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APsystems Celebrates Key Safety Milestone with APstorage 261L Passing UL 9540A Tests

In a significant achievement for the energy storage industry, APsystems has successfully tested its APstorage 261L energy storage system against the stringent UL 9540A standard. This test, conducted in the presence of TÜV Rheinland specialists, demonstrated remarkable fire safety performance, marking a crucial advancement in the safety portfolio of APsystems' energy storage solutions for the commercial and industrial (CI) sectors.

Understanding UL 9540A Standards

UL 9540A is recognized globally as one of the most rigorous safety standards specifically designed for energy storage systems. The testing process evaluates how a system behaves during thermal runaway events at the cell, module, and system levels. Key metrics include heat output, smoke generation, temperature increases, and overall reactions to assess the system's resistance to fire and explosion risks.

Exceeding Industry Standards

The APstorage 261L underwent testing under extreme conditions, including a 100% state of charge and deliberately disabled fire suppression systems. Remarkably, no short circuits, fire spread, or explosions occurred, and the unit maintained its structural integrity throughout the testing process.

• - Heat Flux Density: The heat flux density near the tested cabinet registered at 0 kW/m², significantly below the UL threshold of 1.3 kW/m², eliminating the risk of igniting nearby equipment from radiant heat.
• - Maximum Module Temperature: The highest recorded temperature of 83.9 °C was observed on both the tested module and its neighbor, indicating highly effective containment of thermal runaway between modules.
• - Wall Temperature: The maximum temperature of adjacent walls reached only 30.6 °C, just 3.1 °C above ambient temperature, showcasing minimal thermal impact on surrounding areas.

At all testing levels, thermal runaway stayed completely confined within a single cabinet, with no risk to neighboring units. This exceptional performance illustrates APsystems’ commitment to safety.

Integrated Safety Features

Safety is a fundamental aspect of every component within the APstorage 261L design. The system features a clustered architecture with liquid cooling, ensuring that temperature variations across cells remain within 3 °C, thus enhancing battery longevity and operational safety. Furthermore, it includes a comprehensive safety architecture consisting of:

• - Four-Level Fire Protection System
• - Active Ventilation
• - Passive Pressure Relief Mechanisms

These elements collectively create a robust, multi-layered safety system that safeguards all components from individual cells to the entire installation.

Adaptability for CI Projects in Europe

Beyond its outstanding safety credentials, the design of the APstorage 261L meets the needs for rapid and flexible deployment in commercial and industrial sectors across Europe. Occupying only 1.3 m², the system features plug-and-play connections for simplified installation and commissioning.

Its modular architecture allows for easy scalability through parallel connections of multiple units, making the APstorage 261L an ideal choice for industrial facilities, commercial buildings, and projects integrating solar generation and energy storage with charging infrastructure.

Thanks to APsystems' extensive European network and specialized warehouse for CI energy storage systems in the Netherlands, APstorage clients have access to local products, professional training, and reliable on-site technical support.

As APsystems continues to expand its portfolio of comprehensive energy storage solutions, the company remains dedicated to delivering ever-increasing levels of safety, performance, and reliability.

For more information, please visit the website APsystems Energy Storage.