Germany had an installed capacity of 39,612 MW at the end of 2014. During 2014, the output varied from 29,687 MW (74.9% of capacity briefly during December) to 24 MW (0.06%). The average output was 5,868 MW (14.8% = the capacity factor). The production was 51,405.8 GWh.
Output was between 0 to 10% of capacity for 45.5% of the time (3986.75 h)
Output was in excess of 50% of capacity for 5.2% of the time (460.75 h)
A graph of wind output during 2014, does not reveal any available base load, i.e., a reliable minimum output to rely on.
During winter, solar is near zero, if panels are covered with snow and ice.
Solar is near zero, or zero, about 75% of the hours of the year.
Wind is near zero, or zero, about 40% of the hours of the year.
Solar + wind is near zero during many hours of the year.
Solar and wind are variable energy, requiring baby-sitting (i.e., providing peaking, filling-in and balancing electricity) by the traditional plants (fossil, hydro, nuclear, bio, etc.), 24/7/365, year after year.
Any missing energy, to satisfy demand at any time, must be provided by almost ALL traditional generators at least some of the time.
All generating plants must be kept in good working order, staffed, fueled, ready to go, as needed.
Those generating plants do not need wind and solar to function, but wind and solar definitely cannot function without these plants, i.e., wind and solar are supplementary, are grid-disturbing cripples, 24/7/365, i.e., similar to unsteady drunks disturbing church service.
Without the output of these generating plants, no modern economy could function.
During higher wind periods, Germany has excess energy production, which it exports to the grids of nearby countries to make its wind energy work, but that likely will become less of an option in the future, after other countries also build out THEIR wind and solar systems. See URLs.