The smarter E: Féron introduces highly reflective black backsheet

Aluminium Féron GmbH & Co. KG from Düren, Germany is presenting a new black backsheet for solar modules at Intersolar. The polyolefin-based backsheet CPx w/b HR (High Reflectivity) is characterized by a particularly high reflection of incident sunlight, which, according to the manufacturer, is over 50 percent in the wavelength range from 800 to 1,200 nanometers, which is particularly relevant for crystalline solar cells. According to Féron, competitors are achieving only five percent in this range. By comparison, Féron's white back-sheet films reflect 90 percent of the incident light in the aforementioned wavelength range.
Since reflected light makes an object appear brighter, while absorbed light makes it appear darker, Féron's development seems a bit like squaring the circle. However, the company does not give any details about the physical background,
Depending on the type of cell used, the use of a black backsheet leads to yield losses of around one percent, as dark modules heat up more and the non-reflected light is missing for electricity production. Feron's new film now enables module manufacturers to reduce these losses. Measurements are currently being carried out to quantify them and are expected to be completed by Intersolar. Market launch is planned for the fourth quarter (Booth No. A2.212).

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