The build-out of battery storage in Germany reached a new record in the first half of 2026, according to an analysis of the federal Marktstammdatenregister by the Internationales Wirtschaftsforum Regenerative Energien (IWR). The Münster-based research body said the storage market is now expanding faster than the federal government’s current energy policy assumes.
The figures point to continued acceleration rather than a one-off spike. IWR noted a widening gap between the pace of deployment on the ground and the framework set out in Berlin’s energy strategy, a mismatch that could shape upcoming policy debates on grid fees, market rules and storage incentives.
Recent commercial activity underlines the trend. EnBW secured 1.2 GWh of capacity in an Italian four-hour large-scale storage project through a tolling deal, while developer Ylektra is building a 50 MW agri-PV project paired with storage in Rheinhessen. Rheinenergie and SMA Altenso have connected their first joint large-scale battery, and Eku Energy has entered the German market with four-hour systems — a sign of the shift towards longer-duration storage.
The momentum is not confined to Europe. IWR also flagged construction of what is set to be the world’s largest battery storage facility in Abu Dhabi, with BYD supplying 11.3 GWh for the project.
For the Baltic Sea region, Germany’s storage expansion matters directly. As offshore wind capacity grows across the southern Baltic, batteries and other flexible assets are central to absorbing variable generation and stabilising cross-border power flows.
