CATL Unveils the Largest Energy Storage Test Facility, Ushering in Real-World Validation Era

CATL Unveils World's Largest Energy Storage Test Facility

On May 28, 2026, CATL launched its Xiamen Energy Storage Validation Research Institute (ESVL), marking a pivotal moment in energy storage technology. With an expansive area of 10 hectares and an investment amounting to approximately RMB 3 billion (around 440 million USD), this facility not only stands as the largest but also the most comprehensive one-stop testing and validation venue in the industry. This significant development aims to advance energy storage into an era where real-world validation is essential.

Addressing Industry Challenges

As the demand for energy storage increases, the industry faces notable challenges. Many large-scale energy storage stations are failing to meet performance expectations, with nearly 20% underperforming and about 46.5% encountering delays in grid connections exceeding two months. Current validation processes, which primarily focus on individual components, need to evolve into a robust framework that validates entire systems at the station level.

Dr. Wu Kai, Chief Scientist of CATL, emphasized the necessity of scientific rigor, stating, "Energy storage is entering the gigawatt era, requiring a transparent approach regarding equipment performance and grid dynamics. It’s crucial to raise industry standards and validate systems before they even hit the market."

Innovative Laboratories at ESVL

The ESVL is equipped with five state-of-the-art laboratories that deliver comprehensive scenario validation:

1. Grid Integration Laboratory: This groundbreaking facility simulates real-world grid connections with a 35kV/100MVA grid simulator, larger than any comparable platform globally, enabling the testing of over 10 energy storage containers simultaneously.
2. High-Voltage Safety Laboratory: Covering high-voltage conditions from 1kV to 500kV, this lab explores fire and explosion mechanisms, guiding manufacturers in enhancing safety designs.
3. Thermal Safety and Combustion Laboratory: The world’s first large indoor combustion facility can conduct scaled explosive tests, providing crucial data for safety measures in deployment.
4. Environment Reliability Laboratory: This facility tests energy storage systems under extreme climates (-50°C to 100°C), ensuring reliability in varied environmental conditions.
5. Electromagnetic Compatibility Laboratory: With unique testing capabilities, this lab simulates real-world operation conditions, identifying electromagnetic interference risks effectively.

Supporting Global Energy Transition

ESVL is committed to transparency and reliability in energy storage, collaborating with prominent certification bodies like TÜV SÜD and TÜV Rheinland. It aims to provide traceable data that assists regulators, insurers, and financial institutions in making informed decisions regarding energy storage technologies.

CATL’s history in energy storage dates back to 2016, involving the development of 100 MWh-class lithium-ion battery storage technology. This ongoing dedication to innovation has led CATL to capture record market shares, achieving 121 GWh in battery sales in 2025 and maintaining a 30.4% global market share.

With the advent of ESVL, CATL reinforces its leading position not just as a manufacturer but also as a pivotal player shaping the future of the energy storage industry toward a more sustainable, validated, and reliable technology landscape.

This commitment reflects a new paradigm in which the energy storage sector can achieve higher standards through rigorous real-world validation, paving the way for a trustworthy and effective energy future. With this facility now in operation, the industry can look forward to enhanced performance, reliability, and safety across energy storage solutions worldwide.