Ambri Incorporated is a Massachusetts-based energy storage company dedicated to advancing grid-scale renewable energy integration through its proprietary Liquid Metal™ battery technology. Founded in 2010, Ambri’s mission focuses on delivering long-duration energy storage solutions to enhance renewable energy reliability, reduce reliance on fossil fuels, and lower operational costs for utilities and industrial users. Their systems are engineered to address critical grid challenges such as energy shifting during peak demand, stabilizing intermittent renewable sources like wind and solar, and replacing aging power infrastructure.
Despite encountering financial restructuring in 2024, Ambri emerged with renewed investor backing, strategic partnerships, and technical certifications, positioning it as a key player in the energy transition. Notable collaborations with Microsoft, Xcel Energy, and Reliance Industries highlight its commitment to real-world deployment and commercialization of safe, high-performance storage solutions.
Battery Technology
Ambri’s Liquid Metal™ technology is a novel grid-scale battery design combining a liquid calcium alloy anode, molten salt electrolyte, and solid antimony cathode, all operating at temperatures of 500–600°C. The unique chemistry ensures no flammable materials or risk of thermal runaway, providing inherent safety and stability. This architecture enables 20+ year lifespans with minimal capacity loss and tens of thousands of charge/discharge cycles, far exceeding lithium-ion longevity.
The system leverages low-cost, recyclable materials—avoiding reliance on costly lithium—while eliminating the need for external cooling or fire suppression systems, reducing capital and operational expenses. Modular designs allow scalable deployment from pilot projects to utility-scale grids. Recent innovations include certifications like UL 1973 for its third-generation cells and progress toward commercially viable 1 MWh containerized systems by 2025.
Recent Projects
In 2024, Ambri advanced its utility-scale ambitions through a 12-month pilot with Xcel Energy at SolarTAC in Colorado. A 300 kWh Liquid Metal system tested renewable integration, frequency regulation, and capacity management, demonstrating its ability to handle daily grid cycles. Concurrently, Ambri expanded manufacturing capacity in Massachusetts and secured UL safety certification, validating its commercial readiness.
Following its Chapter 11 restructuring exit in July 2024, the company reaffirmed plans to ship its first containerized storage systems by 2025, targeting large industrial and grid clients. These milestones underscore Ambri’s shift toward commercialization after overcoming financial challenges and technical validation phases.
Investors
Ambri has garnered support from influential investors and industry leaders. Early backing includes Bill Gates, whose entities like Gates Frontier provided critical funding, alongside financial partners such as Paulson & Co., Fortistar, and Reliance New Energy Solar. Its $144 million Series E round in 2021, led by Reliance, further solidified its development trajectory. Post-restructuring, ownership shifted to a lenders’ consortium—including Paulson & Co., Fortistar, and Gates Frontier—securing funding to scale manufacturing and advance product deployment. This network of strategic investors reflects confidence in Ambri’s disruptive potential to redefine long-duration energy storage economics.
Business Details
Location: Marlborough, Massachusetts, USA
Website: https://ambri.com/
LinkedIn: https://www.linkedin.com/company/2702326
