UL 9540A Battery Energy Storage System (ESS) Testing



Helping you test to the requirements of UL 9540A as specified in NFPA 855, UL 9540 and the International Fire Code (IFC).

Let’s Talk about ESS

At CSA Group, our leading battery energy storage system (ESS) experts will work with you to help ensure your products meet the requirements of UL 9540, NFPA 855 and IFC. Please fill out the form below to speak to an ESS expert today.


All required fields are marked with an asterisk.


  • globe icon

    Collaboration Through the Product Life Cycle

    Our experts can work with you early in the product life cycle of your Energy Storage System (ESS) to evaluate your initial design against applicable standards and codes that impact your product

  • certify icon

    Direct Access to ESS Expertise

    We’re more than just respected leading experts in the ESS field - our ESS experts are very responsive, listening to your ideas and questions and replying to your input promptly

  • process icon

    Global Presence

    Our state-of-the-art labs execute ESS certification and performance tests worldwide to provide the service local to your manufacturing.

subject image

Our Commitment

Providing testing services for your battery energy storage system to help you ensure your product can meet the requirements of UL 9540A as specified in NFPA 855, UL 9540 and the International Fire Code (IFC).

  • Expertise in Thermal Runaway Testing: We have extensive experience initiating thermal runaway in battery ESS. Cell testing of all chemistries to determine thermal runaway parameters or confirm the lack of thermal runaway
  • Trusted Battery Fire Testing Expertise: Reliable evaluation of fire testing of your Battery Energy Storage System (BESS) at the cell, module, unit and installation level as required by the UL 9540A test method

Why Choose CSA Group

Credible Testing & Certification Body with extensive knowledge of US and Canadian requirements for certification, field evaluation, and fire testing to provide everything you need to make your BESS implementation a success.

Timely Delivery to Meet Your Market Needs: Knowing the importance of getting to market quickly, we specialize in streamlining our testing and certification services to help meet your delivery timelines.

Trusted Experience providing product testing and certification for over 100 years.