The head of the leading rooftop solar company in the U.S. told me last year that one of his top priorities was to strike deals with electric utilities that would make them partners rather than rivals in the changing power sector.

“I’m very interested in finding a utility that we can work with that wants to solve problems, not prevent change,” Lyndon Rive, the co-founder and chief executive of SolarCity, said in June. “It would be learning for both of us.”

Well, Rive got his wish last week as SolarCity and two other solar developers, SunPower and SunEdison, joined six New York utilities in announcing their formation of the “Solar Progress Partnership.” (Read more)