The partnership
enspired is supporting Schoenergie, a German developer of sustainable energy infrastructure, as a strategic partner for the cross-market optimization of their co-located BESS in Föhren, Germany, to unlock the full commercial and system value of the 21 MW/55 MWh project.
Header and photo rights: Schoenergie
The customer
Schoenergie is a family-owned renewable energy company based in Germany, developing integrated solutions across solar power, battery storage, and intelligent energy management. Founded in 2008 with a focus on combining sustainable energy generation with smart technology, the company has delivered more than 5,000 projects for households, enterprises, and utility-scale applications. Schoenergie's philosophy is deeply rooted in the conviction that photovoltaic power is the solution to achieving economic viability while creating a sustainable environment for people and wildlife.
The use case
The battery park in Föhren is co-located with a solar park in the neighboring town of Schweich, both situated in the state of Rhineland-Palatinate (Rheinland-Pfalz) in Western Germany and operated in Amprion's grid zone via a 20 kV medium-voltage interface. One of the first grid-forming battery systems in a continental European distribution grid, it consists of 11 storage containers with a total capacity of 21 MW and 55 MWh. Each unit contains 48 modules and 4,992 lithium iron phosphate (LFP) cells.
Header and photo rights: Schoenergie
enspired has been optimizing this BESS (battery energy storage system) since October 2025, strategically allocating capacity across the wholesale market (day-ahead, intraday), ancillary services (FCR, aFRR energy, aFRR capacity), and intraday continuous trading to maximize revenues. "We are proud to optimize such a meaningful, grid-forming project and specifically designed our optimization strategy for the battery's co-located setup," says Jürgen Pfalzer, enspired's Chief Commercial Officer. "Schoenergie did a great job in closely involving the local community and creating awareness about how PVs and BESS work in practice, contribute to supply security, and accelerate the energy transition."
Header and photo credit: Schoenergie
The battery containers were manufactured by HiTHIUM and have SMA grid-forming inverters at their core, forming a unique system that can act as an emergency grid through its black-start capability. In the event of a large-scale power outage, the storage system can work with the nearby substation to restart regional power supply for roughly 5,500 connected households. Beyond its commercial and grid-stabilizing activities, the battery is part of the SUREVIVE research project, which investigates how storage assets can provide instantaneous reserves in the future – a function traditionally performed by conventional power plants.
Header and photo credit: Schoenergie
The environmental edge
By combining battery technology with solar generation, this project helps integrate more clean energy into the grid while simultaneously accounting for instabilities in system frequency. Schoenergie demonstrates a masterful implementation of co-location, combining greater energy independence, community involvement, and responsible education. "This project shows that the energy transition and grid stability don't have to be mutually exclusive," comments Schoenergie CEO Gerd Schöller. "Grid-forming battery storage is the key to a secure and sustainable energy future!"
