Great Power’s Ultra 587Ah Cells Roll Off the Production Line in Quzhou
QUZHOU, China, October 13, 2026 — Great Power marked a major milestone in its energy storage manufacturing journey with a grand ceremony celebrating the commencement of mass production of its Ultra 587 Ah large-capacity energy storage cell at the Phase II facility of its Quzhou Zero-Carbon Factory. This achievement signals Great Power’s entry into a new phase of large-scale manufacturing and commercial delivery of high-capacity energy storage cells, further strengthening its ability to serve the rapidly expanding global energy storage market. Representatives from CRRC Zhuzhou Institute attended the ceremony as distinguished customer guests.
The event brought together senior executives from Great Power’s headquarters and Quzhou business division, representatives of CRRC Zhuzhou Institute, and key members of the company’s technology, engineering and manufacturing teams. During his opening address, Zhang Jingguo, General Manager of Great Power’s Quzhou manufacturing base, highlighted the exceptional product value and technological advantages of the Ultra 587 Ah cell, underscored the strategic significance of the project, and expressed his sincere appreciation to all partners and teams whose dedication and collaboration made this milestone possible.
Following the address, the Ultra 587 Ah cell made its official debut as a physical product was ceremoniously brought onto the stage. Great Power executives and representatives of CRRC Zhuzhou Institute jointly witnessed the landmark mass-production launch, commemorating the occasion with a ribbon-cutting ceremony and group photographs.
Designed specifically for utility-scale energy storage applications, the Ultra series represents a cornerstone of Great Power’s large-capacity battery portfolio. The newly mass-produced 587 Ah cell is engineered around two defining values: uncompromising reliability and exceptional efficiency. Through innovations in both materials’ chemistry and structural design, the cell delivers outstanding energy efficiency across a broad operating temperature range, exceeding 95% at 25°C and 96% at 45°C. With a cycle life of up to 10,000 cycles under normal-temperature conditions, it is designed to help customers achieve a lower levelized cost of storage (LCOS) and maximize economic returns throughout the battery’s operational lifetime.
Safety remains equally central to the product’s design. The Ultra 587 Ah cell has successfully passed a series of stringent safety tests, including nail penetration, thermal runaway and overcharging tests, and has passed UN 38.3 testing, demonstrating Great Power’s unwavering commitment to delivering dependable energy storage technology for demanding large-scale applications.
The mass-production milestone is supported by Great Power’s rapidly advancing manufacturing capabilities. Completed in 2025, Phase II of the company’s Quzhou Industrial Park covers approximately 456,000 square meters (684 mu) and adopts an innovative “ALL-IN-ONE” integrated manufacturing mode, bringing cell production, PACK assembly and complete energy storage system integration together within a single industrial campus. With an automation rate exceeding 95% on its cell production lines, the facility combines advanced intelligent manufacturing with streamlined production processes, enabling efficient, large-scale output and rapid responses to the integrated delivery requirements of international customers. It has become a vital manufacturing pillar supporting Great Power’s global expansion.
Looking ahead, Great Power will continue to advance application-driven innovation, develop increasingly competitive energy storage solutions, and strengthen its global delivery capabilities through advanced manufacturing. By combining technological excellence with a steadfast commitment to quality and reliability, the company aims to create lasting value for customers and partners worldwide while accelerating the transition toward a cleaner, more resilient and sustainable energy future.