The Feldheim Regional Regulating Power Station (RRKW) – BESS is a 10,000kW energy storage project located in Feldheim, Brandenburg, Germany.

The electro-chemical battery energy storage project uses lithium-ion as its storage technology. The project was announced in 2014 and was commissioned in 2015.


The Feldheim Regional Regulating Power Station (RRKW) – BESS was developed by Energiequelle.

The key applications of the project are frequency regulation, renewable capacity firming and transmission upgrades due to wind.

Contractors involved

Energiequelle and LG Chem have delivered the battery energy storage project.

Additional information

Owner 1 – Venture Capital
Ownership Model – Third-Party-Owned
Project investment is reported to have been €12.8 million ($14.3 million). A significant proportion of that funding, €5 million, came in the form of a grant shared by Brandenburg and, encouragingly, the European Regional Development Fund (ERDF).
The principal intention of the plant is to provide load-balancing power to the local transmission grid. Load-balancing power is what’s required to balance out temporal variations in grid frequency. The plant is capable of both relieving the grid when there is an oversupply of electricity by storing surplus power, and supplying power to stabilise the grid when required.

About Energiequelle

Energiequelle GmbH (Energiequelle) is a renewable energy company that provides turnkey system services to wind, biogas, and solar energy projects. Its offerings include planning and construction services: identification of project site, negotiation, and construction of project; and grid connection services. Energiequelle also provides management services: technical and commercial management, and administration of systems for generation, storage and distribution of renewable energy. The company serves in Germany, Spain, Italy, and France. Energiequelle is headquartered in Zossen, Brandenburg, Germany.


All publicly-announced energy storage projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects are sourced through secondary information sources such as country specific power players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.