Enerpoly

Enerpoly AB, based in Stockholm, develops sustainable zinc-ion batteries using zinc and manganese. Their safe, non-toxic energy storage solutions enhance renewable energy integration and grid stability. With patented technology and the EPIC megafactory, they aim for scalable production by 2026.

Share This Post

Enerpoly AB, established in Stockholm, Sweden, represents a significant advancement in energy storage solutions through its innovative zinc-ion battery technology. Founded in 2018 by Eloisa de Castro (CEO), Dr. Mylad Chamoun (CTO), and Dr. Samer Nameer (CSO), the company develops and manufactures sustainable battery cells and packs. Their approach focuses on creating affordable, reliable energy storage solutions using abundant materials like zinc and manganese. The company’s strategy emphasizes local material sourcing and production, reducing dependence on global supply chains while supporting the transition to renewable energy systems.

Battery Technology

Enerpoly’s zinc-ion batteries incorporate several technical innovations that set them apart in the energy storage market. The technology uses zinc metal as the anode and manganese dioxide as the cathode, combined with a water-based electrolyte system. This configuration delivers significant advantages in terms of safety and environmental impact, as the materials are non-flammable, non-toxic, and non-explosive.

The company has developed patented solutions to address common challenges in zinc-ion technology, such as zinc dendrite formation on the anode. Their engineering improvements extend to cathode performance optimization and electrolyte formulation, resulting in enhanced battery life and reliability. The manufacturing process employs a proprietary dry electrode method, enabling efficient and scalable production.

Through their Enerpoly Production Innovation Center (EPIC), the company aims to achieve an annual production capacity of 100 MWh by 2026, sufficient to power approximately 20,000 homes. Their batteries are specifically designed for stationary energy storage applications, supporting grid stability and renewable energy integration.

Recent Projects

In late 2024, Enerpoly acquired a production line from Nilar AB and strengthened its leadership team by hiring former Northvolt executives Annika Werneman and Emelie Tillegard. The company has also opened its 6,500m2 megafactory in Rosersberg, northern Stockholm. This facility, known as EPIC, began commissioning with production scheduled for early 2025. The installation represents the world’s first zinc-ion battery megafactory, establishing a model for future expansion.

Investors

Enerpoly has secured substantial financial backing from various sources, including prominent Swedish and American investors. Notable supporters include Fredrik Sidhagen (RCO Group CEO), Johan Nord (former Trustly CCO), Eirik Winter, Malin Engman, and André Rhodin. The company has received significant institutional support, including an SEK 88.5 million grant from the Swedish Energy Agency and €2 million from the European Innovation Council. Additional funding has come through Vinnova and the Eurostars Programme.