Alsym Energy

Founded in 2015, Alsym Energy develops high-performance, non-lithium rechargeable batteries for renewable energy. Using manganese and metal oxides with a water-based electrolyte, their safe, non-flammable technology serves stationary storage, maritime, and EV applications. Backed by $78 M in funding, Alsym enhances sustainable energy solutions.

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Alsym Energy, founded in April 2015, specializes in developing non-lithium rechargeable battery technology for the renewable energy sector. The company produces high-performance, non-flammable batteries without using lithium or cobalt, making them safer and more sustainable than traditional options. Their innovative approach uses manganese oxide and metal oxides combined with a water-based electrolyte containing non-toxic additives. This design addresses critical safety concerns while maintaining competitive performance levels, particularly in stationary storage, maritime shipping, and electric vehicle applications.

Battery Technology

Alsym’s proprietary battery technology stands out through its unique composition and versatility. The batteries achieve system-level energy densities comparable to lithium-ion alternatives while eliminating fire risks associated with conventional batteries. Their water-based electrolyte system enables safe operation at elevated temperatures, reducing the need for extensive cooling equipment. The technology supports fast charging within four hours and offers flexible discharge durations ranging from 2 to 110 hours.

The batteries can store 1.7 megawatt-hours of electricity in a 20-foot container, making them suitable for various industrial applications. Their design allows for manufacture in existing lithium-ion facilities with minimal modifications, reducing production costs while maintaining high performance standards. The technology serves multiple sectors, including utility grids, residential storage, microgrids, data centers, and maritime applications. For industrial settings such as chemical plants and steel mills, where traditional lithium-ion batteries pose safety risks, Alsym’s non-flammable design offers a practical solution.

Recent Projects

In 2024, Alsym Energy signed a lease for a 60,000-square-foot facility at Exchange 200 in Malden, Massachusetts, establishing their new headquarters while maintaining operations at their Woburn location. This expansion aims to increase production capacity and meet growing customer demand. The company has also enhanced its prototyping and pilot lines to accelerate the commercialization of their battery technology.

Investors

Alsym Energy secured $78 million in a Series C funding round led by Tata Limited and General Catalyst. Additional investors include Thrive Capital, Thomvest, and Drads Capital. Before this round, the company had raised $32 million with support from Helios Climate Ventures while operating in stealth mode until 2022.