Self-cleaning and Anti-reflective Nanocoating Solution for Photovoltaic Modules

Aug 07,2025

1. Industry Pain Points
In the daily operation of photovoltaic power plants, photovoltaic modules face many challenges, among which dust accumulation, water stains, and static adsorption are particularly prominent. These issues not only significantly reduce the light transmittance of the modules but also increase the risk of hot spots, seriously affecting the power generation efficiency and operation and maintenance costs of the power plant. According to related studies, dust accumulation causes an average annual power generation loss of more than 15%, and even higher in some regions. Frequent manual cleaning consumes a large amount of manpower, material resources, and financial resources, and improper operation may damage the modules, further shortening their service life. In addition, in areas with little rainfall or drought, the scarcity of water resources also makes cleaning work difficult to carry out effectively.
2. Hisense Meike Solution
Leveraging its deep technical accumulation in the field of nano-coating materials, Hisense Meike has developed a self-cleaning, anti-dust nano-coating with enhanced transmittance suitable for photovoltaic modules. This coating uses an innovative "superhydrophilic + anti-static" nano-structure design to effectively suppress static adsorption of dust. Even in low-rainfall environments, it can achieve surface cleaning with minimal water, truly realizing "clean with rain, clean even on dry days." Meanwhile, the coating adopts a multi-layer anti-reflective and transmittance-enhancing structure design, optimizing the interface refractive index to maximize solar light incidence efficiency and enhance the overall power generation capacity of the modules. When facing harsh climates such as high temperature, strong ultraviolet rays, acid rain, and salt spray, the highly dense interface coating system ensures long-term stable performance, meeting industrial standards for outdoor use of more than 5 years.
3. Implementation Steps
Module Assessment: Before construction, conduct a comprehensive assessment of the photovoltaic modules' type, years of use, installation environment, etc., to determine the degree of surface contamination and damage, providing a basis for the subsequent construction plan. For modules with severe damage or aging, it is recommended to repair or replace them first to ensure the effectiveness of the coating application.
Surface Pretreatment: Use professional cleaning equipment and detergents to deeply clean the surface of the photovoltaic modules, removing dust, oil stains, rust, and other impurities. For stubborn stains, mild grinding or sandblasting may be used, but care must be taken to avoid excessive damage to the module surface. After cleaning, rinse thoroughly with deionized water and ensure the module surface is completely dry.
Coating Application: According to the specific condition of the modules, select an appropriate application method such as spraying or brushing. When spraying, professional spray gun equipment must be used, strictly controlling spray pressure, distance, and angle to ensure uniform coverage of the coating on the module surface. During application, apply multiple thin layers according to product instructions; each layer must dry and cure before applying the next to ensure coating thickness and quality.
Quality Inspection: After coating application, use various inspection methods to strictly test the coating quality, including thickness, adhesion, hardness, superhydrophilic performance, anti-static performance, and transmittance enhancement. Only modules meeting all standard requirements can be put into normal use. At the same time, establish a regular inspection mechanism to monitor the coating's condition, promptly identifying and addressing issues such as wear and peeling.
4. Expected Effects
Improved Power Generation Efficiency: By reducing the impact of dust and other contaminants on module light transmittance and optimizing solar light incidence efficiency, it is expected to increase the comprehensive power generation efficiency of photovoltaic modules by more than 5%, significantly boosting the power plant's output and revenue.
Reduced Operation and Maintenance Costs: Significantly reduce the frequency of manual cleaning, lowering cleaning costs and the risk of module damage caused by cleaning. It is expected to reduce cleaning frequency by more than 80%, saving substantial operation and maintenance costs over the entire lifecycle of the photovoltaic power plant.
Enhanced Module Durability: The coating's high density and weather resistance effectively protect the modules from environmental erosion, extending their service life. It is expected to extend the service life of photovoltaic modules by more than ten years, reducing module replacement costs and improving the long-term investment return of the power plant.
Improved Power Plant Stability: Reduce the occurrence of faults such as hot spots, ensuring stable operation of the photovoltaic power plant and improving the reliability of power supply.