Initial situation
The EGIS eG energy cooperative aims to actively promote the regional energy transition and foster a decentralized, independent and sustainable energy supply. In the municipality of Lehe in the district of Dithmarschen, a project was implemented that combines a 3.5 MWp community solar system with a large-scale battery storage system.
The project was developed in a region that is traditionally strongly characterized by wind energy. The solar park supplements and diversifies local renewable energy generation. The combination of photovoltaics and energy storage makes it possible to use locally generated energy more efficiently and feed it more flexibly into the power grid.
Implementation of the project
The solar park was implemented by MaxSolar and equipped with an INTILION | scalecube large-scale battery storage system. The storage system has a capacity of 3.6 megawatt hours and was installed as an outdoor system. The combination of photovoltaic system and energy storage system creates an integrated energy system that can absorb surplus solar power and feed it back into the grid at a later date. In mathematical terms, the solar park can cover the electricity requirements of around 1,000 four-person households.
| Large-scale storage facility in Lehe, Schleswig-Holstein. From left to right: Lars Brans (Mayor), Pascal Lang (CEO of EGIS eG), Niklas Scharfenberg (Team Leader Project Development South) and Rolf Thiede (then Mayor). Copyright: MaxSolar GmbH
Functionality and benefits
The large-scale battery storage system performs several important tasks within the local energy system.
Intermediate storage of solar power
Surplus electricity from the photovoltaic system is stored and fed back into the power grid when required. This allows renewable energy to be used more flexibly over time.
Provision of balancing energy
The storage system provides secondary control power (aFRR) and thus helps to stabilize the grid frequency.
Greater security of supply
By temporarily storing solar power, energy can also be provided when solar radiation is low or in the evening hours.
Citizen participation as part of the energy transition
A central component of the project is citizen participation. People from the region can actively participate in the energy system via cooperative shares and share in the regional added value.
The combination of solar park, battery storage and community energy shows how the energy transition can be successfully implemented at regional level.
There are still not many solar parks with battery storage in Germany. We believe in this combination. Solar power from midday can be fed into the storage system and then fed into the grid when required. This contributes to grid stability and security of supply
Pascal Lang
Chairman of the Executive Board of EGIS eG
The solar park and energy storage facility in Lehe not only sends a clear signal in favour of the regional energy transition, but also enables citizens to actively participate in this important process. By combining renewable energy generation and innovative storage technology, we are promoting decentralised and ecological energy generation.
Christoph Strasser
Managing Director of MaxSolar GmbH
Customer
MaxSolar GmbH
Traunstein, Germany
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MaxSolar is a leading provider of integrated, innovative energy solutions for companies, local authorities and landowners. Headquartered in Traunstein, the company, which was founded in 2009, now has more than 300 employees at five locations throughout Germany. MaxSolar’s range of services includes the planning, construction and operation of photovoltaic and wind systems, energy storage systems, e-charging infrastructure and heating solutions in integrated systems. The company’s current project pipeline currently comprises over 7.5 GW in various stages of development.
Final customer
EGIS eG
Neuötting, Germany
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EGIS eG is an association of many citizens, municipalities and companies within its home region, but also throughout Germany. Together with its members, it shares the conviction that the energy transition in Germany should be implemented primarily by citizens. Founded in 2013, EGIS eG now has more than 2,300 members, including all 24 towns, municipalities and markets in the district of Altötting as well as the district of Altötting itself. This makes it one of the largest energy cooperatives in Germany.