Sign up for daily news updates from CleanTechnica on email. Or follow us on Google News! Wind energy innovators have long dreamed of harvesting wind energy from rooftops, but the going has been slow in terms of mass market adoption. That could be about to change. A US startup has come up with a business model that leverages solar industry know-how to help cut the cost of rooftop wind turbine installations, and it has caught the eye of the US Department of Energy.