makes software meant to track and manage energy use and emissions in commercial buildings.

Partnering with heavy-hitters such as Morgan Stanley, Hewlett-Packard and Goldman Sachs; the AlwaysOn editorial team has identified the top 200 private companies that are making big industry safer, more efficient