The Bollingstedt energy storage power station in Germany was officially put into operation in June 2025, and the opening ceremony was held in the presence of Tobias Goldschmidt, Minister of Energy Transition, Climate Protection, Environment and Nature of the state of Schleswig Holstein. This 1.2-hectare energy storage power station, with an installed power of 103.5MW and 238MWh of energy storage capacity, can meet the green electricity needs of 170000 households for up to two hours. The Bollingsstedt energy storage power station provides stable electricity security for industrial, commercial, and residential users, greatly alleviating the pressure on the power grid and filling a key gap in Germany's energy storage field, marking a solid and important step forward in Germany's energy transition.

The 64 sets of MC Cube BESS energy storage systems tailored by BYD Energy Storage for the Bollingstedt project are the key to the success of the project, and their multiple innovative technological advantages are fully utilized in the project.

Super integration improves efficiency and doubles space utilization

Traditional energy storage devices require the entire space of a football field, but the BYD energy storage MC Cube BESS system breaks this perception. The MC Cube BESS energy storage system adopts advanced CTS super integration technology, breaking through the limitations of traditional energy storage system design and efficiently integrating batteries directly into the system, greatly improving the system's space utilization rate by 98% and achieving a Vcts (cell to system volume ratio) index of over 33%. On the 1.2-hectare land of Bollingstedt power station, the maximum energy storage capacity per unit area has been achieved.

Technological innovation not only saves space, but also directly improves the cost-effectiveness of the entire lifecycle. Due to the reduction of equipment footprint, the cost of supporting land leveling and infrastructure construction has significantly decreased; The integrated design also reduces intermediate links such as cable connections and system debugging, reducing the overall construction period of the project by more than 15%. The perfect balance between system space and efficiency provides a new solution for the economic viability of large-scale energy storage projects, and also makes BYD's energy storage solutions stand out in global competition.

The safety protection works smoothly

Safety is the lifeline of energy storage systems. The blade battery equipped in BYD's energy storage MC Cube BESS system can achieve non ignition and non explosion in rigorous tests such as needle puncture, effectively eliminating the risk of thermal runaway from the root. The system adopts a modular compartment design, which separates the battery, electrical, and fire function modules independently, effectively avoiding the spread of faults. Cluster level security protection technology monitors the real-time operation status of battery clusters and implements fault warning at the cell level; The intelligent liquid cooling temperature control management system precisely regulates the temperature difference of the system, ensuring that the battery is always in the best working condition, extending the battery's service life, and ensuring the safe and stable operation of the energy storage system in Germany's complex and changing climate and electricity environment.

Intelligent operation and maintenance online management saves time and effort

The MC Cube BESS energy storage system is equipped with an advanced intelligent management platform that integrates IoT, big data, and artificial intelligence technologies to achieve full process, all-round monitoring, and intelligent operation and maintenance of the energy storage system. Management personnel can obtain real-time system operation data through the platform, including key information such as battery status, charging and discharging power, temperature, etc., and use data analysis to predict potential failures, carry out maintenance in advance, and significantly reduce operation and maintenance costs and failure rates. At Bollingstedt energy storage power station, the intelligent management platform can automatically optimize the charging and discharging strategies of the energy storage system based on real-time grid demand, achieve precise allocation of power resources, further improve energy utilization efficiency, and provide intelligent and efficient support for the stable operation of the German power grid.

After the Bollingstedt energy storage power station was put into operation, the economic benefits quickly emerged. During the peak electricity price period on December 12th, we saved customers 36 euros per megawatt hour in electricity bills. The developer based in Kirchheim, Munich, has made it clear that after deducting the previous night's charging costs, the German economy can save about 1 million euros in electricity bills within just one hour of the low electricity consumption period; Every year, the site can also reduce the additional fees used to fund renewable energy generation capacity in electricity bills by approximately 4 million euros. These data fully demonstrate that BYD's energy storage MC Cube BESS system not only effectively reduces customers' electricity costs, but also plays a huge role in optimizing Germany's energy structure and promoting the development of renewable energy. It enables the effective storage and rational utilization of excess wind and photovoltaic power, reduces dependence on natural gas and coal power generation, and helps Germany accelerate its transition towards clean energy goals.

The operation of Bollingsstedt's power station marks the beginning of the energy storage revolution. ”The words of Georg Gallmetzer, General Manager of EcoStor, deeply illustrate the significance of this project. BYD Energy Storage, with the excellent technology and reliable performance of the MC Cube BESS energy storage system, has successfully helped Bollingsstedt power station become a key node in Germany's energy transformation. It has achieved the goal of flexibly transferring solar power to nighttime hours, suppressing electricity price increases, and reducing traditional energy generation, allowing Germany's energy transformation to move from "single footed progress" to "balanced development".

At present, a second phase project of the same scale is being intensively constructed in Schuby, Germany. In the future, BYD Energy Storage will continue to uphold the spirit of innovation, providing strong support for more energy storage projects worldwide with leading technology, high-quality products, and comprehensive services, continuously promoting the global energy transformation process, and helping to build a cleaner, more efficient, and sustainable energy future.Editor/Cheng Liting