Grid scale sodium ion batteries have arrived!
The first phase of Datang Group’s 100 MW/200 MWh sodium-ion energy storage project in Qianjiang, Hubei Province, was connected to the grid.
The technology has less energy density than lithium ion (which matters little for stationary grid-scale applications) and avoids the use of critical minerals.
https://www.pv-magazine.com/2024/07/02/worlds-largest-sodium-ion-battery-goes-into-operation/