Sineng Electric's 50 MW/100 MWh sodium-ion battery energy storage system (BESS) project in China's Hubei province is the first phase of a larger plan that will eventually reach 100 MW/200 MWh. The initial capacity has already been connected to the grid and can power around 12,000 households for an entire day.
why not potassium?
Sodium is lighter and more abundant?
They have a problem with the number of charging cycles. State of the art is about 500, which is obviously way to little for a project like this.