Details of the transaction were not disclosed. Element calls the 1.4 gigawatt portfolio “an unparalleled set of clean energy development opportunities for 2010 and beyond”.

Private-equity backed Element Power has quietly amassed a nearly 4 gigawatt portfolio of wind and solar assets across 25 US states in the last year, the company says.

“The acquisition of these projects from EcoEnergy augments both our greenfield development efforts and our previous acquisitions, and contributes to our portfolio of well positioned, high quality assets,” states Raimund Grube, Element president and chief operating officer for North America.

EcoEnergy,