#Germany #Munich #Sodium-ion #CATL #BESS

Breaking New Ground in Energy Storage

On June 22, 2026, CATL made significant strides in energy storage technology with the official unveiling of the TENER, a cutting-edge sodium-ion energy storage system (BESS) in Munich, Germany. This system stands as the world's first sodium-ion energy storage solution validated for real-world conditions and is expected to revolutionize the commercial energy storage landscape.

A Vision for the Future

William Wu, Director of CATL's Energy Storage Technology Center, articulated the company's commitment to bolstering global energy independence while delivering long-lasting value to customers. The development of sodium-ion batteries is aimed at providing a sustainable solution that can meet the energy needs of the world's eight billion people. Wu stated that the combination of sodium and lithium is crucial for future energy storage systems, as they work in harmony to enhance efficiency and safety.

The Performance Advantage

As the demand for renewable energy sources rises, the need for reliable energy storage becomes increasingly vital. Traditional lithium-based storage systems have shown limitations, including fluctuating supply and prices. In contrast, sodium, which is abundantly available and has reserves over a thousand times that of lithium, presents an ideal alternative. It not only performs well in extreme temperatures but is also safer and more cost-effective.

Amanda Xu, CTO of ESS and President of ESS Europe at CATL, emphasized that the energy storage sector is now focused on creating long-term value rather than merely scaling operations. She highlighted that the TENER system provides unique features tailored to meet diverse project requirements. These include simplified project implementation, flexibility in energy storage duration, and lower maintenance costs, ensuring enhanced availability and operational efficiency.

Operational Excellence

The TENER system boasts a modular architecture, allowing installation configurations tailored to specific needs. With a nominal capacity exceeding 30 MWh, the system's modular design means that a facility with a capacity of 1 GWh requires only 34 units. Each module weighs approximately 42 tons, enhancing project feasibility and reconciling installation logistics.

Moreover, advancements have also been made in the sodium-ion technology's voltage regulation and battery management systems (BMS). CATL has implemented a bidirectional voltage control system that optimizes performance across various voltage ranges. The BMS was engineered to leverage the declining voltage curve of sodium chemistry, resulting in improved state-of-charge estimations. Notably, the tolerance for overcharging has been increased by 20% compared to lithium-ion batteries, adding another safety layer.

Environmental and Economic Benefits

In addition to reduced operational costs, the TENER system features remarkable energy efficiency. The design minimizes thermal effects and decreases auxiliary energy consumption from the industry average of 2% to just 1%. This enhancement can result in substantial savings for large-scale energy storage projects. Furthermore, the system operates quietly, with noise levels at only 65 decibels, alleviating community concerns and permitting installations closer to consumption sites, ultimately saving on transmission costs.

This flexibility extends beyond its structural advantages; the TENER system is compatible with both sodium and lithium-ion batteries, using the same platform dimensions. This capability allows for a seamless transition between battery technologies, providing customers with a practical solution for mitigating lithium price fluctuations.

A Decade of Development

CATL's journey into sodium-ion technology began in 2016, investing close to €1.2 billion in research and development over the past ten years. This commitment has resulted in over 1,600 patents and innovative solutions that overcame significant technical challenges. Now with robust manufacturing capabilities, CATL is set to supply tens of thousands of tons of anodic and cathodic materials, ensuring a sustainable supply chain for sodium-ion systems.

As CATL gears up to initiate the international supply of the TENER sodium-ion systems in June 2027, the stage is set for a seismic shift in energy storage. Aiming for cumulative deliveries of 1 GWh by the end of 2026, CATL is not just redefining energy storage mechanics but also pledging a more reliable and cost-effective future for global energy management.

Conclusion

The launch of the TENER sodium storage system symbolizes a new chapter for energy technologies, echoing CATL’s vision to create a dual foundation for energy infrastructure that combines the strengths of lithium and sodium. As this innovation gradually unfolds, CATL and its partners are dedicated to realizing a strategic vision that promises a more stable and sustainable energy future.