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More InformationESN Technology Group is taking another big step towards its zero-emissions vision
Four storage containers – a topspin for the future! ESN Deutsche Tischtennis Technologie GmbH (ESN) is one of the world’s hidden champions when it comes to the development and manufacture of tailor-made rubbers for table tennis brands. Here you will find the expertise and technology needed for the ultimate table tennis experience. However, it’s not just their products that make the family business special, but also their vision: CO2 neutrality by 2030! Founder and owner Georg Nicklas launched the transformation project around six years ago. The ESN mission: Fossil and CO2-free production!
For this purpose, ESN Green Energy GmbH, or EGEN for short, was founded as a wholly owned subsidiary and has been responsible for operating its own PV park since 2022. In December 2024, four storage containers from STABL, containing a total of 22 battery storage systems with a storage capacity of 3.23 MWh, were added as a sustainable complement. They play a crucial role in efficiently storing solar energy and helping to stabilize the volatile power grid in the region.
Utilizing surplus electricity instead of shutting down
Many companies that have invested in solar or wind power plants face the challenge of optimizing the use of the energy they generate within their own operations. Surplus electricity often has to be fed into the public grid, and during peak generation times, facilities must even be throttled or completely shut down. ESN faced precisely this challenge.
“We see how often we have to shut down. That’s why we want to take advantage of atypical grid usage through controlled peak shaving, reduce our grid fees, and increase self-consumption,” explains Thomas Säger, describing the main motivation. “This way, we prevent surplus electricity from being wasted or unnecessarily fed into the grid,” Säger adds.
The right partners make the difference
With the interchangeability of battery modules, STABL’s inverter technology is truly unique. “By combining remote monitoring with interchangeable modules, we can guarantee a very high level of reliability while significantly reducing maintenance effort,” explains Markus Weiss, Project Manager at STABL Energy. This is particularly appreciated by Rene Kohl, who, as an electrical specialist at EGEN, is responsible for the ongoing operation and maintenance of the storage system: “By replacing individual battery cells, we can react quickly and swap out aging battery modules at the right time.”
Another project partner, EPC service provider Greenflash, contributed to the implementation of an intelligent energy management system for ESN. Greenflash planned, procured, and installed the transformer station, handled the low-voltage connections to the storage units, and established the medium-voltage connections to the existing transformer station of the PV ground-mounted system to make the storage energy usable. “With our GreenX1 controller and AI-based energy management, we synchronize battery storage, PV generation, on-site consumption, and electricity market prices to ensure maximum economic efficiency in complex energy systems,” explains Lennart Oklitz, Project Manager at Greenflash.
Bureaucratic hurdles are part of the process
A number of bureaucratic challenges were also overcome. Henry Malsch, Head of Facility Management, mentions in particular a detailed fire protection concept, which required the construction of appropriate fire protection walls between the individual containers. Complex building regulations and authorisation procedures for the building application also delayed the project somewhat. Nevertheless, the planning and installation of the battery storage system was realised quickly and efficiently: Less than 12 months passed from the project kick-off at the beginning of 2024 to the installation of the four containers. The storage systems are expected to be connected to the grid in spring 2025.
Thanks to STABL’s innovative and unique battery storage technology, ESN now has a solution to use its self-generated solar power independently and flexibly. The solar energy produced flows directly into and out of the four storage containers. This ensures that ESN has unrestricted access to renewable energy from its own production, paving the way for a sustainable and independent energy supply. 11:0 for ESN!
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