The Grängesberg mine is a Swedish iron mine located in Ludvika, Dalarna which is included in the Swedish electricity price area SE3. The mine is closed and water filled yet retains a height difference between the upper and lower reservoir that is suitable for a mine storage. 

Mine Storage has entered into an agreement with British mining company Anglesey Mining Plc together with its 49.75% owned subsidiary Grängesberg Iron AB with the objective to develop a mine storage. As such, the Grängesberg mine could become the first mine storage in the world to become operational as a 15 MW pilot. To put this into context, 15 MW can support the energy need of 35 000 households*.

Mine Storage has developed the Grängesberg mine storage project over the last year and is now planning a public consultation process that includes the municipality, county administrative board, local community, local fishery conservation associations, and other stakeholders.