Bifacial dual-glass solar panels utilize a specialized dual-glass encapsulation structure that differs significantly from traditional single-glass modules in terms of material composition and design. Their defining feature is the use of high-transmittance tempered glass for both the front and rear protective layers, with bifacial solar cells encapsulated in between; this configuration enables photoelectric conversion on both sides, thereby enhancing the utilization efficiency of solar resources.
The basic structure of a bifacial dual-glass solar panel typically consists of a front layer of tempered glass, an encapsulant film, solar cells, another layer of encapsulant film, a rear layer of tempered glass, a frame, and a junction box. By eliminating the traditional backsheet in favor of transparent rear glass, light can penetrate the back of the module and be absorbed by the cells, facilitating bifacial power generation. Simultaneously, the dual-glass design enhances the module's overall structural integrity, improving its resistance to wind pressure, impact, and environmental degradation, making it well-suited for long-term outdoor operation.
Regarding encapsulation, bifacial dual-glass modules typically employ EVA or POE films to protect the solar cells and bond the layers tightly together, minimizing the impact of moisture, dust, and external environmental factors on internal circuitry. Compared to modules using traditional backsheets, glass offers superior barrier properties, effectively mitigating performance degradation caused by moisture ingress. Furthermore, the dual-glass structure exhibits lower power degradation characteristics, maintaining stable power generation capabilities over extended periods of use.
The structural design of bifacial dual-glass solar panels also prioritizes ease of installation and system reliability. The module frames are usually made of corrosion-resistant aluminum alloy to boost mechanical strength and facilitate secure mounting, while the junction box manages power collection and output, utilizing bypass diodes to reduce the risk of hot spots caused by partial shading. Overall, bifacial dual-glass solar panels offer structural advantages such as bifacial light absorption, high reliability, robust durability, and a long service life, representing a key development trend in high-efficiency photovoltaic modules.