This article is a reprint from T. Stetz, J. von Appen, F. Niedermeyer, G. Scheibner, R. Sikora and M. Braun, "Twilight of the Grids: The Impact Distributed Solar on Germany’s Energy Transition," in IEEE Power Magazine, vol. 13, no. 2, pp. 50-61, March-April 2015, doi: 10.1109/MPE.2014.2379971. Please access original Xplore.