This publication contains the transmission system operators' forecast for solar energy volumes in quarter-hourly resolution, which is sold on the previous day's spot market of an electricity exchange via a market-coupled auction with quarter-hourly trading products for each quarter-hour of the following day.
Note 1: Before October 1, hourly products were marketed. Here, the quantity sold corresponded to the arithmetic hourly average of the forecast values rounded to one decimal place in MW.
Note 2: With the Renewable Energy Sources Act (EEG) 2023, the previously required physical horizontal load balancing between the four transmission system operators was eliminated.
Since then, each transmission system operator has been marketing only the electricity volumes generated in its own control area, which has led to shifts between the transmission system operators in terms of the electricity volumes they market since the changeover date of December 15, 2022.