The world’s biggest vanadium flow battery has been successfully connected to the grid in China by Dalian Rongke Energy Storage Technology Development— following six years of planning, construction, and commissioning.
The 100MW/400MWh Redox Flow Battery Storage Demonstration Project was connected to the 220kV Chunan Line and Chuwan Line in Dalian on 24 May.
The capacity of the first-phase project cost about 1.9 billion yuan ($280 million) or 4.75 yuan/Wh ($0,75).
It will have a total capacity of 200MW/800MWh and a total investment of about 3.8 billion yuan ($517 million) when completed.
Dalian Rongke Power and National Energy Administration of China each own 50% of the project, which is located in Shahekou District, Dalian City, Liaoning Province.
The technology was supplied by Dalian Rongke Power and UniEnergy Technologies.
The project was constructed and operated by Dalian Constant Current Energy Storage Power Station. The technology used is developed by Dalian Institute of Chemical Physics, Chinese Academy of Sciences.
Long duration project
BEST first reported the news of the project in 2016, a strategic partnership between UniEnergy Technologies (UET)’s and Rongke Power.
The 800MWh vanadium flow battery (VRB) will provide peak-shaving and grid stabilisation on the Dalian peninsula in northern China.
At the time, the Rongke said the project would include ten 20MW/80MWh VFB systems, which, after full commissioning, would be able to peak-shave around 8% of Dalian’s expected load.
The battery was due to be built at Rongke Power’s new gigafactory which opened in 2016.