If ipawhite S is additionally coated with iplus HT, the reduction in reflection further increases the transmittance of the glass surface. The increase in energy transmittance of 5% compared with uncoated glass automatically leads to a higher yield of solar energy.
A further advantage of iplus HT lies in the low dependence of the coating on the angle of incidence of the sunlight. This increases transmittance, especially in the early morning and evening as well as during the winter months, when there are low levels of solar radiation.
The market for photovoltaics is dominated by crystalline technology. In the modules, solar cells are joined to form strings, which are then laminated between two films and fitted with a glass cover. The glass protects the module from humidity and other environmental influences and also provides stability and strength for the brittle solar cells. The latest developments of glass-glass modules indicate that because of its stability and impermeability glass is replacing the commonly used Tedlar films for the construction of the module back in more and more cases.
For glass-glass modules, the glass thickness is reduced to 3 mm. In thin-film technology solar modules are manufactured using various coating processes. Here, glass plays a doubly important role. The modules consist of two glass panes and function like laminated glass. The module cover glass is a decisive factor for the efficiency of the module. Therefore, the glass must have the highest possible transmittance. In contrast to solar thermal applications, however, depending on the technology, only the wavelengths between 300 nm and 1200 nm (TePV) play a role.