Peak Energy, a U.S.-based company developing low-cost, giga-scale energy storage technology for the grid, today announced an agreement with RWE Americas, a leading global energy company with approximately 13 GW of operating assets in the U.S., to pilot Peak Energy's proprietary passively cooled sodium-ion grid storage battery technology.

Peak Energy, a U.S.-based company developing low-cost, giga- scale energy storage technology for the grid, today announced a multi-year phased agreement with Jupiter Power LLC (“Jupiter Power” or “Jupiter”), a leading developer and operator of utility-scale battery energy storage systems. Under the agreement, Peak Energy will supply up to 4.75GWh of its industry-leading sodium-ion battery energy storage systems (ESS) to Jupiter Power, for deployment between 2027 and 2030.

Last week in Denver, Peak hosted 47 of its customers and development partners to celebrate the power on of Peak’s product - the first passively cooled Energy Storage System in the world. With live data, a deep dive into sodium-ion chemistry, and a site visit, Peak gave guests an unfiltered look into the development of the Peak ESS, from cell to site.

Today, Peak announced the launch and shipment of its sodium-ion battery energy storage system (ESS) that delivers a patent-pending passive cooling design to dramatically reduce lifetime energy costs. Cost-competitive with state of the industry products while offering dramatically lower operating and maintenance costs, Peak Energy's product is the first ever fully passive megawatt-hour scale battery storage system, the largest sodium-ion phosphate pyrophosphate (NFPP) battery system in the world, and the first grid-scale sodium-ion storage solution ever deployed to the U.S. electric grid. Deploying the system in a shared pilot with nine leading utility and independent power producer (IPP) customers this summer, Peak Energy is fast-tracking its promise to onshore battery manufacturing.

Peak Energy is proud to announce the successful closure of a $55 million funding round aimed at accelerating the development and commercialization of our sodium-ion battery technology. This investment underscores the growing interest in alternative energy storage solutions that can complement or replace traditional lithium-ion batteries, particularly in grid-scale applications.

Batteries that use sodium instead of lithium could allow the U.S. and its allies to create a completely new supply chain for the energy storage taking off across the world

Peak Energy is proud to announce the inauguration of our state-of-the-art Battery Cell Engineering Center located in Broomfield, Colorado. This facility marks a significant milestone in our mission to advance sodium-ion battery technology and establish a robust domestic supply chain for energy storage solutions in the United States.

Peak Energy is proud to announce the successful closure of a $55 million funding round aimed at accelerating the development and commercialization of our sodium-ion battery technology. This investment underscores the growing interest in alternative energy storage solutions that can complement or replace traditional lithium-ion batteries, particularly in grid-scale applications.

Peak Energy has closed a $55M Series A led by Xora Innovation, with participation from Eclipse, TDK Ventures, and new strategic investors. The funding will accelerate full-scale sodium-ion system production and break ground on Peak’s first U.S. giga-scale sodium-ion battery factory, slated to open in 2027. Pilot deployments begin next year with six premier customers — including three of the nation’s top five independent power producers — marking a pivotal step toward U.S.-produced, utility-scale sodium-ion storage.

Peak Energy, founded by veterans of Tesla, Northvolt, and Enovix, has launched with a $10M seed round led by Eclipse and joined by TDK Ventures. The company is scaling sodium‑ion battery production in the U.S. to deliver cost‑competitive, grid‑scale storage for wind and solar energy. Unlike traditional startups, Peak is focused on rapid manufacturing scale-up of proven technology. The team brings deep experience in gigafactory design, operations, and financing—drawing on a track record of multi‑billion‑dollar scale at Tesla and Northvolt. Sodium‑ion batteries offer a safer, lower‑cost alternative to lithium‑ion for stationary applications, without the constraints of energy density that affect EVs. By manufacturing domestically, Peak strengthens supply chain resilience and reduces geopolitical and transport risks. Peak will deploy its first systems in 2024, targeting “double‑digit gigawatt” cell production by 2030 to support the U.S. grid’s growing need for energy storage.