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Partnership as Part of the Maturity Assessment Process: green flexibility Takes Over Kajoni’s 750 MW BESS Project Portfolio

Sep 8
2 min read

In a transaction advised by GreenCap Partners, green flexibility has acquired a 750 MW BESS project portfolio developed by Kajoni, with a total storage capacity of 3 GWh. Kajoni will continue to develop the projects for green flexibility through to construction readiness.


June 30, 2026 | Osnabrück/Kempten


green flexibility has acquired a portfolio of utility-scale battery storage projects developed by Kajoni. The portfolio comprises approximately 750 MW of capacity and around 3 GWh of storage capacity. The projects are participating in the current round of Germany’s maturity assessment process for connections to the extra-high-voltage grid.


Participation in the maturity assessment process already involves significant financial commitments before a potential grid connection approval is granted, including processing fees, security deposits and other project-related capital requirements.

As a financially strong partner, green flexibility is enabling the projects to participate in the maturity assessment process through its investment. Following a potential grid connection approval by the transmission system operator, Kajoni will continue developing the projects through to Ready-to-Build (RTB) status. green flexibility will then take over responsibility for project execution, operations and commercialisation.


“We are very pleased about our partnership with Kajoni, who have done an excellent job preparing the pipeline for the maturity assessment process. We would also like to thank GreenCap for a fast and highly professional process. Complementing our own project development activities, the acquired portfolio enables us to bring additional utility-scale battery storage projects into the process. We are looking forward to the results,” says Simon Wisseler, Director M&A at green flexibility.

With this transaction, green flexibility further strengthens its position as a long-term investor, developer and operator of utility-scale battery storage systems in Germany. The company’s goal is not only to develop storage projects, but to bring them through to commissioning and into long-term operation.

In the long term, these projects are expected to make an important contribution to integrating renewable energy, increasing flexibility in the power system and making more efficient use of existing grid capacity.


“We are very pleased about our partnership with green flexibility. Throughout the highly time-sensitive negotiations, the team demonstrated great pragmatism and fairness. We look forward to a successful collaboration and would like to thank GreenCap for conducting a competitive process in a timely manner,” says Manuel Stiller, Managing Director of Kajoni.

The transaction highlights the increasing professionalisation of the utility-scale battery storage market. As competition for grid connections intensifies, projects that are not only technically and regulatorily prepared, but also backed by a strong investor and a clear path to execution, are becoming increasingly important.

 

 


 
 
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