In early October 2013, the IEC TC82 WG2 (International Electrotechnical Commission / Solar Photovoltaic Energy Systems Standardization Technical Committee Module Working Group) annual meeting was held as scheduled in Kyoto, the ancient capital of Japan. IEC TC82, the International Electrotechnical Commission's technical committee for the standardization of photovoltaic energy systems, is the authoritative international body for publishing international standards on photovoltaic systems, modules, components, and materials. Given the global development of the photovoltaic market, photovoltaic production, testing, and certification institutions worldwide currently follow the relevant photovoltaic standards issued by the IEC. Therefore, each IEC TC82 WG2 meeting attracts numerous experts in the photovoltaic field, and these experts lead the evaluation criteria and development directions for the research, production, testing, and certification of photovoltaic modules and photovoltaic materials worldwide.

More than 60 photovoltaic experts from U.S. and EU energy policy research organizations, photovoltaic testing and certification institutions, photovoltaic module production and R&D enterprises, and photovoltaic material and equipment enterprises attended this meeting. Participating organizations included the U.S. Department of Energy's National Renewable Energy Laboratory (NREL), the European Commission's Joint Research Centre (EU-JRC), Germany's Fraunhofer Institute for Solar Energy Systems (Fraunhofer ISE), Underwriters Laboratories (UL) of the United States, TÜV Rheinland Germany, the VDE Testing and Certification Institute of the German Association for Electrical, Electronic and Information Technologies, TÜV SÜD China, TÜV NORD China, CESI, and China Building Materials Test and Certification Group Co., Ltd. (CTC). The five-day meeting was chaired by Dr. John Wohlgemuth of NREL. The discussions mainly covered standards related to photovoltaic modules, photovoltaic components, and photovoltaic materials, including 8 newly approved standards and 23 standards that had been approved and were being revised or drafted.

Xiao Pengjun, Deputy Director of the CTC National Center for Quality Supervision and Inspection of Solar Photovoltaic (PV) Products (hereinafter referred to as the PV Center), and Dr. Wang Li attended this meeting. Several years ago, CTC General Manager Ma Zhenzhu and Deputy General Manager Shi Xinyong keenly observed that adjustment of the national energy structure was imperative and that the development and utilization of solar energy would inevitably become a focus of future renewable energy development. They decided in 2009 to plan and build the PV Center. In early 2012, the CTC PV Center passed the national CNAS, CMA, and CAL assessments, as well as the assessments for TÜV NORD and the "Golden Sun" project contracted testing laboratory. During the intense preparation and laboratory assessment period of the PV Center, Deputy Director Xiao Pengjun successfully proposed two IEC international standards for photovoltaic glass in May 2012: IEC 62805-1 "Measurement of total haze and spectral distribution of haze of TCO glass for solar cells" and IEC 62805-2 "Measurement of transmittance and reflectance of TCO glass for solar cells," which not only addressed practical issues in photovoltaic glass testing but also expanded CTC's international influence in the photovoltaic field.

At this meeting, Deputy Director Xiao Pengjun reported and discussed with IEC experts on the development progress, standard content, and feedback on IEC 62805-1 and IEC 62805-2, the two standards under CTC's responsibility. In particular, he once again fully explained at the meeting the rationale for expanding the title of IEC 62805-2 from "Measurement of effective transmittance and reflectance of TCO" to "Measurement of effective transmittance and reflectance of photovoltaic glass," thereby expanding the scope of application of the standard. This was unanimously recognized by the attending experts. At the same time, the attending experts put forward corresponding opinions on the definitions of terms and classification in the standards. After revision according to these opinions, the two photovoltaic glass standards developed by CTC became CD drafts. They were expected to enter the CDV stage by the end of the year. At the meeting in May 2014, the CDV drafts would be revised according to suggestions from various countries, and if all went smoothly, they could enter the FDIS stage in 2014.

This international meeting played a very important role in understanding the latest international standard developments and the local photovoltaic market situation, as well as in meeting experts and obtaining the latest information. At the same time, in-depth exchanges were conducted with international experts in the photovoltaic field at the meeting, advanced technical experience and working methods in the field of international photovoltaic standards were learned, CTC's participation in international standard development was deepened, and CTC's international influence was further expanded.