Peak Energy and RWE Americas to deploy first sodium-ion battery in MISO

Type: Partnership · Technology: Storage · Country: United States · Announced: 2026-03-12

Peak Energy and RWE Americas will deploy an $85 million, 40 MW / 160 MWh sodium-ion battery in Illinois, the first in MISO. Peak Energy provides.

Analysis

The deployment of the first 40 MW / 160 MWh sodium-ion battery in MISO, located in Illinois, represents an early-mover play into next-generation grid storage. This $85 million development, announced on 2026-03-12, positions Peak Energy and RWE Americas at the forefront of non-lithium grid solutions. The partnership leverages Peak Energy's vertical integration in sodium-ion battery manufacturing with RWE Americas' extensive operational footprint across the US, Canada, and Mexico. RWE Americas de-risks adoption of emerging storage technology through this development stage project. Peak Energy, in turn, gains a critical grid-scale deployment for its sodium-ion systems, validating their scalability and safety for grid applications. RWE Americas, already operating over 8 GW of onshore wind, solar, and battery storage capacity, diversifies its technology portfolio with this sodium-ion deployment in Illinois. As a leading developer, owner, and operator of renewable energy assets, RWE Americas gains early operational experience with a potentially cost-effective alternative to traditional lithium-ion storage. Peak Energy, a vertically integrated energy storage company focused on developing and manufacturing sodium-ion battery storage systems, secures a foundational grid-scale project. This Illinois project provides Peak Energy a crucial reference site to accelerate market penetration for its sodium-ion solutions, aiming to provide scalable storage for grid-scale applications. The 2026-03-12 announcement allows Peak Energy to showcase its sodium-ion technology within the MISO market.

Key points

Counterparties

Source article