Sunwoda has unveiled a next-generation ESS portfolio built on its 588 Ah LFP cell platform at ees Europe 2026, led by a 6.26 MWh liquid-cooled BESS. The company has also announced CSA Group fire-testing certification under ANSI/CAN/UL 9540A:2026 and TÜV Rheinland certification for its 261 kWh ESS under EU Battery Regulation 2023/1542.
Project Name – Sunwoda 588Ah-based next-generation ESS platform
Owner – Sunwoda
Project Type – Battery energy storage system (BESS) product launch and safety/compliance certification
Location – Unveiled at ees Europe 2026, Munich, Germany; targeting European market deployment
Technology Used – 588Ah high-capacity LFP cells; liquid-cooling and airflow thermal management; cluster-level BMS; centralized and string PCS compatibility
Project Status – Launched (announced June 25, 2026)
Purpose – To expand utility-scale and C&I energy storage offerings and demonstrate system-level fire safety and EU regulatory compliance
Expected Output – Higher energy density, smaller footprint and fewer components per system, plus certified compliance for European deployment
Contract Details – Not disclosed in the release
Headquarters – Shenzhen, China (Sunwoda); milestone announced from Munich, Germany
Sunwoda Electronic Co., Ltd., a China-based ESS solution provider, recently participated in ees Europe 2026 in Munich, Germany. The company showcased a wide range of energy storage technologies, including battery cells from 72 Ah to 684 Ah, along with utility-scale and C&I energy storage solutions.
The event marked the official launch of Sunwoda’s next-generation ESS portfolio, which is built on its 588 Ah high-capacity LFP cell platform. The new portfolio features a 20-foot 6.26 MWh liquid-cooled BESS, a 10-foot 3.13 MWh liquid-cooled BESS, and a 10-foot 3.13 MWh all-in-one liquid-cooled ESS, providing customers with flexible options for various capacities and deployment needs.
The 10-foot 3.13 MWh BESS is designed as a compact, flexible solution for projects with complex transportation, installation, or site layout needs. The 3.13 MWh all-in-one ESS incorporates factory-preconfigured AC/DC architectures to reduce on-site integration tasks and accelerate installation and commissioning.
As the flagship product in the series, the 6.26 MWh BESS has achieved a 24.8% increase in volumetric energy density, a 17% reduction in station footprint, and a 40% decrease in overall system components compared to Sunwoda’s previous generation. The platform is designed with a multi-layer safety architecture and a hierarchical electrical protection system to enhance fault isolation and improve system stability.
A coordinated liquid-cooling and airflow system has been designed to ensure even thermal distribution, while a cluster-level battery management system facilitates active balancing. The system supports both centralized and string power conversion configurations and is compatible with 2-hour and 4-hour applications, enabling deployment across a variety of utility-scale projects.
Alongside the product launch, Sunwoda has announced several safety and compliance milestones. The company has received certificates from CSA Group confirming that its 5 MWh BESS platform has completed large-scale fire testing in accordance with ANSI/CAN/UL 9540A:2026 and has been evaluated against CSA/ANSI C800:2025 requirements, validating the system’s safety at scale.
Sunwoda’s the 261 kWh ESS series has also received certification from TÜV Rheinland under EU Regulation 2023/1542, the EU Battery Regulation. The certification confirms compliance with requirements related to battery lifecycle management, material traceability, and digital battery passport readiness. Sunwoda stated that these regulatory validations are being expanded across its broader product portfolio.
Sunwoda stated that the new product launch, safety certifications, and EU compliance milestones represent progress in strengthening its European localization and after-sales technical support. The company said these efforts will help expand local energy storage and support the broader global energy transition.