UL Solutions Introduces Certification Pathway for DC Energy Storage Systems, Simplifying Reviews of Modular Installations

UL Solutions (NYSE: ULS) introduced a certification pathway for modular direct current (DC) energy storage systems used for backup power and grid-scale storage.

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New certification program supports flexible system configurations and helps reduce complexity when modular installations undergo certification and code authority review.

• The certification addresses modular DC energy storage systems that connect evaluated subsystems, including power conversion systems.
• Compatible subsystem models are documented in the UL Product iQ^® certification database for verification by code authorities.
• Evaluations address electrical safety, communication and interoperability between the system and identified subsystems.

NORTHBROOK, Ill.--(BUSINESS WIRE)-- UL Solutions (NYSE: ULS), a global leader in applied safety science, today announced a new certification pathway designed to help manufacturers of modular direct current (DC) energy storage systems, used for backup power for critical infrastructure and grid-scale energy storage, bring systems to market with greater flexibility and clearer documentation for installation reviews.

Modular DC battery energy storage systems can be configured with different components to meet project needs. The new UL Solutions certification pathway evaluates identified system combinations for electrical safety, communication and interoperability.

An energy storage system captures energy so it can be stored for later use and provides electricity to the grid or to a building’s wiring system. A battery energy storage system can help save energy by reducing the number of times electricity must be converted from one form to another, including conversion between alternating current (AC) and DC. It can also simplify the connection to solar panels, backup generators and other equipment. Many of these systems use a modular design, allowing manufacturers to combine different components for a project. However, confirming that those components work safely together can make certification and installation reviews more complex.

The new certification program offers manufacturers an alternative to seeking a full matched-assembly system listing at the outset. When a compatible subsystem is identified, the resulting certification documentation can provide manufacturers, developers and code authorities with information about the evaluated configuration.

“Modular energy storage designs require a clear way to demonstrate how the system and its critical subsystems work together,” said Wesley Kwok, vice president and general manager of the Energy and Industrial Automation group at UL Solutions. “This certification program gives manufacturers, developers and code authorities documented information about evaluated system combinations while supporting a more flexible approach to DC energy storage system design.”

Through the new certification program, UL Solutions evaluates the DC energy storage system with each identified subsystem to applicable requirements of UL 9540, the Standard for Energy Storage Systems and Equipment. The evaluation addresses electrical, communication and interoperability between the system and its evaluated subsystems. Compatible subsystem models are documented in the UL Product iQ^® certification database under the DC energy storage system certification category, allowing code authorities to verify evaluated combinations.

UL 9540 testing covers electrical, electrochemical, mechanical and other types of energy storage technologies used in systems intended to supply electrical energy. Its evaluation framework includes charging and discharging, protection, controls, communication between devices and other system-level considerations.

Learn more about UL Solutions energy storage system testing and certification services at UL.com/services/energy-storage-system-testing-and-certification.

About UL Solutions

A global leader in applied safety science, UL Solutions Inc. (NYSE: ULS) transforms safety, security and sustainability challenges into opportunities for customers in more than 110 countries. UL Solutions delivers testing, inspection and certification services, advisory offerings and software solutions that support our customers’ product innovation and business growth. The UL Mark serves as a recognized symbol of trust in our customers’ products and reflects an unwavering commitment to advancing our safety mission. We help our customers innovate, launch new products and services, navigate global markets and complex supply chains, and grow sustainably and responsibly into the future. Our science is your advantage.

View source version on businesswire.com: https://www.businesswire.com/news/home/20261020793648/en/

Media contacts:
Steven Brewster
UL Solutions
ULNews@UL.com
T: +1 (847) 664.8425

Tyler Khan
UL Solutions
ULNews@UL.com
T: +1 (847) 664.2139

Source: UL Solutions Inc

Key Terms

interoperability technical

Interoperability is the ability of different systems, devices, or software to work together smoothly and share information easily. It matters to investors because it enables more efficient operations, better data sharing, and faster decision-making across various platforms or technologies. When systems are interoperable, they can connect and communicate as if they were part of a single, unified system, reducing complexity and increasing overall effectiveness.

ul 9540 technical

UL 9540 is a safety standard and certification scheme for energy storage systems, such as large battery installations, that checks their design, construction and fire-safety features. For investors it signals whether a storage project meets recognized safety and permitting benchmarks—similar to a building passing inspection—which affects regulatory approval, insurance costs, operational risk and the marketability of the asset.