UL 9540B Safety Testing

Safety Testing for Residential Energy Storage Systems (ESS)

As battery and energy storage systems (ESS) technology evolves and adapts to various residential environments, Intertek recognizes the increasing need to address unique safety challenges. Our UL 9540B services ensure that energy storage systems meet the highest safety standards, giving manufacturers, installers, local authorities, and homeowners the confidence to embrace the energy transition securely.

What is UL 9540B?

UL 9540B, The Outline of Investigation for Large-Scale Fire Test for Residential Battery Energy Storage Systems, addresses fire propagation testing for ESS used in residential applications. It focuses on the safety of lithium-ion batteries and other energy storage technologies when exposed to thermal runaway, ensuring that systems can contain and manage potential fire hazards.

Achieving UL 9540B conformity is essential for manufacturers who want to bring their energy storage solutions to market, especially in applications where safety is a top priority, our homes.

How do UL 9540A and UL 9540B work in conjunction with each other?

UL 9540A applies to both residential and commercial energy storage systems (ESS), and it remains a mandatory standard even when pursuing UL 9540B evaluation. The UL 9540B standard introduces additional requirements specifically for residential energy storage systems, focusing on unit-level large scale fire testing.

However, the module-level testing required by UL 9540A is still necessary, meaning that the three test reports generated from UL 9540A (covering cell, module, and unit levels) are essential prerequisites. The UL 9540B report is an additional layer that builds on these requirements, providing a more comprehensive assessment of fire safety for residential installations.

Get Started with Intertek

Don't let the complexities of UL 9540B slow down your innovation. Partner with Intertek and leverage our expertise to bring your energy storage solutions to market with confidence.