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Distributed Energy Resource Testing

Committing to safety, performance and quality of distributed energy resource (DER) systems and products.

Electrical engineer working in electrical cabinet

Our distributed energy resource (DER) systems testing expertise

When you work with us, you get access to a global network of technical experts who understand local, regional and national requirements. These experts also serve as a trustworthy single source for your testing, certification and compliance needs. We help you determine and understand applicable market requirements. We work with you and with authorities having jurisdiction (AHJs) to define the grid code requirements for a specific installation and to design a customized testing program to meet the defined specifications. We also develop tests for special situations such as the use of noncertified components or for demonstrating to regulatory authorities that the mitigating means noted in the failure mode and effects analysis (FMEA) will operate as intended.

Testing inverters for DER to UL 1741 and other key standards

We test power inverters, converters and controllers to the requirements of UL 1741, the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, and all other key standards, including IEC 62109, UL 62109, the Standard for Safety of Power Converters for Use in Photovoltaic Power Systems, and local grid codes such as IEEE 1547. The extent and scope of testing is determined in part by whether the product is a stand-alone unit or intended for interconnection with a local utility.

Energy storage

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

Safety testing and certification for energy storage systems

UL 9540, the Standard for Energy Storage Systems and Equipment, is the new standard for safety of energy storage systems which includes electrical, electrochemical, mechanical and other types of energy storage technologies for systems intended to supply electrical energy. The standard covers a comprehensive review of energy storage systems, covering 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 UL 1973, the Standard for Batteries for Use in Stationary, Vehicle Auxiliary Power and Light Electric Rail (LER) Applications; UL 1741; IEEE 1547 and 1547.1; CSA FC1; NFPA 70; NFPA 2; ASME Boiler and Pressure Vessel Code; and ASME B31 piping codes. It includes additional criteria to address materials, enclosures, including walk-in enclosures, controls, piping, utility grid interaction, including special purpose interactive systems, hazardous moving parts, signage and instructions.

Energy storage systems certification can be achieved through a product testing engagement, typically utilized for off-the-shelf energy storage systems products, or through an on-site, nondestructive field evaluation for unique systems.

Stationary generators

Engine generators are the technology, products, services and infrastructure used to generate power for many applications including construction, oil and gas, commercial, industrial, standby and prime power. These products and services are critical to the proper operation of the electrical grid and distributed generation in many parts of the world. With the increase in use of engine generators around the world and the great demand for power, certification, testing, inspection and performance of engine generator equipment and installations is of great importance to the local authorities. Local authorities are concerned with the engine generator products, including portable generators, residential generators, commercial and industrial generators, relocatable generators, microturbines and gas turbines. We are accredited to provide global services for the acceptance of engine generator products and installations. This includes UL, IEC, ISO, ATEX, Hazardous Locations and regionally specific requirements. 

Streamlining expansion to a unique market

Why UL Solutions for distributed energy resource testing

We’re committed to being a world leader in the safety, performance and quality of DER systems and products. In addition to our leadership in the development of international and national power conversion standards, our DER testing laboratories in Germany, Greater China, India, Italy, Taiwan and the United States provide conformity services including safety, performance, and electromagnetic compatibility (EMC) testing for global markets.

  • Confidence in a quality service — Our experienced staff will advise you from the initial design stage of product development through testing and production. Our experts can assist you in understanding the certification requirements for your specific markets.
  • Knowledge you can trust — Our subject matter experts can help you understand the various safety and performance requirements for your specific market location through custom educational programs and on-site expertise. We test and certify to both UL Solutions and IEC standards.
  • Global reach and access — We have a powerful global network of technical experts who understand both the national and global requirements. Our state-of-the-art DER laboratories are easily available to you since they are in multiple regions of the world.
  • Supporting global standards — With independent, ISO 17025 accredited test facilities in Europe, Asia and North America, we can offer performance and safety testing to assist you in gaining market access. Our facilities offer evaluations to appropriate DER testing standards required to help you access global markets.
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Knowledge Services

At UL Solutions Knowledge Solutions, our goal is to help you develop safe, useful products that meet and exceed your customers' needs. Here you'll find dozens of training courses taught by qualified instructors.

Advanced Inverters UL 1741 SA

Modernizing the world’s electric grids is a critical enabler for achieving the societal benefits and avoiding brownouts or blackouts that come from optimizing the way we generate, distribute and use electricity. This webinar covers Advanced Inverters UL 1741 SA and how it intends to stabilize the grid and minimize disconnects.  


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