Energy Storage System Testing and Certification

Safety testing and certification for energy storage systems (ESS)

Large batteries present unique safety considerations because they contain high levels of energy. Additionally, they may utilize hazardous materials and moving parts. We work hand in hand with system integrators and OEMs to better understand and address these issues.

Understanding UL 9540 and ESS certification

UL 9540, the Standard for Energy Storage Systems and Equipment, covers electrical, electrochemical, mechanical and other types of energy storage technologies for systems intended to supply electrical energy. The Standard covers a comprehensive review of ESS, including charging and discharging, protection, control, communication between devices, fluids movement and other aspects.

UL 9540 provides a basis for safety of energy storage systems that includes reference to critical technology safety standards and codes, such as:

The standard includes additional criteria to address materials, enclosures, including walk-in enclosures, controls, piping, utility grid interaction, and special purpose interactive systems, hazardous moving parts, signage and instructions.

If successful, ESS certification can be achieved by evaluation of off-the-shelf components that are put together by the manufacturer or integrator and submitted for certification.

ESS performance and reliability testing

We also offer performance and reliability testing, including capacity claims, charge and discharge cycling, overcharge abilities, environmental and altitude simulation, and combined temperature cycling and vibration testing.

We offer performance testing to standards such as:

Our key services for battery energy storage system (BESS) applications

• Testing for safety compliance requirements 
  • We help you meet legislation and market access requirements set by countries across North America, South America, Europe and Asia.
• Testing for global safety and performance requirements
  • We are deeply knowledgeable about SAE, IEC, UN and UL Standards.
• Performance and reliability testing
  • We help demonstrate how your products will perform under anticipated usage and various hazardous scenarios — including abuse — during discharge and recharge cycles.
  • We offer custom research and testing services, witness testing and field evaluations.
• Regulatory and code compliance support services
  • Our seasoned experts can answer questions about the code requirements that may affect your products.
  • We also offer code review services that utilize our expertise in codes to provide technical opinions on requirements that impact product design and installation.

Our BESS services by application

• Commercial and industrial battery energy storage systems
• Residential battery energy storage systems
• Utility-scale energy storage systems
• Uninterruptible power supply (UPS)
• Electric vehicle charging equipment

Our BESS services by safety standard

Who can benefit from BESS services?

• ESS manufacturers can benefit from testing and certification services for ESS standards and codes. We also offer performance and reliability testing, including capacity claims, charge and discharge cycling, overcharge abilities, environmental and altitude simulation, and combined temperature cycling and vibration testing.
• Unit assemblers and system integrators can benefit from our comprehensive field evaluations that can help you demonstrate the compliance of an ESS installation to code authorities, owners and regulatory bodies (learn more here).
• Installers can benefit from our field services that bring compliance expertise to you to help address the safety and performance of equipment and systems as during or upon installation (learn more here).
• Module and pack manufacturers can benefit from electrical, mechanical and environmental testing to evaluate the ability of large batteries to safely withstand simulated abuse conditions based on your specified charge and discharge parameters (learn more here).
• Cell manufacturers can benefit from battery cell certification services that test to all applicable industry standards to help demonstrate the performance, reliability and safety of battery cells used in an increasing number of products (learn more here).
   

Marking for ESS

Depending on the applicability of the system, different standards need to be met before you can get your products into different installations and markets.

For example, depending on the area of Europe the product will be installed, you may need:

• CE marking and CE self-declaration for all Europe except the United Kingdom
• UKCA marking and UKCA self-declaration for Great Britain (as of January 1, 2021)
• UKNI Marking and UKNI self-declaration for Northern Ireland (as of January 1, 2021)

For any of the marking processes listed above, your system must meet the following requirements:

• Safety requirements for Marking and self-declaration   
  •  Low Voltage 2014/35/UE
  •  UK Legislation; Electrical Equipment (Safety) Regulations 2016
• EMC requirements for Marking and self-declaration   
  •  Electromagnetic Compatibility 2014/30/UE
  •  UK Legislation; Electromagnetic Compatibility Regulations 2016

Custom research of energy storage systems

We conduct custom research to help identify and address the unique performance and safety issues associated with large energy storage systems. Research offerings include: