"That simpler design could make a meaningful dent in the cost of storing electricity.

According to Peak Energy, its system cuts the lifetime cost of stored energy by an average of $70 per kilowatt-hour. That’s roughly half the total cost of a typical battery system today."

https://electrek.co/2026/03/11/sodium-ion-batteries-hit-the-midwestern-grid-in-first-of-its-kind-pilot/

Sodium-ion batteries hit the Midwestern grid in first-of-its-kind pilot

RWE and Peak Energy will pilot sodium-ion grid batteries in Wisconsin – the first deployment on the MISO grid.

Electrek