NIESTETAL, Germany, Aug 28, 2025 – SMA Altenso and MEAG have signed an agreement to build a second grid-scale battery energy storage system (BESS) in Germany to support renewable energy integration. After completing the Metelen project, SMA Altenso will deliver a 130-MW, 354-MWh battery facility in Hoexter, also in North Rhine-Westphalia.
“Battery energy storage systems are essential for bridging supply gaps during periods of low renewable generation and in facilitating the greater integration of renewable energy into the grid. With the projects in Hoexter and Metelen, we are laying the foundation for our battery storage platform in Europe.” said Dominik Damaschke, head of Illiquid Assets Equity at MEAG.
The Hoexter battery storage system will be one of the first large-scale projects in Germany to use SMA Sunny Central Storage UP-S inverters with silicon carbide (SiC) MOSFET* technology. These battery inverters improve energy conversion efficiency, reduce noise levels, and extend operational life. Two SMA power plant managers will act as central control units, handling grid integration and monitoring. Altenso will oversee the system’s development, construction, and maintenance. The grid connection for the Hoexter BESS is scheduled for 2027.
“This BESS project represents a key step in developing urgently needed energy storage solutions and highlights the importance of strong partnerships.,” said Alessandro Materozzi, head of project development at Altenso. “We are proud to be working with MEAG once again to help shape a resilient and sustainable energy future for Germany.”
*SiC MOSFET = Silicon Carbide Metal-oxide-Semiconductor Field-effect Transistor
Source: SMA Altenso
About SMA Altenso
SMA Altenso GmbH, a wholly owned subsidiary of SMA Solar Technology AG, is based on SMA’s campus in Niestetal, Germany. It provides engineering and system integration solutions for battery energy storage systems, hydrogen power-to-gas applications, and PV-hybrid and off-grid energy systems. SMA Altenso serves industries including renewable energy infrastructure, remote off-grid sites, island electrification, and large-scale storage and hydrogen projects. The company reports estimated annual revenue of about $24.4M and employs roughly 100 to 110 people, drawing on more than 30 years of SMA’s expertise in power conversion.