Steag inaugurates US$100 million largest-of-its-kind energy storage system

LinkedIn
Twitter
Reddit
Facebook
Email

Credit: Steag
Major German utility Steag and automation company Nidec ASI, formerly known as Ansaldo Sistemi Industriali, have inaugurated a 90MW energy storage system in Germany, in what is the largest installation of its kind.

The project consists of six 15MW Nidec ASI storage systems that aid Steag in the stabilisation of the country’s grid via frequency regulation and voltage control.

Germany’s largest battery system was celebrated in an inauguration ceremony held in Duisburg-Walsum, attended by North-Rhine Westphalia minister of Economic Affairs Garrelt Duin and Saarland’s Minister President Annegret-Kramp-Karrenbauer. During the ceremony, the select systems were officially put into operation at the Weiher power plant.

This monumental project has been a long time in the making, with Steag commissioning Nidec in November 2015 to supply and install the systems that use Korea’s LG Chem batteries. The project, that reportedly cost around US$100 million, broke ground last May and subsequently installed six energy storage systems at different sites including Weiher, Bexbach and Fenne.

This article requires Premium SubscriptionBasic (FREE) Subscription

Enjoy 12 months of exclusive analysis

Not ready to commit yet?
  • Regular insight and analysis of the industry’s biggest developments
  • In-depth interviews with the industry’s leading figures
  • Annual digital subscription to the PV Tech Power journal
  • Discounts on Solar Media’s portfolio of events, in-person and virtual

Or continue reading this article for free

Six lithium-ion battery-based systems were deployed in North-Rhine Westphalia, in the northwest of the country and in Saarland, in the south, three in each region.

“The battery storage system makes an important contribution to the energy turnaround,” said Duin at the ceremony. “On the one hand, it stabilizes the power grid and increases supply security; on the other hand, emissions are reduced by saving fossil fuels. In the current energy environment with a high dynamics of change, we welcome the investments made by STEAG, especially in view of the fact that the project is implemented without subsidies. It shows that good ideas can be developed to market quickly with decisive action “.

“The grid stability and security of supply inherent are currently the most important criteria for the success of the energy transition,” commented Joachim Rumstadt, CEO of Steag. “Due to the ever-increasing share of volatile electricity from renewable energies, the electricity network is becoming increasingly stressed. I am proud that the large battery system is not only a technological pioneer, but that our investment has also been fully implemented on the market, without public funding. “

11 November 2025
San Diego, USA
The 2024 Summit included innovative new features including a ‘Crash Course in Battery Asset Management’, Ask-Me-Anything formats and debate-style sessions. You can expect to meet and network with all the key industry players again in 2025 from major US asset owners, operators, RTOs and ISOs, optimizers, software and analytics providers, technical consultancies, O&M technology providers and more.

Read Next

September 4, 2025
In a double-hit of Texas news, Ormat is commencing operations at its Lower Rio facility, Engie is partnering with Prometheus Hyperscale to power data centres.
September 4, 2025
Australian battery storage developer Akaysha Energy has secured an AU$300 million (US$196 million) corporate debt facility to accelerate its growing portfolio of utility-scale battery energy storage system (BESS) projects across Australia and global markets.
September 3, 2025
During the morning of 30 August 2025, the California Department of Forestry and Fire Protection (CAL FIRE) responded to a possible vegetation fire in the area of independent power producer (IPP) Arevon Energy’s California Flats solar-plus-storage project.
September 3, 2025
910MWh of BESS in Queensland, Australia, has been added to AEMO’s Market Management System, signalling readiness for commissioning.
September 2, 2025
Energy-Storage.news speaks with Karina Hershberg, Associate Principal at engineering firm PAE Engineers, on integrating microgrids with sustainable building design.

Most Popular

Email Newsletter