The law for the expansion of renewable energies presents entirely new challenges for lawyers, associations, plant operators and manufacturers, municipalities, and ultimately the economy, with the legislative compromise formula of a harmonized expansion. The new EEG hand commentary focuses from a consulting perspective on the complicated new regulations and already incorporates the first court decisions following the EEG amendment. It clearly prepares typical practical problem situations: Are there transitional regulations? What rules apply to existing plants? How does the previous case law and the decisions of the EEG Clearing House stand? How will the funding costs be distributed in the future? When will self-supply still be privileged? Which plant operators must market their electricity directly and from when?.