Foxconn expands into energy storage business with launch of Fox EnerStor brand

Taiwanese electronics giant Foxconn has entered the global energy storage market with the launch of its Fox EnerStor brand, positioning itself to challenge established players such as CATL, BYD, and Tesla. Unveiled on October 21 at an event in Zhengzhou, the new brand marks a key milestone in Foxconn’s “3+3+3” strategic roadmap and highlights the company’s ambition to build a vertically integrated, globally competitive energy storage business.

Foxconn is leveraging its strengths in precision manufacturing, supply chain management, and global industrial deployment to build what it calls a “full-lifecycle energy storage platform.” The new business is anchored by an R&D center in Shanghai, a pilot facility in Wuhan, and a large-scale manufacturing and operations hub in Zhengzhou, in China.

According to company executives, Fox EnerStor will offer integrated energy storage solutions spanning residential, commercial and industrial (C&I), and utility-scale applications. Across all formats, Foxconn emphasizes long service life, high efficiency, reliability, and safety as the brand’s key differentiators.

The 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%. With a compact footprint of just 1.38 square meters and international certifications already secured, the system is designed for medium-scale commercial customers.

The 4.32 MWh distributed string system employs a “one-cluster-one-management” architecture, with each battery cluster equipped with an independent power conversion system (PCS) and customized thermal management that keeps temperature differentials below 2.5°C. Each cluster is physically isolated and features standalone pack-level fire protection, which the company highlights as essential for risk mitigation. The modular design is aimed at mid- to large-scale commercial users seeking flexible deployment options.

At the utility-scale level, Foxconn has launched a 9.37 MWh containerized solution, internally nicknamed the “Energy Beast,” based on its proprietary CTR+ stacking technology. Housed in a standard 20-foot container, the system delivers an 87% capacity increase compared with conventional market offerings. It also features cluster-level isolation and is engineered for simplified manufacturing and transportation, addressing what Fox EnerStor describes as a longstanding logistical bottleneck in large-scale energy storage.

Looking ahead, Fox EnerStor plans to launch a 488 kWh all-in-one unit and a 6.25 MWh container in 2026, further expanding its product lineup and enhancing capacity flexibility.

The company has developed an in-house software stack featuring proprietary battery management system (BMS) and energy management system (EMS) architecture to maintain tight control over safety and operational performance. Fox EnerStor has also established a “system-level safety defense framework” covering the cell, pack, cluster, full system, and smart monitoring layers. Additionally, it has secured a CNY 35 million ($4.9 million) commercial insurance package as a financial safeguard for customers. “Safety is the ‘1’ in storage value; efficiency and profitability are only the zeros that follow,” a company representative said.

Fox EnerStor’s Zhengzhou facility spans 20,000 m² and houses an automated pack assembly line with an annual capacity of 3 GWh, capable of integrating blade, prismatic, and pouch cells. Its India base in Tamil Nadu has secured 200 acres of land and will serve Southeast Asian and Middle Eastern markets, operating under a “China R&D, global manufacturing” model.

The company asserts that its mass production and scale advantages will enable system costs to drop to CNY 1.2/Wh, roughly 15% below current industry benchmarks, positioning Fox EnerStor to compete for C&I and grid-scale tenders alongside CATL, BYD, and Tesla.