In 2021, the Grohnde nuclear power plant in Lower Saxony on the Weser River was shut down. Now, immediately next to it, the Emmerthal energy cluster is growing with three very large battery storage systems, ground-mounted photovoltaic systems, and a new substation for several 380-kilovolt high-voltage lines.
Heat storage is much simpler and cheaper than electricity storage.
Both are needed, but storing electricity when all you need is heat is overkill, and unnecessary expensive.