Aug 19, 2014
""Unfortunately, the nameplate capacity trumpeted in the media is a drastically misleading measure of the electricity added to the grid. While wind and solar nameplate capacity represented 84 percent of Germany’s average electric power generation of 70.4 GW, it ultimately generated only 11.9 percent of total electricity (up from 11.2 percent in 2011). There are simple reasons for that discrepancy: night, cloud, and calm. The output of wind and solar generators varies wildly with weather and the time of day; during most hours they produce a small fraction of their nameplate power—or nothing at all.""