Photovoltaic modules are exposed to several environmental stress factors including ultraviolet (UV) radiation during their lifetimes. Polymeric materials are used to encapsulate the solar cells, thereby providing them with electrical insulation and protection against mechanical stress and environmental corrosion. However, the polymeric encapsulates are themselves degraded by terrestrial UV radiation in the form of UVa And UVb, which are the main factors responsible for the aging of exposed panels. UV also gradually damage the photovoltaic junctions and significantly reduce the PV lifetime.
Group M.A.M. have developed a coating stack which can reduce the UV exposure of the PV cell to less than 1% (or even <0,5%). The visible light transmission of the coating is >85%.
The unique UV filter stack can be applied on a PET film and can then be laminated with a UV stable film or coated with a UV stable chemical coating.
Light reflection from the PV top layer is an important source of energy loss.
The Group M.A.M. AR coating has excellent optical properties and can be applied on film for OEM or retrofit application. A two-layer AR stack accounts for 6 % of transparency gain.
Red: no AR coating Blue: present AR coating Green: new GMAM AR coating
This new multilayer laminate provides a unique combination of anti-soiling and UV protection properties, and is aimed at PV-modules in dry, dessert-like climates. Group M.A.M. anti-soiling multilayer brings direct performance improvement and indirect maintenance savings by reducing soiling losses from dust and dirt.
Reduction of contamination and erosion can be realized by adding this multilayer laminate of highly transparent films to the glass surface. Each time the surface becomes soiled or eroded the top film is torn away, exposing a new and clean film surface. As much as 10 combined films can be applied, resulting in a laminate of 150 µm thickness. Closest to the glass, even a UV filter film can be mounted as well.