ESS Tech and Juniper Energy Partner to Deploy Over 500 MWh of Sodium-Ion Battery Storage in the US by 2032

August 2, 2026

SodiumBatteryHub USA

Overview

ESS Tech and Juniper Energy have formed a long-term partnership to deploy over 500 MWh of sodium-ion battery storage systems across the U.S. by 2032. The initial project, a 10 MW / 80 MWh system in California, is slated for commercial operation in 2027. This landmark agreement significantly advances the adoption of non-lithium storage technologies for utility-scale applications, emphasizing sustainable and domestically sourced energy solutions.

In Depth

Key Findings

ESS Tech and Juniper Energy have entered into a long-term strategic partnership aimed at deploying more than 500 MWh of sodium-ion battery storage systems across the United States by 2032. This collaboration marks a significant acceleration in the commercialization and integration of non-lithium, cost-effective energy storage technologies into the U.S. utility sector. The first concrete deployment will be a 10 MW / 80 MWh system in California, projected to commence commercial operation in 2027, serving as a critical demonstration for large-scale sodium-ion applications.

Technical and Business Details

While ESS Tech is renowned for its iron-based flow battery technology, this partnership specifically targets sodium-ion battery storage systems, leveraging the advantages of abundant and inexpensive sodium resources compared to lithium. Sodium-ion batteries offer a more sustainable and less supply-chain-volatile alternative, making them ideal for grid-scale applications requiring long-duration storage. The planned deployment exceeding 500 MWh is designed to stabilize intermittent renewable energy generation and enhance grid reliability across various regions in the U.S. The California pilot project will be instrumental in validating performance and operational reliability under real-world conditions.

Although specific financial terms were not disclosed, this partnership is strategically positioned to drive market penetration for sodium-ion technology in the rapidly expanding U.S. energy storage market. Juniper Energy, with its strong track record in renewable energy project development, provides a robust channel for bringing ESS Tech’s advanced sodium-ion solutions to market.

Background and Industry Context

The global energy transition necessitates robust, long-duration energy storage solutions to integrate renewable energy sources and stabilize power grids. Lithium-ion batteries, while dominant, face challenges related to cost, resource availability, and environmental footprint. Consequently, there’s a growing imperative for alternative, non-lithium technologies like sodium-ion batteries. The U.S. government actively promotes investments in domestic clean energy technologies, and this partnership aligns perfectly with these policy objectives, responding directly to both market demand and strategic energy independence goals.

Strategic Significance and Outlook

This partnership heralds a new era for large-scale sodium-ion battery storage in the United States. Following the commercial operation of the initial California project in 2027, the deployment of over 500 MWh by 2032 is expected to substantially contribute to increasing renewable energy penetration and reducing reliance on fossil fuels. The success of this initiative could also accelerate the adoption of sodium-ion battery technology in other countries and regions, offering a viable and sustainable alternative in the global energy storage landscape, especially for long-duration applications where cost and resource security are paramount.

Source: https://sodiumbatteryhub.com/2026/07/24/us-sodium-ion-storage-gets-500-mwh-boost/

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