Vattenfall Expands Flexibility Portfolio: Vattenfall Secures 100 MW of Storage Capacity from Large Battery System in the Netherlands

Berlin (Germany) - As the share of renewable electricity generation continues to rise, battery storage systems are increasingly moving into the spotlight of the energy transition. They stabilize the grid by providing or absorbing power at short notice, thereby supporting flexible responses to market fluctuations.

Against this backdrop, Vattenfall has signed another agreement for the use of battery storage capacity. Under the contract, the company secures 100 MW of storage power with a storage capacity of 400 MWh from the Dutch Leopard battery storage complex. The facility is being developed by Giga Storage and is expected to be available from 2028.

The contract grants Vattenfall full operational control over the allocated part of the storage system. This enables the company to more precisely balance fluctuations in its customer and renewables portfolio. According to Erik Suichies, Head of Wholesale Customers at Vattenfall, the demand for flexible capacities is steadily increasing: “Batteries can respond quickly to continuous fluctuations — they step in during shortages or store energy when supply exceeds demand. This makes them a crucial component of the future energy system.”

The Leopard storage facility is being built in Delfzijl in the north of the Netherlands and will provide a total of 300 MW of maximum power. The final investment decision has been made. Vattenfall will be able to store up to 400 megawatt-hours in the battery and charge or discharge at a maximum output of 100 MW. The contract starts on January 1, 2028.

The energy company plans to use the storage system primarily on short-term wholesale markets, where rapid responses to undersupply or oversupply are required.

For Vattenfall, this is the third contract for the procurement of flexible capacities within a few months. The company had already secured 50 MW in the Netherlands and 55 MW in Germany on a long-term basis.

Source: IWR Online, Dec 12 2025