RE+ 25 | Sunwoda Launches 684Ah & 588Ah Energy Storage Cells Worldwide, Empowering Diverse Applications

2025-09-16 | Eric

On September 9 local time, Sunwoda made a global debut of its 684Ah and 588Ah energy storage cells at RE+ 25. With innovative technology, the company introduced a high-capacity cell product portfolio to deliver more efficient and reliable energy storage solutions for power generation, grid-side, and end-user applications.

Chen Tao, General Manager of Sunwoda’s Energy Storage Cell Division, stated: “The launch of the 684Ah and 588Ah energy storage cells marks an important step in Sunwoda’s ongoing innovation and advancement of large-capacity storage technology. Our original mission has always been to create high-safety, high-quality, and highly reliable products and solutions that meet the needs of multiple scenarios.”

684Ah Energy Storage Cell with Stacking Technology Leads in High Energy Density and System Integration

The 684Ah energy storage cell from Sunwoda adopts advanced stacking technology, achieving a volumetric energy density of over 440+ Wh/L, making it stand out among products of similar specifications. By integrating an innovative “thermal-electric separation” design with a three-dimensional cooling structure, it fundamentally optimizes the thermal management pathway, significantly enhancing operational safety and long-term reliability.

In terms of performance, the 684Ah cell delivers a lifespan of more than 20 years, meeting long-term operational demands. Notably, it offers excellent system integration adaptability, compatible with 10-foot, 20-foot, and 30-foot containerized solutions. Its high energy density and integrated design reduce container deployment by 27% and simplify assembly processes, lowering initial investment costs. With high energy density and easy installation and maintenance, it reduces the levelized cost of electricity (LCOE) by 8% compared to traditional solutions, while improving deployment speed and operational efficiency. The product is scheduled for mass production in Q4 2025 to meet market demand.

588Ah Energy Storage Cell with Mature Winding Process for Long Cycle Life and High Efficiency

The 588Ah energy storage cell adopts a proven winding process combined with innovative low-lithium-loss technology to effectively address capacity fade during long-term operation. It achieves a cycle life of up to 10,000 cycles @70% SOH, ensuring a service life of over 20 years and outstanding cost-effectiveness throughout its lifecycle.

This product delivers an energy efficiency of up to 96.5%. Supported by high-safety electrolytes and a directional exhaust channel design, it ensures system stability and safety while further reducing the LCOE, making it an excellent choice for applications with high economic performance requirements.

Innovation and Manufacturing Drive Global Energy Storage with Expanded Capacity and Product Portfolio

With the launch of the 684Ah and 588Ah energy storage cells, Sunwoda has built a comprehensive energy storage product portfolio that spans multiple technological routes and capacity levels. While adopting different processes—stacking and winding—both cells share the core advantages of long lifespan, high efficiency, and strong economic value, enabling diverse application scenarios and delivering more precise and reliable solutions.

At the same time, Sunwoda continues to expand its global manufacturing network, establishing production bases in China, Thailand, Hungary, and other regions to provide efficient and reliable localized supply chain support for key markets. Looking ahead, Sunwoda will further enhance its technological innovation and manufacturing capabilities to deliver energy storage products with higher energy density, longer service life, and greater system value, driving global energy transition and sustainable development.

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