Re-yingcai® Hydrophobic Nano Self-Cleaning Coating for Solar Panels is a PV-specific protective treatment independently developed by Dongguan Yingcai New Material. Its inorganic nanosilica hydrophobic system cures at room temperature to form an ultra-thin transparent film. A strong lotus-leaf effect allows rainwater to remove dust, alkaline deposits, sand and mud automatically, substantially reducing manual cleaning costs. The film offers long-term UV and weather resistance without compromising PV glass light transmission or power output and is suitable for protective refurbishment of solar panels in desert, coastal, agrivoltaic, commercial and industrial distributed installations.
Product Features
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Self-Cleaning & Dust RemovalA micro-nanostructured superhydrophobic surface allows rolling droplets to carry away dust and improve the panel’s self-cleaning performance.
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Superhydrophobic PerformanceA water contact angle above 150° creates a lotus-leaf effect, causing near-spherical droplets to roll rapidly and remove surface dust.
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Dust and Contaminant ResistanceSurface energy below 20 mN/m makes it difficult for dust, pollen and other contaminants to adhere.
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High Light TransmittanceVisible-light transmittance loss below 2% helps ensure that PV light-absorption efficiency is not adversely affected.
Product Parameters
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Product Model YCB02003G Solid Content 10±1% pH Value 6.0–7.8 Abrasion Resistance 25,000 washing cycles Light Transmittance Gain 4.2%–4.8% Pencil Hardness 5H Application Method Spray or roller coating at room temperature
Superhydrophobic Surface
Nanoscale surface roughness and low-surface-energy materials work together to create an extreme water contact angle above 150°. Droplets remain nearly spherical, greatly reducing the solid-liquid contact area and making contaminants difficult to attach. Light rain or morning dew rolls away rapidly under high surface tension and carries dust, bird droppings and other particles from the panel, substantially reducing manual cleaning frequency.
Self-Driven Cleaning
Gravity and wind provide zero-energy cleaning. On inclined PV panels, a slope above 3° is sufficient to trigger self-driven droplet movement. Rolling droplets produce a broom-like physical washing effect that lifts contaminants. Tests show that rainfall at 2 mm/min can remove more than 90% of loose dust, significantly reducing O&M costs and maintaining long-term power-generation efficiency.
Long-Term Light-Transmittance Retention
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The nano coating remains below 200 nm thick and limits visible-light transmittance loss to less than 3%. Its hierarchical micro-nanostructure reduces light scattering and avoids surface scratches associated with conventional cleaning. After 2,000 hours of accelerated UV aging, transmittance degradation is 47% lower than on uncoated panels, helping preserve light capture throughout the module lifecycle.
Long-Lasting Protection
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An inorganic-organic hybrid material system improves weather resistance by more than five times. Nanoparticles bond covalently to the substrate and resist sand impact at wind speeds of 15 m/s. After 500 steel-wool abrasion cycles, the water contact angle remains above 145°. Resistance to acid rain and salt spray helps extend solar-panel service life beyond 25 years.
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