How can photovoltaic module manufacturers enhance the sand resistance of their products?

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Photovoltaic module manufacturers can enhance the sand resistance of their products from aspects such as material selection, structural design, production processes, and testing and certification. The following is a detailed introduction:

Material selection

Glass: High-strength and high-hardness ultra-white tempered glass is selected. Its Mohs hardness is usually around 6-7, which can effectively resist the impact of wind and sand. Meanwhile, increasing the thickness of the glass, such as from 3.2 millimeters to 4 millimeters or even thicker, can enhance the impact resistance of the glass.

Encapsulation materials: Use wear-resistant and aging-resistant encapsulation films, such as ethylene-vinyl acetate copolymer (EVA) films. By optimizing the formula and production process, enhance its adhesion and toughness, so that when the module is eroded by wind and sand, the film can better maintain its adhesion to the glass and solar cells, preventing delamination.

Frame: The frame is made of corrosion-resistant and high-strength aluminum alloy, and it undergoes special surface treatment, such as anodizing, to enhance its hardness and corrosion resistance. This effectively resists the wear and erosion of wind and sand on the frame, thereby extending the service life of the component.

Structural design

Optimize the surface structure: By designing microstructures on the surface of photovoltaic modules, such as using texturing or frosted treatment, the direct impact of wind and sand on the module surface is reduced, lowering the reflectivity while enhancing the sand resistance performance. In addition, the edges of the components should be designed in a rounded shape to avoid sharp corners and reduce the accumulation and wear of wind and sand at the corners.

Strengthen sealing design: Optimize the design of the junction box, frame sealing and other parts of the photovoltaic module, use high-performance sealant and sealing gasket to ensure the sealing performance of the module, prevent sand and dust from entering the interior of the module, and avoid affecting the performance and service life of the module.

Production process

Improve welding quality: Adopt advanced welding techniques and equipment to ensure that the welding between battery cells is firm and reliable, reduce the loosening and de-welding of welding points caused by wind, sand and vibration, and guarantee that the components can still maintain good electrical performance in harsh wind and sand environments.

Strengthening the packaging process: During the packaging process, strictly control the thickness and uniformity of the adhesive film laying to ensure that there are no bubbles or gaps inside the component, thereby enhancing the overall strength and sand resistance of the component. Meanwhile, the vacuum lamination process is adopted to closely bond materials such as glass, adhesive film, solar cells and backsheet together.

Testing and Certification

Simulated wind and sand testing: Establish a dedicated wind and sand simulation laboratory to simulate wind and sand environments with different wind speeds, sand and dust concentrations, and particle sizes, and conduct long-term sand resistance performance tests on photovoltaic modules. By monitoring the appearance changes of the components, electrical performance parameters, and the bonding performance of the packaging materials and other indicators, the anti-sand ability of the components is evaluated, and the products are optimized and improved based on the test results.

Certification and standard compliance: Photovoltaic module manufacturers actively participate in the relevant sand resistance performance certification and standard formulation work at home and abroad, such as the requirements for the mechanical load performance of photovoltaic modules in the IEC 61215 standard, as well as some special certification standards for specific wind-sand environment areas. Ensure that the products comply with relevant international and domestic standards to enhance their competitiveness and recognition in the market.