The output of the solar panel depends upon types of solar glass. Today, we discuss different types of solar glass which may affect the performance of solar output.
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1 ) Low iron solar textured solar glass
Features
- Low potential induced degradation (PID) leading to higher module output
- Higher transmission
- Lower iron content solar glass with 60 ppm
- Higher chemical durability
- Very high hydrolytic resistance and ability to cater requirement of larger modules like 96 cells and standard 72/60 cells module
- The full tempered glass is two times stronger than heat strengthened glass and 4 times stronger than annealed glass
- Mechanical strength over 180 mpa
- Safer to operate with compared to heat strengthened glass
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2 ) Solar Glass with Matt – Matt Finished
Features
- Matt finished on both sides
- Transmission up to 94% with appropriate AR coating
- The adhesion result ( Peel Test ) are much better as compared to standard requirement of 60 N / cm2 – 70 N / cm2.
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3 ) 2mm Fully Tempered Solar Glass
- Low cost ownership throughout the life of project in terms of higher mechanical strength, safety and longer life
- It is 2 times stronger than heat strengthened glass.
- Glass is safer and stronger than heat strengthened glass which leads to larger and sharper pieces when broken
- It is used for rooftops, safety glass for BIPV and claddings
- It is 35% lighter than traditional 3.2 mm glass so easy to handle and installations
- Frameless modules with glass have superior edge sealing leading to increased module life up to 40 years with no power losses.
- Higher reliability – reduce rate of module failure, use of laminated module in the rooftop
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4 ) NoSbEra : Antimony Free Solar Glass
- There is a burning issue due to antimony present in the glass. Antimony in the solar glass is toxic and causes skin and respiratory problems , interferes with gastro – intestinal functions, causes chromosomal damage in leucocytes, inhibits health production, possible carcinogenic to humans
- Each EV module has a front glass weighing about 16 kg and antimony content of 32 to 48 grams in it. Proportion of antimony in solar glass is typically 0.2% to 0.3%.
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5 ) Antiglare Solar Glass
- The antiglare solar glass has specially designed texture surface.
- It uses diffusion mechanism to diffuse the reflected light off the surface. It makes unwanted images does not focus to the eye and reduces their interference.
- When diffusion increases, less light reflected which eliminates the glare.
- The transmission of anti-glare glass is lower than that of non textured solar glass.
- The antiglare solar glass is suitable for PV installation near airport.
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6 ) Solar glass with anti reflective coating
- The transmission of anti reflective coated solar glass is beyond 94%.
- The anti reflection coating on solar glass consists of thin layer of dielectric material with special chosen thickness.
- The destructive interference of light and reflection depends upon refractive index ( RI ) of coating material and thickness of coating.
To
ensure maximum transmission, the solar glass manufactures ensure
- Coating material with right refractive index
- To ensure optimum thickness of coating
- Uniform coating
- Testing is done to ensure durability, refractivity and light transmission
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7 ) Solar glass with anti-soiling coating
- The solar modules tend to cause loss in energy production due to dust, moisture and also localized weather conditions.
- The solar glass with anti soiling coating soils is easier to clean.
- It also reduces cleaning cycle, labour charges to clean solar panels.
- The anti soiling coating improve direct performance and indirect maintenance saving.
Reference :
Borosil Renewable
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