Germany: First 15 MW Steag storage system complete


German energy provider Steag has finalized the installation of its inaugural large-scale battery system next to a power station in the town of Lünen.

The 15 MW storage system uses LG Chem lithium-ion batteries and is the first of six test projects planned for across Germany over the next 12 months. The 90 MW, €100 million project is scheduled to begin commercial operation in early 2017, with this pilot test plant poised for commercial connection later this summer.

Construction of this storage project began at the end of March, and this testing stage marks a significant milestone for what will, once complete, become one of the world’s largest storage projects. The 15 MW storage system is located across one hectare and comprises 11 containers and all associated transformers and auxiliary equipment.

Steag, which is based in Essen, will complete the remaining five storage systems over the coming months, locating each one close to its own power plants as a means of providing primary control power – essentially stabilizing network frequency during moments of short-term fluctuations in the grid. “Using the existing plant sites provides synergies in the infrastructure and therefore keeps the investment costs low,” said a Steag statement.

The power plant sites include Lünen, Herne and Duisburg-Walsum in the state of North Rhine-Westphalia, and Bexbach, Fenne and Weiher in Saarland.