In English, "baseload" is all the pre-determined power. In German, only the constant part of it, while "medium load" is the pre-determined variable power. The first is typically nuclear, lignite and hydro, the second typically [hard] coal; and peak load typically gas and hydro. The issue of balancing also covers the "medium load" part, not just peak load. On the medium term, much of the "medium term" may migrate to peak load and thus gas.

_{*Lunatic*, n.
One whose delusions are out of fashion.}