DAH Solar’s Full-Screen Technology Demonstrates 11% Energy Gain for Solar PV Modules As frameless PV modules are gradually becoming a mainstream trend in the industry, PV magazine had an interview with DAH Solar’s R&D Director, Dr. Jiang Chengyin, about the company’s design for its 3.0 Full-Screen product version further improves energy yield while lowering costs and reducing the likelihood of fractures. What is the “Full-Screen” technology for solar modules? Dr. Jiang Chengyin: Regular solar modules have frames that protrude above the glass surface, causing dust to accumulate since rainwater can't flow off quickly. Through our patented design, we ensure the frame is flush with the surface, allowing rainwater to smoothly run off and carry away dust, achieving a self-cleaning effect. Based on outdoor performance tests, at an installation angle of around 5 degrees, which simulates the typical installation angle on most domestic color steel tile roofs, our Full-Screen modules can achieve an annual energy gain of approximately 11%. With the elimination of traditional aluminum frame wrapping, can the Full-Screen's flat edge design meet structural rigidity requirements? How does it withstand long-term outdoor sealing performance? Dr. Jiang Chengyin: Originally, double-glass modules had no frames. With encapsulation of double-sided strengthened glass fully meeting the module's strength requirements. Adding frame designs primarily protected glass edges from damage. Since the distance from the internal cell's conductive part to the module edge is generally over 15 mm, the waterproof sealing insulation width at the edge is also 15 mm, ensuring long-term outdoor sealing. DAH Solar's design eliminates the front frame but retains side and back frames, bonded with high-strength silicone rubber, maintaining glass edge protection. Silicone rubber offers proven durability and weather resistance. What improvements does DAH Solar's Full-Screen product at this SNEC exhibit offer compared to previous models? Dr. Jiang Chengyin: Our Full-Screen product has advanced to version 3.0, which is a significant improvement over versions 1.0 and 2.0. First, we have adopted the Full-Screen plus “Dense Busbar” (DBB), which is a design similar to 0BB. DBB technology has several advantages, notably significantly reducing silver consumption during cell production, lowering product costs. Additionally, in module production, we've abandoned high-temperature welding processes, using low-temperature film to bond ribbons to cell surfaces. This low-temperature encapsulation process enhances module power, reduces virtual welding and the likelihood of fractures, improves yield, and extends product life by avoiding flux residues that corrode grid lines. Overall, version 3.0 products show significant improvements in reliability and power generation compared to past versions. Furthermore, we now use industry-leading rectangular silicon wafers based on 182 mm as the substrate for TOPCon ce...
2023-12-05
8.09% More Power Generation！DAHSolar Full-Screen PV Module Report of XuanCheng 1.04MW Power Station
Power Generation Report from the first three quarters of 2023 for the 1.04MW Full-Screen module photovoltaic power station constructed by Anhui Zhongyi Electric Power Environmental Protection Equipment Co., Ltd. (referred to as Zhongyi Electric Power) Park located in Langxi Economic Development Zone, Xuancheng City, Anhui Province was released. The average power generation gain per watt of the Full-Screen module is 8.09% higher than that of Regular modules!
Project Overview
The project is located in Xuancheng City, Anhui Province, in a mid latitude region, with a subtropical humid monsoon climate and distinct seasons. The average annual power generation is about 1020 hours (the smaller the inclination angle of the photovoltaic power station installation, the shorter the available sunpower hours), and the average annual temperature is 15.6 ° C. It belongs to the category III development area of solar energy resources, and the development value of solar energy resources is good.
Project Design
The 1st phase of the project is connected to the grid with a capacity of 1.04MW, using a total of 1932 photovoltaic modules, using DAH Solar Full-Screen modules(540W, 182mm/72 pieces), as well as regular modules (same 540W, 182mm/72 pieces). The inverter uses Sungrow 100kW series inverter, with a total of 9 units. The project sets up distribution cabinets according to the grid connection points, with 10kV outgoing lines. The components are laid flat on the colored steel tiles of the factory building using crossbeam guide rails, and the installation angle is 5 °. The full screen component is installed in the same way as the regular component, using fixtures to fix it and equipped with EPDM gaskets to prevent scratching the front glass of the component when installing the pressure block. The power station was integrated into the power grid on September 27, 2022.
