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Other national differences include references to UL for grid interactive product requirements and expansion of the requirements for multi-mode products that operate both grid-tied and stand-alone. To compare, UL specifies approximately 20 different tests and they are not all obligatory since this standard was written to address all forms of DGnor are they necessarily related to PV application.
The result was an evaluation addressing the classic safety challenges addressed in ULwith the additional evaluation of new risks for inverters and distributed generation products through the application of a modern, streamlined methodology. Principles, requirements and tests IEC In particular, SMA helped develop the requirement for current measurement in combination with the ground fault detecter interrupter GFDIwhich provides additional safety aspects for the detection of ground faults, while an increasing leakage current can be detected and monitored much earlier.
UL addresses many of the same hazards as ULyet does so in a different manner. This approach also included areas of refinement for both construction and testing requirements present in ULwhich UL had not previously addressed. UL addresses hazard prevention at a more granular level, which allows for greater flexibility in inverter design. The UL Mark can then be applied to the certified product and it can be sold in the U. PV ground fault protection requirements to address technology and NEC code changes.
IEC standards for PV modules. SMA believes an updated UL Standard, ULrepresents a significant step forward in harmonizing power conversion equipment safety requirements with an international perspective. Leading organizations involved in developing standards, in the field of solar power are:. UL will also continue to be used to evaluate non-PV power conversion equipment such as microturbines, generators, wind turbines, fuel cells, and the like.
General requirementspublished in Standards for Balance of Systems except PV inverters: NEC requirements for electrical power system compatibility.
If solar inverter installed is as per iec std. In addition, PV systems are challenged to provide a safe environment for new technology both in new installation modes implemented in newly built PV plant and building applications, as well as when integrated with existing buildings and infrastructure.
New Inverters Benefit from the Updated UL Standard | Industries | UL
As stated earlier, UL is a standard written for PV inverters only, which benefits customers because it means that inverters are now undergoing more testing to help ensure safety, reliability and functionality.
PV inverter product safety certifications.
These products can be evaluated to the standard for the U. The UL Mark is one of the most recognized, accepted and trusted certification marks on the planet, appearing on nearly 22 billion products worldwide.
The following standards list requirements for solar inverters such as the desired nameplate information, requirements for safe operation of inverters, procedures for measuring efficiency, general standard for inverters connected in independent power system, and many other requirements. Particular requirements for inverterspublished in Low voltage surge protective isc for D.
These newer standards benefit from the lessons learned and result in state-of-the-art sets of requirements. UL is the only certification organization in irc world authorized to issue UL Marks.
These include greater scope of design validation, safety enhancements and alignment of standards with the latest approaches for ground fault protection. PV industry soon, with the main initiator being 62109-22 release of the second part of the standard.
In addition to the harmonization of lec standards, IEC and UL have major positive cost impacts for international inverter manufacturers. While some standards are mandatory violators may be prosecuted as per lawothers are just for elevating the product standard and to include industry best practices and benchmarks.
Solar inverter certifications: UL 1741, IEC 61683, IEC 62109
They can then apply the well-known UL Mark for the U. UL certifications assess not only the safety performance of an end product through testing, they also review and validate the design via ic thorough assessment of the safety-critical components used in the end-product design and provide guidance if some components are not acceptable because of ratings or limitations within the certifications they have received.
The integration of photovoltaic PVenergy storage systems, and increased levels of distributed generation requires that standards, codes and deployment guidelines improve and advance. UL evaluates for safety risks including from electric shock and fire. IEC is based on UL and was expanded and updated to address cutting-edge safety aspects of PV power conversion equipment.
UL will retain the 62109-22 for grid interactive products, including the 62019-2 and references to the IEEE series of standards.
Manufacturers who plan to sell their inverter products in the U. Under this internationally recognized testing accreditation, UL can provide globally accepted evaluation reports, known as a Certification Body CB report, to inverter manufacturers.
Equipment to be installed outdoors IEC In 662109-2, achieving UL certifications to product safety standards help manufacturers like SMA demonstrate that a product operates more safely with expected normal use, as well as under foreseeable abnormal conditions.
New Inverters Benefit from the Updated UL 62109 Standard
Bundling safety, performance and interoperability services results in savings of both time and money. Photovoltaic off-grid application IEC Ed. Photovoltaic system performance monitoring EC It is now the U. These requirements allow products designed for the international market to more easily enter the U. All of these factors result in less project coordination time and ultimately, a faster product launch.