APsystems Marks Significant Safety Achievement with Successful UL 9540A Testing of APstorage 261L

APsystems Achieves a Milestone in Safety Testing



APsystems, a leader in energy storage solutions, recently celebrated a major milestone for its commercial and industrial (C&I) energy storage portfolio. The company announced that its innovative product, the APstorage 261L, has successfully passed the stringent UL 9540A fire propagation test, monitored by TÜV Rheinland. This test is known for setting a high bar in safety standards for energy storage systems on a global scale, evaluating various factors such as thermal runaway behavior and response to fire hazards.

Passing the UL 9540A Test


The UL 9540A test is comprehensive, assessing the safety performance of energy storage solutions through a detailed examination of heat release, smoke generation, temperature rise, and the system's overall capability to resist hazards related to fire and explosion. The APstorage 261L was rigorously tested under extreme conditions. Notably, the product was operated at a full state of charge while its fire suppression system was intentionally disabled, which are conditions that would typically be considered very risky.

Miraculously, the APstorage 261L cabinet maintained its structural integrity throughout these tests, showing no evidence of short circuits, fire spread, or explosions. This stellar performance demonstrates that the cabinet’s thermal runaway was fully contained. Key results from the tests include:
  • - Heat Flux: Recorded at 0 kW/m² near the affected cabinet—significantly lower than the UL 9540A threshold of 1.3 kW/m², effectively eliminating any risk of ignition for nearby equipment.
  • - Maximum Module Surface Temperature: 83.9°C on both affected and neighboring modules, proving that thermal propagation was successfully prevented.
  • - Maximum Adjacent Wall Temperature: Registered at 30.6°C, only slightly over the ambient temperature, indicating minimal thermal impact on the surrounding areas.

Safety Design Features


Safety isn’t just a feature for the APstorage 261L; it's a foundational aspect of its design. The system employs a single-cluster liquid-cooling architecture, which is instrumental in keeping cell temperature variations below 3°C. This not only enhances battery life but also improves operational safety. The comprehensive safety architecture of the APstorage 261L integrates multiple features:
  • - A 4-level fire-protection system
  • - Active ventilation
  • - Passive pressure relief mechanisms
These innovative elements combine to form a robust, multi-layered safety framework that safeguards the system from potential hazards at every level, from the individual battery cell all the way to the installation site.

Compact and Optimized Solutions for Europe


Beyond these remarkable safety achievements, the APstorage 261L has been tailored specifically for rapid and flexible deployment in commercial and industrial settings throughout Europe. With a minimal footprint of just 1.3 m², the system's plug-and-play connections simplify the installation and commissioning process. Its modular architecture facilitates easy expansion across multiple cabinets, making it an ideal choice for various commercial applications, including those involving solar-storage-charging systems.

APsystems is well-positioned to meet the demands of the European market, with a dedicated energy storage warehouse located in the Netherlands. This ensures local availability of products along with professional training and reliable on-the-ground technical support for users.

APsystems continues to enhance its range of end-to-end energy storage solutions, pledging to uphold high standards in safety, performance, and reliability. For additional details regarding APstorage, visit APsystems' European Energy Storage site.

Topics Energy)

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