Technical FAQs 4

What is the transmittance of uncoated solar glass?

The transmittance of conventional uncoated solar glass at a vertical incidence of light is approximately 91%. The front reflects around 4%, around 4% on the back, and 1% absorption. In addition, there are double reflections within the glass, which is in the order of 0.2%.

What is solar energy direct transmittance (Te)?

Solar Energy Direct Transmittance (Te, %) is the percentage of incident solar energy in the wavelength range of 300 nm to 2500 nm that is directly transmitted by the glass. Solar Direct Reflectance Outdoors/Indoors (Re out/in, %) is the percentage of incident solar energy directly reflected by the glass.

Which material has the highest spectral transmittance of solar radiation?

This study analyse spectral transmission of solar radiation of glass and plastics. The 8 h transmittances are higher than at 12 h and are higher in winter than summer. Methacrylate and smoked glass have the highest transmittance in UV, VIS and NIR ranges. Polycarbonate has the lowest transmittance in UV, VIS and NIR ranges.

What is visible light transmittance?

Visible Light Transmittance (Tv, %) is the percentage of incident light in the wavelength range of 380 nm to 780 nm that is transmitted by the glass. Visible Light Outdoors/Indoors (Re out/in, %) is the percentage of incident solar energy directly reflected by the glass.

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Currently the transmittance of solar glass

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Solar Transmittance/Solar Reflectance

Dec 8, 2025 · JIS R3106 "Testing Method on Transmittance,Reflectance and Emittance of Flat Glasses and Evaluation of Solar Heat Gain Coefficient"

Transmittance measurements for the different

Aug 19, 2024 · The research shows that the transmittance of the glass thickness is less than 0.9 mm, undergone the chemical strengthening

[Solar Glass] Brighter Futures? Evaluation Of The Transmittance

Fraunhofer ISE has developed an evaluation procedure for the application of solar glass in PV modules based on angular dependent spectroscopic measurements of various, differently

Solar Transmittance

More info about Solar Glass – Optical Properties The efficiency of solar glass is evaluated using the following parameters: Optical transmission

Performance value terms

Solar Factor or Total Solar Energy Transmittance or g-value (g%) is the total solar radiation transmitted by the glass. Shading Coefficient (sc) is Solar

Solar Transmittance/Solar Reflectance Measurement

Dec 8, 2025 · JIS R3106 "Testing Method on Transmittance,Reflectance and Emittance of Flat Glasses and Evaluation of Solar Heat Gain Coefficient" JIS R3106 stipulates methods for

Solar Glass

Solar glass is a specialized low-iron, tempered soda-lime silicate glass, often enhanced with an anti-reflective coating. This combination delivers ultra-high light transmittance, superior

Solar Transmittance

More info about Solar Glass – Optical Properties The efficiency of solar glass is evaluated using the following parameters: Optical transmission Transmission measurement for wave-lengths in

Spectral transmission of solar radiation by plastic and glass

Jul 1, 2020 · In this paper we analyse the spectral transmission of solar radiation of widely used materials using the transmittance parameter. The measurements were performed on clear

Measurement of Solar Transmittance through Plate Glass

Dec 8, 2025 · UV-3600i Plus UV-VIS Spectrophotometer Solar transmittance is defined as the ratio of solar radiation perpendicularly incident on window glass that is transmitted through the

Impact of Different Types of Dust on Solar Glass Transmittance

May 26, 2025 · The transmittance of conventional uncoated solar glass at a vertical incidence of light is approximately 91%. The front reflects around 4%, around 4% on the back, and 1%

Transmittance measurements for the different type of glass

Aug 19, 2024 · The research shows that the transmittance of the glass thickness is less than 0.9 mm, undergone the chemical strengthening process, reaches 91-92% values in whole UV-VIS

Impact of Different Types of Dust on Solar

May 26, 2025 · The transmittance of conventional uncoated solar glass at a vertical incidence of light is approximately 91%. The front reflects around

Performance value terms

Solar Factor or Total Solar Energy Transmittance or g-value (g%) is the total solar radiation transmitted by the glass. Shading Coefficient (sc) is Solar Factor divided by 0.87. It is a

Measurement of Solar Transmittance through

Dec 8, 2025 · UV-3600i Plus UV-VIS Spectrophotometer Solar transmittance is defined as the ratio of solar radiation perpendicularly incident on

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