The world’s largest sodium-ion storage battery, with a capacity of 100 MWh, is reportedly operational in Qianjiang, Hubei Province, China.
Datang Group, a state-owned power generation company, connected the battery to the grid at the end of June.
As the world looks to move away from fossil fuels, battery-based energy storage solutions are critical when using the sun and wind as energy sources. A large-scale renewable energy plant powered by wind turbines or solar panels needs an equally large storage solution to tide over the intermittency of power generation and store it for future use.
https://interestingengineering.com/energy/worlds-largest-sodium-ion-battery-china