ENGIE and Flower sign long-term battery Flexibility Purchase Agreement in Germany

Cologne / Stockholm – ENGIE, a global reference in low-carbon energy and services, and energy tech company Flower Infrastructure Technologies AB (“Flower”) have signed a seven-year virtual Flexibility Purchase Agreement (“FPA”, also referred to as a virtual toll), covering 126 MW of BESS-backed flexible capacity in Germany.

The agreement, starting January 1, 2029, enables the financing, deployment and commercialization of several battery projects, including the largest BESS project in Hamburg (100 MW / 400 MWh), internally developed by Flower, and Flower’s recently acquired BESS project in Döllnitz, Saxony-Anhalt (63 MW / 257 MWh). ENGIE will secure long-term access to the flexibility of a portfolio of Flower’s battery assets, which will be integrated into its market activities.

Battery storage (“BESS”) plays a key role in balancing supply and demand by storing electricity when supply exceeds demand and releasing it when needed. Through its use across wholesale and ancillary services markets, it contributes to grid stability and supports the integration of renewable energy in Germany.

By combining Flower’s asset portfolio and optimisation technology with ENGIE’s advanced risk management and structuring expertise, market and operational risks can be effectively managed, making battery energy storage systems bankable and scalable. 

“This agreement with Flower illustrates how long-term partnerships can support the scaling of battery storage and reinforce flexibility in the energy system,” said Katrin Fuhrmann, Managing Director of ENGIE Supply and Energy Management activities in Germany. “By combining our expertise, we strengthen our ability to deliver reliable and competitive flexibility solutions to our customers, supporting them in managing price volatility and integrating renewable energy.”

“This is a significant milestone, not only for Flower and ENGIE, but for Europe’s path to affordable, reliable and clean energy,” says John Diklev, Founder and CEO of Flower. “To accelerate the energy transition, Europe needs scalable, long-term flexibility agreements that support investment in battery storage. These structures are essential for unlocking the capital required to build tomorrow’s flexibility infrastructure. We are proud to be driving this shift together with ENGIE.”

The agreement also represents a new commercial model for Flower, combining long-term partnerships with continued growth of its asset portfolio in Europe. 

Both companies intend to explore further collaboration opportunities as flexibility markets continue to evolve across Europe.