Taiwanese electronics manufacturer Foxconn has officially entered the global energy storage sector with the launch of its new Fox EnerStor brand. Unveiled on October 21 during an event in Zhengzhou, China, the initiative represents a core component of Foxconn’s broader “3+3+3” strategic roadmap aimed at building a vertically integrated, competitive energy storage business.
The Fox EnerStor platform will cover residential, commercial and industrial (C&I), and utility-scale applications. An all-in-one 261 kW/522 kWh C&I system features a low center-of-gravity design and an optimized thermal architecture, delivering a reported roundtrip efficiency of 91%. The compact unit occupies just 1.38 square meters and carries several international certifications, positioning it for medium-scale commercial installations.
For larger C&I projects, Fox EnerStor’s 4.32 MWh distributed string system uses a “one-cluster-one-management” configuration. Each battery cluster has an independent power conversion system (PCS) and custom thermal controls that maintain temperature differentials below 2.5 °C. Physical isolation and pack-level fire protection are also integrated for risk mitigation, enabling flexible, modular deployment.
At the utility scale, the company introduced a 9.37 MWh containerized solution, dubbed the “Energy Beast.” Housed in a 20-foot container, this system leverages Foxconn’s proprietary CTR+ stacking technology to achieve an 87% capacity increase compared to conventional designs. Cluster-level isolation and streamlined manufacturing and transport workflows aim to address logistical constraints in large-scale installations.
Fox EnerStor’s product pipeline includes plans to release a 488 kWh all-in-one unit and a 6.25 MWh container in 2026. The business is supported by an R&D center in Shanghai, a pilot facility in Wuhan, and a major manufacturing hub in Zhengzhou, which spans 20,000 square meters and can assemble up to 3 GWh annually. An India-based facility in Tamil Nadu will serve Southeast Asian and Middle Eastern markets under a “China R&D, global manufacturing” model.
The company has also developed proprietary battery management and energy management systems and established a multi-layer safety defense framework covering cell to system levels. With in-house capabilities and scale advantages, Fox EnerStor aims to lower system costs to approximately CNY 1.2/Wh, positioning itself to compete with established energy storage providers in commercial and grid-scale tenders.
Source: ESS News
