Power Day and Night: Reliable supply in Priestewitz – Germany

The 3.7 MWh storage system with a capacity of 3.78 MVA in Priestewitz, Saxony, stores electricity during the day and feeds it into the grid when needed. This is the first large-scale storage system connected to the grid in Saxony, as part of the innovation tender by the German Federal Network Agency (BNetzA). At the inauguration ceremony in March 2023, Saxony’s Minister President Michael Kretschmer and the Mayor of Priestewitz, Manuela Gajewi, emphasized the importance of the green power plant for Saxony and the local community. 

Without energy storage: A look at the initial situation

INTILION won and successfully implemented the Priestewitz project as part of the innovation tender of the Federal Network Agency. The innovation tender was launched to push the integration of renewable energies into the German power grid. The Federal Network Agency’s innovation tender supports innovative projects that contribute to the modernization of the German power grid. The aim is to successfully implement the energy transition and to prepare the grid for the future. The tender is aimed at companies, research institutions, and start-ups that want to develop and implement innovative solutions for the field of renewable energies. The goal of the Priestewitz-Project was to improve network stability and security by storing excess energy from renewable sources and feeding it back into the grid when needed.  


PV Plant


3,7 MVA


3,7 MWh


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INTILION Energy Storage: The customized solution

The storage system has a capacity of 3.7 MWh and is housed in a 40-foot container. With a power output of 3.7 MVA, the storage system can store and emit a significant amount of electricity. The purpose of the battery storage system is to provide grid operators with automatic Frequency Restoration Reserves (aFRR), which is a type of regulating energy to keep the frequency in the power grid stable. The battery storage system can quickly respond to changes in the grid frequency and help stabilize the power grid. INTILION not only delivered the energy storage system, but also the inverter and transformer as part of the Priestewitz project. In addition, we took on the system design, project management, on-site installation and commissioning on the open field from the outset. Our team also developed a tailored service concept to ensure a smooth operation of the energy system. 

1x INTILION | scalecube

Total capacity: 3,7 MWh

Energy Connects: Strong partnerships are key to success

Since the beginning of this project, we have maintained a strong customer relationship with Qair Deutschland and Leipziger Stadtwerke. The project managers of all involved companies have worked closely with their teams and trades to successfully realize the project. The joint handling of challenges such as a flood, which temporarily delayed the project, was particularly remarkable. We look forward to further joint projects!  

"We are pleased to have INTILION as a competent partner with great expertise on our side, who has fulfilled the requirements of the innovation tender 100% and also solves problems within a very short time." 

Frank Polhaus
Head of PV and Storage
© Leipziger Gruppe
© M.W. Media Arts
© Leipziger Gruppe
© Leipziger Gruppe


Project Consortium founded by Qair Deutschland GmbH, München, and Stadtwerke Leipzig GmbH, Leipzig

München/Leipzig, Germany

The Qair Group is an independent energy producer that produces only renewable energy in 23 countries worldwide. With more than 30 years of experience, Qair develops, finances, builds, and operates solar, onshore and offshore wind, hydropower, and green hydrogen projects. Our team accompanies these projects throughout their entire life cycle – from site analysis to repowering – and thus makes a valuable contribution to the transition to responsible energy. Qair Germany is successfully positioned as a project developer, asset manager, and operator. In 2022, the Qair Group acquired the team of Qair Germany as part of a larger transaction. We have decades of experience in the renewable energy sector and now sail under a new flag in a very exciting environment – we consider ourselves a part of the energy transition. 

The Leipziger Stadtwerke, as the market leader for electricity and heat in Leipzig, reliably and efficiently supply the people of Leipzig and the surrounding region with energy and actively shape the energy transition on a local level. The Leipziger Stadtwerke is a subsidiary of the Leipziger Gruppe and consistently pursues the goal of intelligently combining renewable, innovative, and conventional technologies, as well as ensuring an ecological and economic supply of energy to the people in the region. This also includes the further expansion of renewable energy generation facilities. 


PV Plant Priestewitz

Priestewitz, Germany