Peak Energy to Construct US’s First 4 GWh Grid-Scale Sodium-Ion BESS Factory in California

July 12, 2026

ESS News USA

Overview

Sodium-ion battery startup Peak Energy announced plans to build the first 4 GWh grid-scale sodium-ion BESS factory in the U.S., located in Sacramento, California. The $71 million facility is slated to begin production and shipments in Q1 2027, accelerating the deployment of sodium-ion systems for high-demand sectors like data centers and industrial manufacturing. Peak Energy has already successfully deployed and operated a 3.5 MWh grid-scale sodium-ion system in Watkins, Colorado, validating its technology and operational experience.

In Depth

Key Findings

Peak Energy, an emerging leader in sodium-ion battery technology, has announced plans to establish the United States’ first dedicated manufacturing facility for grid-scale sodium-ion Battery Energy Storage Systems (BESS) in Sacramento, California. This significant investment will create a factory with an impressive 4 gigawatt-hour (GWh) production capacity, poised to substantially accelerate the commercialization and widespread adoption of sodium-ion battery technology.

Technical Details

The project, an estimated $71 million investment, is scheduled to commence production and shipments by the first quarter of 2027. The factory will focus on manufacturing high-quality sodium-ion BESS tailored for high-demand applications requiring reliable energy storage, including data centers, industrial manufacturing facilities, and utility grids. Sodium-ion batteries offer inherent advantages such as lower raw material costs and reduced supply chain risks compared to lithium-ion counterparts, as sodium is an abundantly available resource. Peak Energy has already demonstrated its proven technology and operational expertise through the successful deployment and operation of a 3.5 MWh grid-scale sodium-ion system in Watkins, Colorado, which serves as a foundational precedent for this major manufacturing expansion.

Background & Context

The U.S. is aggressively pursuing clean energy transitions and grid modernization, leading to a surge in demand for reliable, large-scale energy storage solutions. Amid concerns over the fragility of lithium-ion supply chains and geopolitical dependencies, sodium-ion battery technology is gaining strategic importance for strengthening domestic manufacturing and enhancing energy independence. California, a pioneering state in renewable energy integration, faces an urgent need for substantial storage capacity to balance its abundant daytime solar generation with evening peak demand, a challenge sodium-ion BESS is well-suited to address.

Strategic Significance & Outlook

The construction of Peak Energy’s 4 GWh sodium-ion BESS factory represents a paradigm shift in the U.S. energy storage market. Upon commissioning, this facility will stabilize the supply of sodium-ion BESS and enhance its cost competitiveness, making it a more accessible solution for diverse applications. Accelerated adoption is anticipated across various sectors, including backup power for data centers, microgrids, and utility grid stabilization. This investment is a crucial step for the U.S. to establish global leadership in next-generation battery technology and realize a sustainable energy future. The increased manufacturing capability and technological maturity of Peak Energy are expected to introduce new competition to the lithium-ion market and diversify electricity storage solutions, bolstering energy resilience nationwide.

Source: https://www.ess-news.com/2026/07/09/peak-energy-to-build-4-gwh-grid-scale-sodium-ion-bess-factory-in-california/

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