On May 7, 2025, at the Battery Energy Storage Europe exhibition in Munich, Germany, Contemporary Amperex Technology Co., Limited (CATL) officially launched TENER Stack, the world’s first mass-producible 9MWh ultra-large capacity energy storage system. The solution achieves breakthroughs in system capacity, deployment flexibility, safety, and transportation efficiency, marking a new era in energy storage technology.
Breakthrough in Capacity, 20% Cost Reduction for Stations
TENER Stack is built on CATL’s high energy-density battery cells, offering zero degradation over five years. Compared with traditional 20-foot container systems, TENER Stack improves volumetric efficiency by 45% and energy density by 50%. Each unit delivers a capacity of 9MWh—enough to charge approximately 150 electric vehicles or power an average German household for six years.
This high-capacity design translates to significant cost savings. For a storage station of 800MWh, TENER Stack requires one-third fewer containers than a typical 6MWh system and improves land use efficiency by 40%, cutting overall construction costs by 20%.
Global Transport Compatibility: “Two in One” Modular Design
To meet global road weight limits of 36 tons, CATL developed a smart “Two in One” modular design. Each half-height unit remains under this limit, complying with transport regulations in 99% of global markets. The split-structure supports multiple standard transport methods, significantly reducing wait times and lowering special transportation costs by 35%.
Its low center of gravity also improves mobility in challenging terrains such as bridges or rural roads—showcasing the solution’s superior structural design.
Enhanced Safety: 2-Hour Fire Resistance & Seismic Resilience
As safety in energy storage systems becomes a growing concern, TENER Stack raises the bar with gas sensors 40% more sensitive, leading to 35% faster system suppression response. A three-layer insulation structure ensures fire resistance for up to 2 hours.
Additionally, the system meets IEEE693 seismic standards, withstanding Level 9 earthquakes and Category 5 hurricanes.
Empowering Global Clean Energy
As of November 2024, CATL’s energy storage systems had been deployed in over 1,700 projects worldwide, spanning all climate zones and operational scenarios. With TENER Stack, CATL empowers partners to accelerate energy transition through a solution that is scalable, secure, and sustainable.
Zhao Zhongsong, CTO of CATL Energy Storage Europe, stated: “We’re not just delivering a product—we’re offering a globally scalable energy solution. With ultra-high capacity, flexible deployment, and silent, safe operation, TENER Stack redefines the benchmark for the industry. And with every leap in energy density, we unlock greater value in smaller footprints.”
