US-made sodium-ion storage is now a central focus for ESS Tech as the company responds to fast-rising customer interest in battery energy storage. On June 30, 2026, ESS said it is redirecting resources toward a domestically made Sodium-ion Battery energy storage system after early demand exceeded expectations. As a result, the company is moving capital toward this product line while continuing work on its iron flow battery platform for long-duration storage.
Moreover, ESS said it has built an early-stage opportunity pipeline approaching $1 billion for its sodium-ion systems. The company targets short- and medium-duration energy storage uses that many buyers have traditionally served with Lithium-ion systems. Because of that, ESS sees sodium-ion as a strong fit for markets that need safer, scalable and locally sourced storage.
Why US-made sodium-ion storage matters for ESS Tech
ESS Tech said it signed a letter of intent with Alsym Energy. Since that agreement, the company has seen demand from data centers, critical infrastructure operators and utilities. Notably, ESS said this interest developed even though it had done limited outbound marketing. Therefore, management views the demand signal as unusually strong.
CEO Drew Buckley underscored that momentum. He said the level of sodium-ion demand stands apart from anything ESS has seen in its history. He also said energy demand is changing faster than the market can respond. As a result, ESS believes the industry needs new storage options that can deploy quickly and support a broad range of applications.
How US-made sodium-ion storage supports key markets
ESS Tech said customers across the power sector want battery systems that reduce fire and insurance exposure. In particular, hyperscalers and data center operators are looking for storage that can support rapid growth in electricity demand. In addition, many buyers want systems built with abundant and domestically available materials.
According to ESS, sodium-ion meets those needs in several ways. First, the chemistry virtually eliminates thermal runaway risk. Second, it relies on materials that are abundant and more readily available in domestic supply chains. Third, it helps customers reduce exposure to Foreign Entity of Concern concerns in sourcing and procurement. Consequently, ESS believes its sodium-ion offering aligns well with current buyer priorities.
Furthermore, utility and infrastructure customers often value speed, safety and supply certainty. ESS argues that its US-made sodium-ion storage strategy can address all three. That message appears to resonate in markets where operators need dependable energy storage for mission-critical operations.
ESS Tech resource shift toward US-made sodium-ion storage
To support this strategy, ESS will reduce expenses and cash burn at its Wilsonville, Oregon operations. At the same time, the company will redirect capital toward sodium-ion development and commercialization. This move shows a clear effort to match spending with areas of strongest customer demand.
Importantly, ESS is not abandoning its broader technology roadmap. The company said it will continue developing its iron flow battery technology for long-duration storage. However, it is giving sodium-ion a greater share of near-term attention because the market response has accelerated so quickly.
In practical terms, ESS plans to announce several sodium-ion products. These include container, rack and hardware offerings. The company also plans to provide software that monitors battery health and overall system health. Together, those products could help customers evaluate, deploy and manage sodium-ion storage more effectively.
What the $1 billion pipeline means for US-made sodium-ion storage
A pipeline approaching $1 billion is a notable figure for ESS Tech. Although these opportunities remain early stage, the number signals meaningful commercial interest. Just as important, the pipeline spans multiple end markets, including data centers, utilities and critical infrastructure. Therefore, ESS is not relying on a single customer segment to drive growth.
The timing also matters. Power demand continues to rise, especially from digital infrastructure and large-scale computing facilities. Because of that, operators need energy storage that can support reliability and flexible operations. ESS believes US-made sodium-ion storage can help fill that need in short- and medium-duration settings.
Additionally, domestic manufacturing has become a bigger selling point across the energy sector. Buyers increasingly want resilient supply chains and locally sourced technologies. ESS is positioning its sodium-ion strategy around those preferences, which could strengthen its appeal in the U.S. market.
Outlook for US-made sodium-ion storage at ESS Tech
ESS Tech has made a clear strategic choice. It is shifting resources toward US-made sodium-ion storage after seeing demand exceed internal expectations. With an early-stage pipeline nearing $1 billion, the company now aims to turn that interest into product launches and commercial deployment.
At the same time, ESS will keep advancing iron flow batteries for long-duration applications. Still, sodium-ion now stands out as the company’s near-term growth focus. If market demand from data centers, utilities and critical infrastructure continues, ESS could strengthen its position in the evolving U.S. energy storage market.
Overall, the company’s update points to a broader trend. Customers want energy storage that supports safety, domestic sourcing and fast deployment. ESS Tech believes US-made sodium-ion storage can deliver on those priorities, and its latest move reflects growing confidence in that opportunity.
Disclaimer:
The content presented on this page has not been manually verified by our team.
While we strive to ensure accuracy, we cannot guarantee the validity, completeness,
or timeliness of the information provided. Always consult with appropriate professionals
or sources before making any decisions based on this content.
The image is randomly selected and doesn’t necessarily represent the company or the news above.
