UL 1973

WHat is UL1973 Standard?

UL1973 (the Standard for Batteries for Use in Stationary, Vehicle Auxiliary Power and Light Electric Rail (LER) Applications) is a safety standard for energy storage systems. It specifies detailed requirements that manufacturers of ESS must meet to qualify for safety certification. UL1973 certification ensures that the ESS system is safe and reliable for use in real-world conditions. Compliance with UL1973 is necessary to ensure the safety, reliability, and proper functioning of the battery components of an ESS system.  

WHy UL1973 certification is important

With the increasing demand for renewable energy sources, energy storage is becoming essential for energy management. However, as with any electrical system, safety must be a top priority. UL1973 certification offers peace of mind to buyers that the ESS system they are purchasing complies with safety standards, is reliable, and contains features intended for its safe operation. 

Electrical utility companies and commercial businesses, ESS producers, and supply chain companies that provide producers with components and systems such as inverters, solar panels, and batteries must comply with UL1973 to ensure the systems' safe operation and protection of personnel and users from potential harm.  

TÜV SÜD - your partner for UL1973 Compliance

TÜV SÜD is a market leader in conformity assessment for sustainability and smart energy solutions. We provide a range of ESS testing and certification services to support manufacturers and operators to achieve UL1973 certification for energy storage systems.

Our testing laboratories are A2LA and ISO/IEC 17025-accredited and are fully equipped to evaluate your ESS against the requirements of all applicable standards, including: 

• UL 1973 
• NFPA 70 
• NFPA 855 
• UL 9540 
• UL 9540A 
• UL 1642 
• UL 62619  

Choose TÜV SÜD

TÜV SÜD has technical expertise, including in-house testing facilities and international experience with energy storage and smart energy solutions. The trust our customers place in us is a result of our commitment to impartiality, transparency in our processes, and the continuous improvement of our services. 

Our team of ESS technical professionals bring decades of relevant experience to help you meet your ESS challenges. They are knowledgeable about the latest developments in regulations and standards relevant to ESS and will work with you to successfully navigate the applicable testing and certification process.