This allows us to test and certify inverters, converters and other equipment for interconnected distributed generation in network support functions, making more intelligent and safe interconnections possible.
The second edition of the UL 1741 standard, issued in on September 7, 2016, distinguishes between two types of equipment:
- Utility Interactive Inverter
- Grid Support Utility Interactive Inverter (GSUI)
This version, including the supplement (SA), clears the way for improvements to general requirements established in the standard IEEE 1547 – Standard for Interconnecting Distributed Resources with Electric Power Systems. It allows for GSUI equipment to remain connected, despite stability issues. In turn, this will help the system to stabilize, creating better overall device efficiency.
Certain states in the US are now also issuing their own network interconnection requirements, to be verified using the testing methods referenced in UL 1741 SA. These tend to be the states with large numbers of solar power plants, such as California (Rule 21) and Hawaii (Rule 14). California has also recently announced UL1741 SA as a compulsory requirement for PV inverters.
“Receiving NRTL recognition helps SGS deliver the global certification requirements of solar energy manufacturers. Our first cases have been successful, with high levels of customer satisfaction. Our team is focused on providing the right service to help manufacturers sell their products on a global scale,” said Susanna Serra, Global Business Development Manager for Renewable Energy in SGS.
All equipment certified under this safety standard will bear the SGS North America Listed Mark.
SGS has been at the forefront of renewable energy technology for several years, conducting extensive research and development projects and sitting on all the main international standards committees. With an unparalleled reputation for honesty, commitment, competence and experience, SGS now works with all global PV inverter manufacturers, making it the leading global supplier of testing and certification services to the PV inverter market.
For more information, please contact:
Global Business Development E&E
SGS Tecnos, S.A.
SGS is the world’s leading inspection, verification, testing and certification company. SGS is recognized as the global benchmark for quality and integrity. With more than 90,000 employees, SGS operates a network of over 2,000 offices and laboratories around the world.