Germany faces a flood of battery projects whose capacity far exceeds grid needs

After years of renewable energy development, short-term storage is also beginning to attract greater attention, primarily in the form of battery storage. In neighboring Germany, distribution system operators are facing a surge in new battery storage projects. According to data published by German grid regulator Bundesnetzagentur, their combined capacity is several times greater than the grid’s peak load. Many of the projects are therefore likely speculative, and it is far from certain how many will ultimately be built.

As installed capacity from intermittent renewables—primarily solar and wind power plants—increases and conventional generation capacity gradually declines, the need for storage assets in the grid is also growing. In addition to storing renewable energy when conditions are favorable and using it later, battery storage systems can help stabilize the grid by providing ancillary services. Among other things, they can also help balance price differences throughout the day.

German grid regulator Bundesnetzagentur recently published data on the total volume of projects that have applied for grid connections. According to the regulator, German distribution system operators received more than 10,000 applications last year to connect battery storage systems at high voltage. These projects do not include storage systems at low voltage, primarily those installed in households.

The project pipeline is enormous, as is the uncertainty over completion

The total installed capacity of the registered projects at high voltage was around 400 GW, with storage capacity of approximately 661 GWh. For comparison, peak load on the German grid in recent years has been around 60 GW in summer and 70 to 75 GW in winter. The volume of projects therefore exceeds current needs several times over, and many of them are unlikely to be built at all.

According to the regulator, distribution companies processed approximately 3,800 applications last year, including applications from both 2024 and previous years. These storage systems represent around 25 GW of installed capacity and 46 GWh of storage capacity. However, the regulator says that the permits issued are binding only on the system operators, so not all of these projects necessarily have to be completed.