Power Generation Results
In the first three quarters of 2023, the cumulative power generation of the power station was 890896.1kWh, of which the Full-Screen PV Module power generation was 512188.1kWh, and the average daily equivalent hours were 3.22h; The power generation of Regular Module is 378708kWh, and the average daily equivalent hours are 3.02h. At present, all operational indicators of the power station meet the empirical requirements. This is due to the fact that the Full-Screen PV Modules do not accumulate water or dust, resulting in better power generation performance. The data from the report shows that the average power generation gain of Full-Screen PV Module reaches 8.09%.
The front-side of DAH Solar Full-Screen PV Modules has frameless design, greatly improving the drainage and sewage capacity of the modules, and reducing the power generation loss caused by dust accumulation and obstruction. At the same time, without manual cleaning, the Full-Screen PV Modules are still very clean and do not require cleaning, operation, and maintenance; However, a thick ash accumulation zone has formed at the bottom of the Full-Screen PV Modules, greatly affecting the efficiency of power generation and the overall revenue of the power station. In addition, as the accumulation of dust and obstruction increases, it is more likely to cause local temperature increases and generate hot spots, affecting power generation efficiency and module’s lifespan. It can be foreseen that the relative advantage of Full-Screen PV Module in power generation gain will also be further highlighted.
Global Technology Leading PV Enterprise DAH Solar Co., Ltd. focuses on the R&D, manufacturing, and sales of high-efficiency power generation PV modules, integrated PV systems, and solar energy storage systems. DAH Solar committees to provide better solar solutions innovatively. With more and more needs for clean energy, DAH Solar continues to bring a more efficient, convenient, and reliable series of PV products to global users. Technological innovation and patented products With our leading technological innovation and excellent product quality, we enable global users more conveniently and stably to obtain efficient clean solar energy. We have 200 patented technologies used in our PV products. Our global patented product Full-Screen PV module achieves front A-side frameless design, which increases power generation by 6%-15% (field test result published by TUV Nord) compared to the regular PV modules. The world's first integrated PV system, SolarUnit, could maximize the installation area of the rooftop. SolarUnit made the integrated design of modules and inverters come true. SolarUnit provides users with a more efficient, convenient, safer, and beautiful residential PV system. SolarUnit promotes PV products in the era of home PV appliances. World Recognized PV Supplier DAH Solar's products have been sold in more than 100 countries and regions around the world. In Latin America, we have become the TOP 3 well-known PV companies in Brazil. In Europe, the demand for our innovative products, Full-Screen PV Modules, is exceeding supplies. Besides, to provide better service to global customers, we have established our warehouses in many countries and regions, like the EU stock in Rotterdam in the Netherlands. In addition, we have established very convenient purchase channels for global consumers. Customers can purchase DAH Solar’s products through distributors or official websites and E-commercial platforms. Social Responsibilities DAH Solar’s Solar Cells, Modules, and Inverters R&D and Production Factories Bases not only attract a large number of local high-end technical talents but also creates more than 2,000 job positions for local residents. Every year, we hold many social activities, such as donations to charities, responses to the Covid-19 pandemic, contributing to community growth, etc. to advocate for social development. Our ultimate goal is to embrace the era of clean energy to protect the environment and the behalf of mankind. Employee Development DAH Solar is committed to creating a better career development platform for our employees. We seek equity for all genders and ages in the workplace. DAH Solar offers our employees a free team-building trip, annually. We believe that refreshing is another path to creation. DAH Solar is also concerned about the health condition of our employees. That's why we provide our employees with free health checks and a full package of healthcare. At DAH Solar, we treat our employees not only as team assets but as our own families.
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