The impressive overall concept for decentralized, renewable energy supply was realized jointly with businesses, private households, and municipalities. Energiequelle planned and built the components of this concept turnkey-ready and using state-of-the-art technology.

The foundation of the electricity supply is the nearby wind farm, currently consisting of 52 wind turbines. Most of the electricity is fed into the public grid, as just one turbine is sufficient to supply Feldheim’s approximately 130 residents. The heat supply is provided by a biogas plant, built in 2009 in cooperation with the agricultural cooperative. When temperatures drop below a certain threshold, a woodchip heating plant kicks in, and for short-term heat demand, a power-to-heat system is activated, powered by green electricity from the wind farm. Since 2010, a battery storage system has complemented the energy supply, balancing short-term fluctuations in the power grid.

A newly constructed distribution system linked the energy sources into a regional energy supply network. This was made possible by building a dedicated local heating network and an independent electricity grid, to which all Feldheim households were connected. To manage this, they founded an energy supply company, Feldheim Energie GmbH & Co. KG, which includes the city of Treuenbrietzen, local businesses, and Energiequelle.

Since October 2010, Feldheim has been officially energy self-sufficient, impressively demonstrating that decentralized energy transition is not just a vision but a lived reality.

Michael Raschemann, founder and managing director of Energiequelle GmbH, is grateful for the strong collaboration with all parties involved: "The openness in Feldheim, along with the willingness and curious interest to make a difference together, enabled the development here. By involving the municipality, businesses and all citizens, we can not only supply the village sustainably with clean energy but also share in the revenues."

Siegfried Kappert, a resident of Feldheim, confirms: "Politically and economically, we unknowingly took the right path back then. Today, we are proud to be part of Feldheim and to share our story." And they do share it. Not only do media outlets from around the world regularly visit Feldheim, but also politicians, school classes, university students, and other interested parties. Beyond technical development, education is a key pillar of Feldheim’s success story. The Neue Energien Forum (NEF) was established as a modern education and experience center, offering guided tours, project days, and an interactive exhibition on renewable energy. In 2024, the NEF was honored with the National Award “Education for Sustainable Development” by the German UNESCO Commission. The exhibition center welcomes more than 3,000 visitors annually.

Michael Knape, mayor of Treuenbrietzen, to which Feldheim belongs, emphasizes not only the importance of Feldheim’s educational work but also its role model function:

"Everything that happens in Feldheim is closely coordinated with all stakeholders. And it pays off. Feldheim is a true community project."

This close cooperation between citizens, the city of Treuenbrietzen, and Energiequelle, supported by funding from the state and the EU, laid the foundation for a model project that now has international appeal.

And the development continues. Many of the wind turbines are due for repowering in the coming years. Plans are also in place for a hybrid park and further development of Feldheim as a visitor center.