... storages in the frequency containment reserve (FCR) market in Germany. FCR is used to balance very short-term variations in the electricity grid (5 Sec.-15 Min.) and is the power product with the shortest response times within all balancing and wholesale power market products in Germany. The battery storages generate / absorb energy automatically depending on grid frequency deviations, which are caused by over- or undersupply of the entire system. For more information, refer to: Link