S4 Eemshaven
Pioneering power in the north

One of the first projects of its kind in the Netherlands, S4 Energy’s Eemshaven BESS plays a key role in enabling a renewable-led power system across the Netherlands and Europe. As wind and solar capacity continue to expand, the electricity system increasingly requires long-duration flexibility to manage intermittency, congestion, and sustained imbalances. By storing renewable electricity for up to four hours and dispatching it when demand is highest, the project reduces reliance on fossil-fuelled generation and strengthens overall grid resilience.

Strategically located in Groningen, a critical hub within the Dutch energy network, the Eemshaven BESS is positioned where system need and grid impact are greatest. The project builds on the proven success of S4 Energy’s 4-hour battery system in Zeeland, demonstrating S4 Energy’s ability to scale successful concepts and deploy them in locations of high strategic value. It reflects a portfolio-led approach that anticipates future system constraints and prioritises long-duration flexibility as a core component of the energy transition.

Technically, the Eemshaven BESS represents the next generation of energy storage assets, moving beyond traditional short-duration frequency response systems. The installation combines long-duration battery storage with advanced, smart control technology, enabling more efficient use of renewable power and sustained grid support over extended periods. This capability allows the system to respond dynamically to changing grid conditions, maximising flexibility and reinforcing S4 Energy’s position at the forefront of next-generation energy storage solutions.

The Eemshaven BESS is designed, constructed, and operated in full compliance with the highest Dutch and international safety and quality standards. The project adheres fully to the PGS 37-1 guidelines for permitting and construction, ensuring a robust and well-controlled approach to the safe design, installation, and operation of all battery and electrical systems.

All battery systems deployed are IEC- and UL-certified, including UL 9540A–tested technology, providing independently verified assurance of fire and thermal safety performance. The site is supported by a comprehensive fire safety and emergency response plan, which has been reviewed and approved by the relevant fire brigade and environmental authorities. This ensures clear procedures, defined responsibilities, and coordinated response protocols under all operating conditions.

In line with Dutch legal requirements, S4 maintains fully trained BHV (bedrijfshulpverlening) personnel to provide on-site emergency response, first aid, and evacuation support. BHV certification and training are renewed annually to ensure continued readiness and compliance.

Operational safety is further reinforced through workforce standards. All on-site technicians are VCA-accredited, meeting recognised health, safety, and environmental requirements for working in operational and potentially hazardous environments. In addition, selected personnel hold NEN 3840 certification, ensuring the safe operation, inspection, and management of electrical installations. Together, these measures provide a comprehensive, multi-layered approach to safety, quality, and operational assurance.

The Eemshaven BESS was developed in close cooperation with the Province of Groningen, the municipality of Eemsdelta, and local landowners. Early and continuous engagement ensured alignment with regional spatial planning, energy policy, and environmental objectives.

Located within an established industrial energy cluster, the project integrates seamlessly into its surroundings and avoids disturbance to residents or natural habitats. By strengthening grid flexibility, the project directly supports regional wind and solar developments and contributes to local economic value through employment, operational activity, and innovation. In doing so, it reinforces the northern Netherlands’ role as a key hub in the country’s energy transition.