On December 29, Guangdong Huadian Shanwei Overseas Chinese Management District New Electrochemical Energy Storage Power Station-the National Energy Administration (NEA)'s first 100MW-class large-capacity semi-solid lithium-ion battery energy storage system, EPC contracted by GEDI was successfully connected to the grid.

The project is located in the Overseas Chinese Management District of Shanwei City, Guangdong Province. It is recognized as a NEA pilot demonstration project for new energy storage, a first-of-a-kind major energy technology equipment project under the fifth batch, and a technological innovation research guide project for novel power systems. The project involves constructing a 200 MW/400 MWh new electrochemical energy storage power station and a 220 kV transmission line. Guangdong Teway Energy Storage Technology Co., Ltd., a subsidiary of GEDI, played a pivotal role in equipment R&D and delivered a critical hybrid energy storage solution combining semi-solid lithium batteries with sodium batteries. The company supplied a total of 55 MW/110 MWh flexible energy storage system for the project.

As a key offshore wind power landing point for the eastern Guangdong power grid, this project adopts an industry-leading high-voltage cascaded large-capacity hybrid energy storage technology combining semi-solid lithium-ion and sodium-ion batteries. It features rapid response, precise regulation, and exceptional safety and reliability. Upon completion, it will serve as critical infrastructure to enhance grid resilience and regulatory flexibility, providing robust peaking support for the regional grid. This will significantly boost power supply capacity, promote efficient integration of renewable energy, and contribute to Guangdong's energy structure optimization and the achievement of its dual carbon goals.