On February 5, 2018 in Wunsiedel, Germany, Bavaria's largest battery storage system to date was dedicated by the Managing Director of Stadtwerke Wunsiedel (SWW) Marco Krasser, Secretary of State Franz Josef Pschierer, and Siemens Chief Technology Officer Roland Busch. The Siemens Siestorage system based on lithium-ion batteries has a capacity of 8.4 megawatts. It will ensure the future stability of the distributed power grid and opens up the possibility of the municipal utilities company's participation in the primary control reserve market.