FOX ESS Expands Global Manufacturing Capacity with New Wenzhou Facility

FOX ESS has officially commissioned its “Factory Phase II” in Wenzhou, China, marking a significant expansion in the company’s production of energy storage systems (ESS) and smart manufacturing capabilities. The new 46,000-square-meter facility utilizes automated production lines for over 60% of its processes, including the manufacturing of PCBA components, battery packs, and commercial-scale energy storage systems. According to company specifications, the facility is designed to produce one battery pack every seven seconds, supported by an internal power infrastructure that utilizes 6,000 kWh of renewable energy daily.

How does the new Wenzhou facility impact production output?

The Wenzhou Phase II plant serves as the centerpiece of FOX ESS’s strategy to meet increasing global demand for residential and industrial energy storage. By integrating standardized, automated assembly, the firm aims to improve both output volume and supply chain consistency. The facility focuses on high-density production of the company’s latest energy portfolios, specifically targeting the transition toward automated smart manufacturing. This shift is intended to help the company scale its response to international energy storage market requirements, which have seen rapid growth due to the global shift toward decentralized, renewable-powered grids.

What are the latest energy storage technologies from FOX ESS?

Following the facility’s opening, FOX ESS debuted its latest product lineup at the SNEC 2026 exhibition in Shanghai. The company introduced several new hardware solutions, emphasizing efficiency and installation modularity:

• PQ3-Ultra: A residential all-in-one ESS system utilizing Infineon silicon carbide (SiC) semiconductors. The use of SiC is intended to reduce power conversion losses and improve round-trip efficiency for photovoltaic (PV) systems.
• P100: A residential system that integrates the inverter and charging components into a single unit to simplify installation and provide reliable backup power.
• Industrial Systems: The G-MAX PLUS series and CQ7 battery storage systems are designed for peak shaving, long-duration energy storage, and industrial emergency power applications.

The company confirmed that the PQ3-Ultra has received VDE 4105:2026 certification from TÜV Rheinland, while the H3 PLUS hybrid inverter holds the CE-RED certification from DEKRA. The CQ7 series is compliant with IEC 62619 safety standards for industrial battery systems.

How is FOX ESS positioning its strategy in the Korean market?

FOX ESS maintains an active presence in South Korea, focusing on a diverse range of solar inverter outputs. According to Lucy Zheng, Key Account Director at FOX ESS, the company currently supplies the Korean market with both single-phase and three-phase inverter models. Their regional product strategy includes specific 65kW models tailored for local grid requirements, alongside larger units ranging from 75kW to 136kW.

The company’s growth in Korea is supported by a partnership with local firm RP5. Since initiating this collaboration in February 2025, FOX ESS has supplied over 115 MW of capacity to the Korean market. This partnership reflects a broader trend of international energy hardware manufacturers seeking local distribution and integration partners to navigate regional regulatory environments and technical standards.

Summary of Key Developments

As the global energy landscape shifts toward integrated smart grids, the ability to manufacture high-efficiency storage at scale remains a primary competitive factor. FOX ESS’s move to automate its production lines and expand its hardware portfolio indicates a focus on reducing the levelized cost of storage (LCOS) through improved hardware efficiency and streamlined manufacturing processes.