A new battery storage system has officially been commissioned at SIGNAL IDUNA PARK. By combining the 3.7 MW battery with the world’s most powerful PV system on a stadium roof, BVB completes the energy concept for the Dortmund stadium.
Borussia Dortmund and energy company RWE officially commissioned the new battery storage system at SIGNAL IDUNA PARK during the Bundesliga home game against Eintracht Frankfurt. This marks the completion of their joint energy concept for the stadium. Following the photovoltaic system on the roof of the “BVB FanWelt” and the completion of the world’s most powerful photovoltaic system on a stadium roof, the battery storage system is now also operational.
The battery storage system has a capacity of 3.7 megawatts and can deliver this output over a period of just over an hour. The photovoltaic system, which went into operation in December 2025, comprises 11,132 solar modules and has a capacity of more than 5 megawatts (MWp). By coupling the battery with the new PV system, the generated electricity can be used even when the sun isn’t shining. With the new photovoltaic system, BVB can cover up to 45 % of SIGNAL IDUNA PARK’s electricity needs.
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Carsten Cramer, Chairman of the Executive Board of Borussia Dortmund, said: “SIGNAL IDUNA PARK is not only our iconic home but also a central element of our comprehensive decarbonisation strategy. With the battery storage system, we are working together with RWE to complete a forward-looking energy concept that makes our solar power even more usable. We are pleased that our stadium will continue to stand for resource-efficient and innovative practices in the future.”
PV system an battery storage at SIGNAL IDUNA PARK
– Installed PV capacity: 5.009 MWp (old system: 0.924 MWp)
– The world’s most powerfull PV system on a stadium roof
– 11.132 JA Solar Fullblack modules (450 Wp per module)
– 11 Sungrow inverters
– Self-consumption rate: approx. 45 %
– Installed storage capacity: 3.7 MW
– Approx. 4.1 GWh/year in energy savings
Dr. Markus Krebber, CEO of RWE: “With the commissioning of the battery storage system, the entire system—comprising the photovoltaic system and the battery—at SIGNAL IDUNA PARK is now fully operational. The integration of both systems allows us to use the solar power generated on-site even more flexibly—even when the sun isn’t shining. The experts from BVB and RWE have breathed life and energy into our partnership through this project. This provides a solid foundation for further joint developments.”
As a premium partner and an important part of the “BVB Empowers” initiative, RWE will continue to support BVB in optimising energy management at SIGNAL IDUNA PARK as part of the six-year partnership. The goal is to further increase the stadium’s contribution to security, energy efficiency, and decarbonisation. (stadiaworld, 28.10.2026)
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