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...
2023-06-12
DAH Solar Plans To Build 7GW TOPCon Silicon Wafer Solar Cell Manufacturing Base in Shanxi
On the morning of June 3, DAH Solar Co., Ltd., Jinzhong Development Zone Management Committee of Shanxi Transformation Comprehensive Reform Demonstration Zone, and China Three Gorges Corporation Shanxi Branch discussed the " DAH Solar 7GW high-efficiency N-type silicon wafer and solar cell production base project" reached the strategic cooperation and formally signed a contract. The project plans to build 7GW of high-efficiency N-type silicon wafers and 7GW of high-efficiency N-type solar cell production capacity, with a total investment of about 2 billion Yuan RMB.
Before the signing ceremony, project-related leaders visited and inspected DAH Solar’s headquarters base and DAH Solar’s TOPCon Manufacturing base. To have the meeting with Xie Shenheng the President of DAH Solar and Bian Chonglei, the CEO of DAH Solar Waiting for the leaders to hold a discussion on this strategic cooperation.
Xie Shenheng, the President of DAH Solar, indicated that DAH Solar's 7GW high-efficiency N-type silicon wafer and solar cell production base project is important for the company to deepen its industrial integration layout. The strategic cooperation between DAH Solar, Jinzhong Development Zone, and Three Gorges Group will further consolidate the company's strategic development foundation in the next five years, which improve the company's integrated industrial layout, and enhance the company's comprehensive competitiveness. The three parties will give full effort to their respective advantages, strengthen in-depth cooperation at the levels of industry, technology, and market, promote the high-quality development of the regional economy, jointly help the photovoltaic industry reduce costs and increase efficiency, and contribute to the achievement of the goal of carbon dioxide emission and carbon neutrality.