Solar Module Assembly
Single solar cells are only useful, when only small amounts of energy are required. For larger quantities we have to organize PV cells in a way that allows them to be installed on a roof or a field. For an efficient PV system, a high quality solar module assembly is essential.
Solar module assembly and installations are the final parts of the overall manufacturing process of a photovoltaic system. The adequate assembly of solar modules is an important element of the process and can influence the effectiveness of a PV system significantly.
The assembly of solar modules, also called solar panels, mostly is carried out in the cell plant. As it is easier to transport smaller cells, and more complicated to transport heavy and bulky modules, it can also be done in smaller plants closer to the end market.
For the assembly of a solar module, cells are fused together to produce a string of cells. Several strings are then laminated between glass on top and a polymeric backing sheet on the bottom.
The Frame – An Important Support Structure of Solar Modules
Solar modules are usually put into a frame, which is made of aluminum. There it is important that high quality standards are upheld. A panel in a loose frame could fall out, and not being as waterproof as high quality panels, could affect the whole system. Therefore it is important to buy high quality solar modules and let the installation of a solar array be done by professional installers.
Source: National Renewable Energy Laboratory
Glass for Protection of Solar Modules
Another important quality aspect is the glass of a solar module. Quality glass is made at high pressure and sustains more stresses and strains, like the weight of a person standing on it. It should be thick and rigid enough to avoid fractures and other damages when being carried or installed. An anti-reflective layer avoids disturbing reflection of sun rays. The quality of solar module glass also has an affect on the module efficiency, as the clarity of a quality glass can generate some extra Watts.