How does the double-sided double-glass N-type monocrystalline solar photovoltaic module enhance its resistance to mechanical loads and wind pressure?
Publish Time: 2025-10-09
In complex application scenarios such as large-scale ground-based power plants, offshore photovoltaic systems, high-wind pressure areas on plateaus, and industrial and commercial rooftops, solar photovoltaic modules must withstand not only long-term exposure to sunlight and rain, but also extreme mechanical stresses such as strong winds, snow accumulation, and hail. Traditional single-sided glass-backsheet modules are prone to backsheet cracking, solder ribbon fatigue, and latent crack propagation under long-term mechanical loads, impacting power generation performance and system life. The double-sided double-glass N-type monocrystalline solar photovoltaic module, with its unique structural design and material selection, significantly improves its resistance to mechanical loads and wind pressure, making it a key choice for high-reliability photovoltaic systems.1. Double-layer tempered glass provides high-strength structural supportThe core feature of double-sided double-glass modules is the use of double-layer tempered glass on the front and back, replacing the traditional backsheet. The tempered glass undergoes a high-temperature quenching process, forming a uniform compressive stress layer within. Together, the two layers form a sturdy "sandwich" structure. This symmetrical design not only improves overall rigidity but also effectively distributes external pressure, making the module less likely to deform or crack under static and dynamic loads.2. Symmetrical Structure Reduces Stress Concentration and BendingTraditional backsheet materials are made of organic polymers with a low elastic modulus. These materials are prone to bending and deformation under wind or snow pressure, causing uneven stress on the cells and leading to microcracks or hidden cracks. Bifacial double-glass modules, on the other hand, have glass on both the front and back, resulting in a consistent thermal expansion coefficient and a symmetrical structure. This allows for uniform deformation under load, significantly reducing stress concentration caused by material differences. Even under the periodic vibrations caused by strong winds, the module remains flat, effectively protecting the internal cells and solder ribbons and extending its service life.3. Excellent Wind and Snow Pressure ResistanceBifacial double-glass modules can withstand static loads exceeding 5400Pa for extended periods, making them suitable for use in high-altitude or cold regions. The high rigidity of the double-glazed panels effectively prevents the module from bulging or collapsing under strong wind suction, preventing seal failure and water intrusion.4. Enhanced Hail Impact ResistanceTempered glass inherently offers excellent impact resistance. The double-layer structure further enhances this resistance. Even if the front glass is partially damaged, the back glass maintains its structural integrity, preventing total module failure.5. Improved Long-Term Durability and Fatigue ResistanceUnder prolonged wind vibration, the backsheet of traditional modules is susceptible to aging and brittleness, and the solder ribbons are susceptible to metal fatigue from repeated bending. The glass material of bifacial double-glass modules is chemically stable and resists aging and yellowing. It also bonds firmly to the encapsulation material between the cells, forming a stable mechanical system that effectively inhibits the propagation of hidden cracks and power degradation. N-type monocrystalline cells inherently offer lower light-induced degradation and a lower temperature coefficient, further enhancing the system's long-term stability in harsh environments.6. Suitable for Harsh Installation EnvironmentsThe high strength of bifacial double-glass modules makes them suitable for a variety of challenging installation scenarios, such as ballasted installation on flat roofs, wind-resistant design on sloping roofs, and floating power plants. Their frameless design also reduces the risk of frame corrosion, improving overall durability.The double-sided double-glass N-type monocrystalline solar photovoltaic module significantly enhances its resistance to mechanical loads and wind pressure by utilizing double-layer tempered glass, a symmetrical structural design, and a high-reliability packaging process. Not only does it maintain structural integrity in extreme climate conditions, but it also reduces the risk of hidden cracks and power degradation, improving the long-term power generation revenue and operational safety of power plants. As the reliability and lifespan requirements of photovoltaic systems continue to increase, double-sided double-glass modules have become the preferred technology for large-scale photovoltaic projects and high-value applications.
