Description
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General Specifications about Solar Glass |
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Key Specifications |
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Solar Transmittance: |
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This refers to the percentage of solar radiation that passes through the glass. For standard solar glass, it’s often around 91% for a 3.2mm thickness. Anti-reflective coatings can increase this value, sometimes exceeding 93.6% for 3.2mm glass. |
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Thickness: |
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Standard solar glass is often 3.2mm thick, but it can range from 2.5mm to 10mm, with 4mm being another common thickness. |
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Iron Content: |
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Low iron content (often less than 120ppm or 0.012%) minimizes the greenish tint and maximizes light transmission. |
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Properties: |
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Mechanical Properties: |
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Tensile Strength: Typically, around 42 MPa. |
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Young’s Modulus of Elasticity: About 73 GPa. |
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Other Properties: |
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Density: Approximately 2.5 g/cc. |
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Expansion Coefficient: 9.03 x 10⁻⁶ /℃. |
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Hemispherical Emissivity: Typically, around 0.84 |
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Glass Type: |
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Commonly used types include tempered glass (most popular and cost-effective), soda-lime glass, and borosilicate glass. |
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Additional Considerations: |
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Anti-Reflective Coatings: These coatings reduce surface reflection, further enhancing light transmission. |
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Durability and Strength: Solar glass needs to withstand various environmental factors like wind, rain, and temperature fluctuations. |
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Specific Applications: Solar glass can be used in various applications beyond standard solar panels, including building-integrated photovoltaics (BIPV) where transparency and |
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Examples of specifications for some types of Solar Glass |
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Tempered Low-Iron Glass for PV Modules |
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Technical Specification |
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Parameter |
Specification |
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Glass Type |
Low-Iron Tempered Glass (Solar Grade) |
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Thickness |
2.0 mm, 2.5 mm, 3.2 mm (most common: 3.2 mm) |
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Dimensions |
Custom: e.g., 1640 × 992 mm (standard panel size) |
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Transmission (≥380 nm) |
≥ 91.5% (typically 91.5%–93.5%) |
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Iron Content (Fe2O3) |
≤ 120 ppm (to ensure low absorption and high clarity) |
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Surface Treatment |
Textured (Matte / Prismatic / AR Coated) |
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Anti-Reflective Coating |
Optional: single or double side AR coating |
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Tempering |
Physically tempered (safety and strength enhancement) |
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Solar Transmittance |
≥ 91% (AM 1.5 spectrum) |
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Haze |
1% – 10% (depending on texture, affects light diffusion) |
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Strength |
≥ 90 MPa (Mechanical Strength after tempering) |
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Thermal Endurance |
≥ 250°C |
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Self-Cleaning Coating |
Optional (hydrophilic/photocatalytic for dust resistance) |
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Edge Processing |
Ground or polished edges (to reduce microcracks) |
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Color |
Ultra-clear (low-iron) |
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Module Compatibility |
Crystalline silicon (c-Si), thin-film, BIPV, etc. |
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Standards Compliance |
IEC 61215, IEC 61730, EN12150-1, ISO9001 |
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Ultra Clear AR Coated Low Iron Glass |
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Technical Specification |
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Specification |
Value |
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Thickness |
2mm, 2.5mm, 3.2mm and 4mm |
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Size |
Min size 50*50mm, Max size 2140*3300mm, |
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Further Process |
Cleaning, cutting, rough grinding, hole, printing etc. |
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Surface |
Mistlite single pattern or flat or AR coated |
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Visible light Transmittance |
91.60% without AR coating,93.6% with AR coating |
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Visible light reflectance |
7.30% |
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Solar Transmittance |
93% |
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Solar reflectance |
7.40% |
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UV transmittance |
86.80% |
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Total solar heat gain coefficient |
93.20% |
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Shading Coefficient |
1.04% Performance varied due to different thickness |
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Usage |
Solar power generator, solar panel,water heater etc. |
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Specification |
Value |
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AR Tempered Glass |
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Technical Specification |
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Basic information |
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Glass type |
Super white, patterned. Rolled |
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Glass form |
Raw, Tempered,AR coated, Back print, Hole drilling |
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Glass thickness |
3.2mm, 2.0mm,4.0mm，2.5mm |
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Applicable size |
1298 X 2500mm (210 solar cell) 1128 X 2500mm (182 solar cell) 1033 X 2500mm (166 solar cell) 996 X 2500mm (158.75 solar cell) 986 X 2500mm (157 solar cell) |
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OPTICAL PROPERTY |
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Reflectance |
7.6% |
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Transmittance Rate of PV Glass |
>91.6% |
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Transmittance Rate of ARC PV Glass |
94.5% |
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THERMAL PROPERTY |
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Expansion Co-efficiency Linear in the range of 20°C-300℃ |
8.64X10-6 |
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Specific Heat |
0.2J/0.2J/Kg.K |
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Calculated thermal conductivity at 20℃ |
1.0W/mK |
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Softening Point |
743.3℃ |
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Annealing point |
577℃ |
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Strain point |
537.4℃ |
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MECHANICAL PROPERTY |
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Mohs’ (scratch) hardness |
5 |
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Knoop Harness number |
470 |
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Poisson’s ratio |
0.217 |
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Density |
2.4872g/cm³ |
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(Young’s) Modulus of |
70.000N/mm² |
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Tensile Strength |
25N/mm² |
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Compressive Strength |
700-900N/mm² |
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Mechanical strength |
90N/mm² |
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