Temporal profiles of electricity demand and green electricity generation in Germany using the example of 2019

One of the critical points for covering the electricity demand through renewable sources is the lack of controllability of supply due to weather conditions. This problem is highlighted by the term "cold dark doldrums", which is ultimately misleading, because demand and supply must be able to be matched at all times. This article analyses how large the gaps would have been in the example year 2019. The results provide information on the measures such as long-term storage and grid reinforcement that will also be required when expanding renewable energies.