February 14, 2023

How do product standards like UL 9540 and testing like 9540A allow for safer installation of energy storage systems?

With the prevalence of energy storage system (ESS) installations, codes and standards have been updated to address the technology. Product standards like UL 9540 and testing like 9540A allow for safer installation of energy storage systems.

The codes and standards require electrochemical ESSs to be listed in accordance with UL 9540, the Standard for Safety of Energy Storage Systems and Equipment, which was first introduced in November 2016. The terminology can be a bit confusing. UL 9540 is a system listing, and is not for components. UL 9540A is a testing method, not a listing or certification. The combination of product standards and testing provide confidence in the safety of the systems for both authorities having jurisdictions and consumers.

Learn More

  • Listen to this webinar to hear a California Fire Marshal and an advisor to a DOE national lab discuss the standards in practical terms. 
  • Read the informational bulletin from an Industry Working Group: UL 9540A Fire Test Standard for Battery Energy Storage Systems.

Looking for further information about high performance buildings, energy storage, solar, and more? Visit the Clean Energy Clearinghouse for an expanded list of expert resources and CEU’s: