CATL Signs 2GWh Sodium-ion Energy Storage Agreement with Solarpro to Accelerate Deployment in Europe
CATL announced on July 21 that it has signed a 2GWh agreement with leading Central and Eastern European renewable energy company Solarpro for the deployment of its TENER Sodium energy storage system. The two companies plan to jointly deliver the region’s first large-scale sodium-ion battery energy storage project later this year, accelerating the commercialization of next-generation energy storage technologies across Europe.
The agreement follows CATL’s recently announced 5GWh sodium-ion energy storage partnership with Dutch energy solutions provider Alfen, highlighting the company’s rapid expansion of sodium-ion battery deployments in the European market.
The project will utilize CATL’s TENER Sodium battery energy storage system, which offers a cycle life of up to 15,000 cycles and is designed to operate reliably for 25 to 30 years. The system also delivers outstanding low-temperature performance, maintaining 92% capacity retention at -20°C, making it well suited for the harsh winter conditions commonly experienced across Central and Eastern Europe.
CATL and Solarpro first established their strategic partnership in 2024, when they deployed a 150MWh EnerC+ liquid-cooled battery energy storage system in Bulgaria. In May 2026, the companies successfully commissioned a 602MWh TENER lithium battery energy storage project, which increased Bulgaria’s total installed energy storage capacity by approximately 10%. The latest agreement extends the partnership into the commercialization of sodium-ion battery technology.
As Europe continues to expand renewable energy deployment, demand for safe, long-life and climate-resilient energy storage solutions is increasing. Sodium-ion batteries are attracting growing industry attention due to their excellent low-temperature performance, long cycle life and the use of more abundant raw materials compared with lithium-based chemistries.
The latest agreement represents another important milestone for CATL’s sodium-ion battery commercialization strategy and reflects growing market confidence in sodium-ion technology as a promising solution for future utility-scale energy storage applications.
