Generate your own electricity with Viessmann photovoltaic modules

The core of a photovoltaic system, or PV system for short, are the photovoltaic modules. They consist of a large number of solar cells. In each individual cell, the so-called photoelectric effect takes place, through which sunlight is converted into electrical energy. Different types of modules can be distinguished: the so-called monocrystalline and polycrystalline models. But how do they differ and for whom are which modules suitable?

Types, structure and function of PV modules

Basically, power generation in a photovoltaic module works via the differently doped levels in the solar cell. That is, whether monocrystalline or polycrystalline, the silicon atoms are in a stable crystal structure. During the production of the solar cells, foreign atoms are added. This leads to the presence of free electrons in the upper layer. Experts refer to this as the n-doped layer. In the lower layer of the cell, on the other hand, there are too few electrons (p-doped layer). Here one can also speak of positive charged holes.

In between lies the boundary layer. The electrons migrate from the top to the bottom to the free places - the p-n junction. If sunlight now hits the photovoltaic module, the electrons move back to the now unsaturated atoms in the upper n-layer. Metal contacts are located on the surface and on the back of the modules. These electrons are discharged via these contacts and fed into the circuit.

Mono- and polycrystalline modules

The production of photovoltaic modules is similar. Thus, the origin of both is the silicon melt. In the monocrystalline variant, however, single-crystal rods are drawn from the liquid silicon. This results in a particularly smooth surface. For polycrystalline modules, on the other hand, blocks are cast. During hardening, rather non-uniform crystals are formed here. They are then sawn into slices.

But it is not only in their manufacture that they differ. For example, the Vitovolt monocrystalline modules are all black and have an output of up to 325 Wp. The polycrystalline models are dark blue and achieve outputs of up to 285 Wp. Incidentally, Wp stands for watts peak and describes the maximum output under test conditions.

Special features of Viessmann Vitovolt photovoltaic modules

If you choose the Viessmann Vitovolt 300 models, you will benefit from the following advantages:

● high performance values
● uncompromising quality
● comprehensive product and performance guarantees
● Positive output tolerance in the as-delivered condition of up to 5 Wp
● for single and multi-family homes as well as for commercial and industrial applications
● optimal hotspot protection
● strong low-light performance
● films with excellent heat and aging resistance
● all-aluminum frame
● High-quality sealants with long-lasting adhesion