GSL Energy’s R Series energy storage battery has officially obtained UL 9540A and UL 1973 certifications, two of the most authoritative safety standards in the global energy storage industry. The entire testing and certification process was completed by SGS, a globally recognized testing, inspection, and certification organization.

This milestone demonstrates that GSL Energy has reached internationally leading levels in energy storage battery safety technology, system risk control, and global compliance capabilities, laying a strong foundation for expansion into the North American market and other high-standard international markets.

Safety as the Core Foundation of Energy Storage System Development

As the global energy transition accelerates toward cleaner, distributed, and intelligent energy systems, energy storage system safety has become the industry’s most critical requirement.

From initial R&D to system design and manufacturing, GSL Energy embeds a strong “safety-first” philosophy throughout the entire product lifecycle. The R Series energy storage battery was developed from the outset in alignment with the world’s most stringent safety benchmarks.

UL 1973 Certification: Mandatory Safety Standard for the North American Market

UL 1973 is a core safety certification standard for battery energy storage systems in North America. It evaluates multiple safety dimensions, including:

• Electrical safety

• Mechanical safety

• Environmental adaptability

• Functional system safety

UL 1973 serves as a mandatory market access requirement for battery products entering the North American market. Achieving this certification confirms that the GSL Energy R Series meets strict international requirements in:

• Structural design integrity

• Electrical protection systems

• Material reliability

• System-level safety control

This certification significantly strengthens GSL Energy’s competitive position in North America.

UL 9540A Certification: Global Benchmark for Thermal Runaway and Fire Propagation Testing

UL 9540A is currently the most authoritative global test standard for evaluating thermal runaway and fire spread risks in battery energy storage systems.

The certification process involves rigorous testing at four levels:

• Cell level

• Module level

• Unit level

• Installation level

Key evaluation areas include:

• Thermal runaway trigger conditions

• Fire propagation pathways

• Structural protection capabilities

• System-level risk mitigation

UL 9540A has been widely adopted by fire safety authorities and regulatory agencies across North America as a reference for energy storage safety design. The successful completion of UL 9540A testing confirms the R Series’ ability to maintain system stability and structural protection under extreme conditions.

SGS Full-Process Testing and Global Compliance Support

Throughout the certification process, SGS provided comprehensive technical support, including:

• Standard interpretation and compliance guidance

• Product structure evaluation

• Testing and verification

• Global market access support

In addition to UL 9540A and UL 1973, the GSL Energy R Series has also obtained:

• IEC 62619

• CE certification

These certifications ensure compliance with safety and regulatory requirements across multiple international markets.

Driving Innovation Under the World’s Strictest Safety Standards

GSL Energy CEO Deng Yongjing stated:

“The acquisition of UL 9540A and UL 1973 dual certifications marks a major milestone in GSL Energy’s globalization strategy. From the earliest stage of R&D, the R Series was engineered with safety as its core foundation. These certifications validate our technological strength in battery safety and secure the passport for entry into the North American market.

Moving forward, GSL Energy will continue to innovate under the world’s strictest safety standards, strengthen strategic cooperation with SGS, and provide global customers with high-safety, long-life, and intelligent energy storage solutions that support the global green energy transition.”

Strengthening Global Market Expansion

With the successful completion of UL 9540A and UL 1973 certifications, GSL Energy further enhances its ability to serve:

• Residential energy storage markets

• Commercial and industrial energy storage applications

• Micro-grid systems

• Public utility projects

The R Series now meets some of the most rigorous safety requirements globally, strengthening its position in North America, Europe, and other regulated markets.

About GSL Energy

GSL Energy is an integrated energy enterprise specializing in the R&D and manufacturing of high-quality lithium iron phosphate (LFP) energy storage batteries.

Its products are widely used in:

• Residential energy storage

• Commercial and industrial energy storage

• Micro-grids

• Public utility energy systems

With advanced manufacturing capabilities, a comprehensive R&D system, and a strong global certification framework, GSL Energy provides ODM, OEM, and customized energy storage solutions for partners worldwide.

GSL Energy remains committed to safety, quality, and innovation as the core drivers of global green energy development.

About SGS

SGS is an internationally recognized testing, inspection, and certification organization with extensive expertise in the new energy and energy storage industries. Its laboratories are ILAC-accredited and provide one-stop certification services, from product design verification to global market access support.