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CATL Unveils World's First 9MWh Energy Storage System at ees Europe 2025
2025-05-24 | Calvin

Revolutionary TENER Stack Delivers Unprecedented Capacity and Flexibility for Global Energy Transition
Munich, Germany - CATL has launched the TENER Stack, the world's first mass-producible 9MWh ultra-large capacity energy storage system, marking a significant advancement in energy storage technology. The breakthrough solution was unveiled today at ees Europe 2025, showcasing remarkable improvements in capacity, safety, and transport efficiency.
Meeting Global Energy Demands
Designed to address escalating energy needs across industries - from AI data centers to industrial electrification - the TENER Stack enables utilities, developers, and industrial users to maximize economic value from limited installation space.
"CATL continues to lead the energy transition with innovative solutions," stated Amanda Xu, CTO ESS & President of ESS Europe at CATL. "The TENER Stack overcomes traditional limitations in power capacity and transportation while achieving breakthroughs in space utilization and cost efficiency."
Key Technological Advancements
Unmatched Capacity and Efficiency
- 9MWh capacity per unit - sufficient to power 150 EVs or a German household for six years
- 45% improvement in volume utilization compared to standard 20-foot containers
- 50% higher energy density than conventional systems
- Compatible with both centralized and string PCS architectures
Economic Benefits
The system's space efficiency translates to substantial cost savings - an 800MWh installation requires 30% fewer containers than 6MWh systems, reducing construction costs by up to 20% and increasing land-use efficiency by 40%.
Innovative Transport Solutions
CATL's patented "two in one" design addresses global weight restrictions:
- Each half-height unit maintains sub-36-ton weight for universal compliance
- 35% reduction in specialized transport costs
- Enhanced adaptability for height-restricted routes
Enhanced Safety Features
- Advanced LFP battery chemistry for superior thermal stability
- 40% more sensitive gas detection system
- Two-hour fire resistance rating
- Compliance with IEEE693 seismic standards (withstands magnitude 9 earthquakes)
- 65dB(A) noise level ideal for urban environments
Building on Proven Technology
The TENER Stack expands CATL's successful energy storage portfolio, which includes over 1,700 global deployments across all climate zones. It follows the 2023 introduction of the TENER and TENER FLEX systems, incorporating their five-year zero degradation technology.
"The TENER Stack represents more than storage - it's a global energy accessibility solution," said Hank Zhao, CTO of ESS Europe at CATL. "With its massive capacity and compact footprint, we're pushing the boundaries of what's possible in energy density."
CATL's latest innovation reinforces its commitment to accelerating the worldwide energy transition through safe, sustainable, and space-efficient solutions.
- Next: HiTHIUM Redefines Energy Storage with Groundbreaking ∞Cell 587Ah Battery and ∞Power 6.25MWh System
- Previous: EVE Energy Showcases Cutting-Edge Storage Solutions at Solartech Indonesia 2025
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