In the wave of global energy transformation, distributed photovoltaics and industrial and commercial energy storage are standing at the forefront of the times, leading the new direction of green and low-carbon development. On July 4-5, the 2024 Distributed Photovoltaic Conference and Industrial and Commercial Energy Storage Seminar, hosted by the Jiangsu Photovoltaic Industry Association and organized by the International Energy Network, was grandly held in Nanjing, Jiangsu. The theme of this conference was “Green Energy New Quality Productivity”.
At the distributed photovoltaic main forum on July 5, Zhang Wei, technical manager of Grand Sunergy Gaoling (Jiangsu) Electric Power Co., Ltd., was invited to attend and delivered a keynote speech entitled “Typical Application Scenarios and Advantages Analysis of HJT Components” on the important topic of “Building a Distributed Photovoltaic Industry Ecosystem for High-Quality Development”.
In recent years, the distributed photovoltaic (PV) market has rapidly developed, driven by policy support and market expansion. Despite intense competition, distributed PV still has untapped potential. Zhang Wei believes that distributed PV is mainly used in public, commercial, and industrial rooftops, which require higher performance in terms of safety, reliability, efficiency, and stability. Limited rooftop space demands higher module power and larger installed capacity to enhance unit area utilization and project returns.
With years of market development and technological exploration, heterojunction (HJT) technology has matured, expanding its market applications. Zhang Wei presented Grand Sunergy’s comprehensive system solution for commercial and industrial PV energy storage, highlighting diverse HJT applications, including urban, ecological, transportation, and residential PV. He introduced key technologies such as zero-carbon industrial parks, BIPV integration, composite rooftop PV systems, and optimized energy storage systems.
HJT technology leads in cost reduction and efficiency improvement. Zhang Wei showcased Grand Sunergy’s HJT modules’ advantages over TOPCon: superior low-light performance, high conversion efficiency, high power output, high bifacial rate, low-temperature coefficient, low power degradation, and no PID or LID, ensuring high reliability in various scenarios.
CTC Hainan data showed that in hot, humid conditions, HJT modules produced 2.95% more power per kilowatt than TOPCon on concrete and 2.19% more on grass. Empirical data, PVsyst simulations, and the GB/T 42766-2023 formula indicated that HJT’s power generation gain over TOPCon varies with the environment, generally higher by 1.03%-3.97%.
In the 9.2MWp Xuzhou Jiawang project, HJT modules saved 0.027 yuan/Wp on BOS costs and improved power output, increasing project returns and shortening the payback period. HJT modules generated 1233.6 hours annually, 12.6 hours more than TOPCon, increasing power generation by 1.1%. The project saw BOS cost savings of 0.027 yuan/Wp, power gain of 0.05 yuan/Wp, and initial investment savings of 0.077 yuan/Wp.
In other applications, Grand Sunergy’s HJT modules also showed improved efficiency and power gain over TOPCon. “The ultimate value in various scenarios is reducing electricity costs and increasing terminal revenue,” Zhang Wei said. “Distributed PV stations face challenges like project dispersion, high maintenance difficulty, and diverse capacity needs, requiring higher module performance. This drives Grand Sunergy to continuously upgrade HJT technology and expand application boundaries to meet diverse market demands.”
