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APsystems Reaches Safety Milestone with APstorage 261L

In a significant advancement for energy storage safety, APsystems has successfully passed the rigorous UL 9540A testing for its APstorage 261L solution. This test, conducted under the supervision of TÜV Rheinland, is one of the world's most stringent safety standards for energy storage systems, primarily targeting commercial and industrial applications. The results of this testing not only elevate APsystems’ reputation in the marketplace but also reassure customers of the high safety standards upheld in their products.

Understanding UL 9540A Testing

The UL 9540A standard evaluates thermal runaway behavior at various levels — from individual cells to entire systems. It assesses critical factors such as heat release, smoke production, temperature rises, and overall system response. By successfully achieving these benchmarks, the APstorage 261L has demonstrated its robust design, enhancing safety against risks such as fire and explosion.

During testing, the APstorage 261L was subjected to extreme conditions, operating at 100% state of charge (SOC) with its fire suppression system intentionally disabled. Remarkably, there were no short circuits or fire propagation incidents, and the cabinet maintained its structural integrity throughout the test. This achievement speaks volumes about the engineering behind the product.

Key Test Outcomes

• - Heat Flux Measurement: Recorded at 0 kW/m² near the cabinet, significantly below the UL 9540A threshold of 1.3 kW/m², effectively negating risks of inflaming adjacent equipment through thermal radiation.

• - Maximum Surface Temperature: Recorded at 83.9°C on the module itself and neighboring units, preventing thermal propagation between modules.

• - Adjacent Wall Temperature: The temperature increase was recorded at just 3.1°C above ambient, ensuring minimal thermal impact on the surrounding environment.

Successful testing also confined thermal runaway entirely within a single cabinet, keeping neighboring units safe, which is a pivotal design feature focused on risk mitigation.

Proactive Safety Design

Every aspect of the APstorage 261L has been meticulously engineered with safety in mind. The system incorporates a unique liquid cooling architecture that maintains cell temperature fluctuations below 3°C, enhancing both battery lifespan and operational safety. APsystems’ approach includes a comprehensive safety framework with:

• - A four-layer fire protection system
• - Active ventilation
• - Passive decompression mechanisms

These elements collectively create a multi-tiered safety structure that safeguards the system from cell level all the way to complete installation.

Compact and Flexible Solution for Commercial Use

Beyond safety, the APstorage 261L is designed for rapid deployment across European commercial and industrial projects. With only 1.3 m² of footprint, the system features plug-and-play connections that simplify installation processes. Its modular architecture supports seamless parallel expansion across multiple cabinets, making it an ideal solution for industrial setups, commercial buildings, and solar energy storage applications.

With an extensive network across Europe and a dedicated energy storage hub located in the Netherlands, APsystems ensures local product availability, professional training, and reliable on-site technical support.

As APsystems continues to expand its portfolio of comprehensive energy storage solutions, APstorage consistently raises the bar in safety, performance, and reliability, leading the way in the energy storage industry.

For further details, please visit APsystems' official site.