Photovoltaic Glass

Photovoltaic glass is a core encapsulation material for solar cells, multiple functions including light transmission, protection, insulation, and weather resistance, directly affecting module power generation efficiency and service life.

Core Functions

• High Light Transmittance: Every 1% increase in transmittance boosts module power by approximately 0.8%

• Mechanical Protection: Withstands wind load, hail impact, and mechanical shock

• Electrical Insulation: Ensures safe operation

• Weather Resistance: Resists UV radiation, high humidity, salt spray, etc., ensuring a 25-year lifespan

Main Types

Key Performance Indicators

• Light Transmittance: ≥91.5% (patterned), ≥93.5% (AR-coated)

• Iron Content: ≤0.015%, lower values yield better transmittance

• Mechanical Strength: Bending strength ≥120 MPa after tempering

• Weather Resistance: Damp heat testing for 1000+ hours

Core Applications
Ground-mounted power stations, distributed photovoltaics, Building Integrated Photovoltaics (BIPV), agrivoltaics, vehicle-integrated photovoltaics

Development Trends

• Thinner Formats: Evolving from 3.2mm to 2.0mm, 1.6mm

• Higher Transmittance: Double-layer AR coatings, targeting 95% transmittance

• Larger Sizes: Adapting to 182mm, 210mm large silicon wafers

• Functional Integration: Combining with colored coatings, self-cleaning, dimming, and other functions

Summary
Photovoltaic glass serves as the critical interface between sunlight and electricity. Evolving from a simple protective layer to a core technological material, its continuous advances in transmittance, strength, and durability provide essential support for cost reduction, efficiency improvement in the PV industry, and the widespread adoption of clean energy.