Buy IEC SAFETY OF POWER CONVERTERS FOR USE IN PHOTOVOLTAIC POWER SYSTEMS – PART 2: PARTICULAR REQUIREMENTS FOR. Discover certifications for solar inverters, including EN , EN , UL , IEC , IEC and IEC Visit our website and learn more about IEC standards.

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The integration of photovoltaic PVenergy storage systems, and increased levels of distributed generation requires that standards, codes and deployment guidelines improve and advance.

This must happen in parallel with technological innovation and the increased demand for cleaner energy. As PV systems become more intelligent and commonplace in electrical power systems, they must also become more adaptive to changing grid conditions and environmental stresses, and provide longer lifetime durations while remaining cost competitive with existing traditional power generation sources.

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.

Photovoltaic standardization

SMA believes an updated UL Standard, ULrepresents a significant step forward in harmonizing power conversion equipment safety requirements with an international perspective. Utilities and authorities having jurisdiction AHJs require distributed generation that is reliable, safe, compatible with the requirements of the National Electrical Code NECand has been tested and constructed to withstand the rigors 621099-2 daily, full power operation without significant amounts of downtime.

PV inverter product safety certifications.

It is now the U. IEC is based on UL and was expanded and updated to address cutting-edge safety aspects of PV power conversion equipment. UL participates in the development ieec many IEC standards, with a heavy emphasis on participation on renewable energy technical committees, and this facilitates collaboration and standards development.

While based on the foundation of ULIEC is somewhat different because IEC it was specifically developed to also address not only known gaps in Ic but also the challenges of emerging PV power conversion technologies. UL addresses hazard prevention at a more granular level, which allows for greater flexibility in inverter design.

National deviations were established in UL to allow products evaluated under IEC to be brought into the 621109-2. NEC requirements for electrical power system compatibility.

UL addresses many of the same hazards as UL 62190-2, yet does so in a different manner. These newer standards benefit from the lessons learned and result in state-of-the-art sets of requirements.

  ASTM F2129 PDF

UL evaluates for safety risks including from electric shock and fire. These requirements allow products designed kec the international market to more easily enter the U. This work includes significant revisions to the U. PV ground fault protection requirements to address technology and NEC code changes.

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. UL will retain jec requirements for grid interactive products, including the linkage and references to the IEEE series of standards.

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.

This approach also included areas of refinement for both construction and testing requirements present in ULwhich UL had not previously 621009-2. 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.

There are multiple notable advantages for manufacturers that certify their inverters to UL These include greater scope of design validation, safety enhancements and alignment of iex with the latest approaches for ground fault protection. For example, UL is the most widely accepted international PV lec conversion standard and corresponding certifications help to future-proof inverter designs.

SMA is the first inverter manufacturer to have a product on the market with a V, UL certification. 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 ic ensure safety, reliability and functionality.

UL specifies more than 50 different 621092, which is significantly more than specified by UL To compare, UL specifies approximately 20 different tests and they are not all 62109- since this standard was uec to address all forms of DGnor are they necessarily related to PV application. In addition to the harmonization of both standards, IEC and UL have major positive cost impacts for international inverter manufacturers.

This fundamentally reduces the test efforts and the project cycling time. The end result is that the inverter can be brought to market more quickly with a lower cost of production. Since UL has not been released, an alternative had to be identified. SMA found the opportunity to have this technical guidance to be a unique benefit of working directly with UL instead of another third-party certifier.


All of these factors result in less project coordination oec and ultimately, a faster product launch. In particular, SMA helped develop the requirement for current measurement in combination with the ground fault iiec interrupter GFDIwhich provides additional safety aspects for the detection of ground faults, while an increasing leakage 662109-2 can 62109–2 detected and monitored much earlier.

PV industry soon, with the main initiator being the release of the second part of the standard. Under this internationally recognized testing accreditation, UL can provide globally accepted evaluation reports, known as a Certification Body CB report, to inverter manufacturers.

These products can be evaluated to the standard for the U. The UL Mark can then be applied to the certified product and it can be sold in the U. Manufacturers who plan to sell their inverter products in the U.

They can then apply the well-known UL Mark for the U. The need for only one project to complete product evaluation, testing and certification to the standard maximizes the coverage of certification budgets and accelerates product market entry.

UL certifications assess not only the safety performance of an end product through testing, they also review and validate the design via a 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.

In the end-product application, UL Recognized Components may sometimes need additional evaluation to function correctly and safely due to the environment in 26109-2 they reside. In summary, 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.

Solar inverter certifications: UL 1741, IEC 61683, IEC 62109

The UL Mark is one of the most recognized, accepted and trusted certification marks on the planet, appearing on nearly 22 billion products worldwide. UL is the only certification organization in the world authorized to issue UL Marks.

Bundling safety, performance and interoperability services results in savings of both time and money.