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.

• References to ESS appear in the I-Codes:
  • International Fire Code, Chapter 12
  • International Residential Code 

• and NFPA Standards:
  • NFPA 1 Fire Code
  • NFPA 70, National Electrical Code, Article 706 
  • NFPA 855, Standard for the Installation of Energy Storage Systems
  • NFPA 110, Standard for Emergency and Standby Power Systems
  • NFPA 111, Stored Electrical Energy Emergency and Standby Power 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.