In today's rapidly diversifying solar landscape, technology differentiation tailored to specific application markets has become a defining measure of a company's overall strength. back-contact (BC) technology, known for its high front-side conversion efficiency and clean aesthetics, is showing enormous potential in segments such as building-integrated photovoltaics (BIPV).
As PV technologies and application scenarios converge, BC is emerging as a new driver of market specialization. Leveraging its forward-looking "One Core, Three Branches" R&D strategy, deep expertise in TOPCon, and strong innovation capabilities, DAS Solar combined advanced passivated contact technology with back-contact architecture to establish its proprietary DBC (DAON-BC) platform. Through continuous iterations, the technology has advanced from DBC 1.0 to DBC 3.0 Plus, achieving a certified conversion efficiency of 27.77% by third-party testing—evidence of its potential to lead the next phase of industry development.
Reliable Patents: Building a Protective Moat
Patents serve as both the outcome of innovation and a vital competitive advantage. DAS Solar has established a robust and multi-layered patent strategy around DBC, creating a complete matrix spanning fundamental R&D, structural innovation, and practical applications. To date, the company has filed or secured 83 patents related to DBC, including 75 invention patents, covering all aspects of design, process optimization, and application. This broad portfolio safeguards the company's proprietary breakthroughs, while also ensuring efficiency gains and cost reductions can be achieved as the technology moves toward mass production. It forms a strong technical barrier that underpins DAS Solar's leadership in a competitive market.
Standards Leadership: Shaping Industry Direction
Standards define the rules of an industry, and those who help shape them gain influence over its future. DAS Solar recognizes this importance and has been actively contributing to the development of BC cell standards, gradually positioning itself as a leader in this space. The company spearheaded the drafting of the Crystalline Silicon Back Contact Photovoltaic Cell Zhejiang Manufacturing standard, establishing a benchmark framework for BC products aligned with world-class quality. It also participated in drafting the CPIA group standard for crystalline silicon back-contact cells, now serving as a key reference for the sector. In addition, DAS Solar is leading the development of two SEMI international standards, such as the Specification for Welding Wire Masking Film for Back Contact Photovoltaic Modules, which are currently under review, further extending its influence to the global stage.
Technology Breakthroughs: Proving Ground for Innovation
If patents are the foundation and standards are the rules, national and provincial R&D initiatives are the proving grounds. DAS Solar has undertaken multiple flagship projects, including the National Key R&D Program on High-Reliability Crystalline Silicon Modules and Cell Manufacturing Technology, as well as Zhejiang Province's "Pioneer and Leading" initiative on Key Technology Development and Industrialization of TBC Solar Cells. These programs focus on solving key scientific and engineering challenges in DBC development. Partnering with universities and research institutes, DAS Solar has transformed theoretical innovations into practical advances, boosting conversion efficiency, enhancing reliability, and refining scalable manufacturing processes. The company's work has already pushed laboratory conversion efficiency to 27.77%, solidifying the basis for large-scale commercialization.
A Complete Loop of Intellectual Property
Patents, standards, and R&D projects may appear distinct, but together they form an integrated framework for innovation. At DAS Solar, patents provide the technical basis for new standards; standards translate innovations into industry consensus; and government-backed projects validate and accelerate real-world application. This three-dimensional synergy demonstrates that DAS Solar not only holds proprietary, original DBC technology but also possesses the ability to scale it effectively across industrial production.
With a record 27.77% cell efficiency and module outputs exceeding 670W, DAS Solar has shown both its innovation capacity and commercial readiness. Looking ahead, the company will continue to strengthen its R&D investment, expand its patent portfolio, drive standard-setting, and address key technological challenges, advancing the adoption of BC technology and contributing to the sustainable, high-quality growth of the solar industry.n today's rapidly diversifying solar landscape, technology differentiation tailored to specific application markets has become a defining measure of a company's overall strength. back-contact (BC) technology, known for its high front-side conversion efficiency and clean aesthetics, is showing enormous potential in segments such as building-integrated photovoltaics (BIPV).
