New ground-breaking PPA deals signed in ScandinaviaNorwegian aluminium company Norsk Hydro has signed a long-term Power Purchase Agreement (PPA) with the Green Investment Group. With a duration of 29 years, this is the world’s longest wind power purchase agreement.The Green Investment Group (GIG) has put forward €270 million to develop the 235 MW project in the Swedish town of Överturingen. It will own 100% of the project equity.