SemperPower (part of Return): The largest battery in the Netherlands, supported by the Teleport
SemperPower (part of Return) launches Castor, the Netherlands’ largest BESS (30.7 MW, 62.6 MWh). The company chose the Teleport as their controller, ensuring secure, efficient monitoring and control.
On the 29th of November 2023, SemperPower (now part of Return) announcedSee press release: Return. (2023, November 29). The largest operational battery energy storage system in the Netherlands Castor is energized and ready to go. the successful activation of Castor, the largest Battery Energy Storage System (BESS) in the Netherlands.
With a power rating of 30.7 megawatts and a storage capacity of 62.6 megawatt-hours, this advanced installation in Vlissingen-Oost is a major step forward for both the development of large-scale battery systems, and balancing needs of the Dutch energy system.
The Teleport: ensuring Castor’s efficiency & security
Behind the scenes, part of the backbone of Castor’s flexibility, lies the Teleport Gateway.
With the Teleport, SemperPower can provide control and monitor the BESS, enabling optimized performance and reliability.
The technical setup ensures a robust connection between the Battery EMS, the Teleport on-site, and the IT systems of the offtakers.
Redundancies along the whole chain, including multiple Teleports at each location, act as fail-safe mechanisms to guarantee uninterrupted operation in the face of any disruptions.
Co-Founder & CEO of SemperPower
“SemperPower is very enthusiastic about Castor going live. It’s a major step for developing a cleaner energy system.
Having Withthegrid as one of our partners on this was a win. Their Teleport solution and monitoring service allows us to offer reliable and secure control to our offtakers, and monitor our batteries safely and efficiently. They have been proven to be a trustworthy and reliable partner throughout this journey.“
This collaboration aligns with SemperPower’s and Withthegrid’s shared commitment to make large-scale energy storageWant to learn more about using the Teleport for large scale batteries? Check out the following page: the Teleport for large-scale BESS. an integral part of the sustainable energy landscape, and align with TenneT's vision of the Target Grid.See: TenneT. (n.d.). Target Grid.
About SemperPower
SemperPower (now part of Return)Want to learn more? Visit Return’s website. has emerged as the market leader in developing, financing, and operating battery energy storage systems (BESS) in the Netherlands. The company’s approach enables the integration of sustainable energy, reduction of CO2 emissions, and acceleration of the energy transition.
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