A second major investor owned utility in the US – in the form of Duke Energy – has put its renewables arm up for sale for something in the region of $4 billion. This has been triggered by the eagerness of US based renewables firms to buy into a larger base of projects, including major European utilities and their US operations such as Engie, Iberdrola and Enel. Germany’s RWE paid $6.8 billion a month ago for the renewables arm of Consolidated Edison, at a value of 11 times its EBITDA, increasing its live renewables by 3.0 GW and adding 7 GW to its pipeline of mostly solar and battery projects. RWE in the US was almost entirely based on Wind,…