Photovoltaic modules, like technological products related to electronics, are constantly the subject of advanced research and progressive improvements, sometimes even with radical steps.
The dominance of mono cells
Mono-crystalline cells, which until 2018 shared the market equally with poly-crystalline ones, have quickly gained the upper hand with a share of 88% today on a market of about 130 GW.
![Cells_by_type](https://www.vpsolar.com/wp-content/uploads/2021/06/Cells_by_type.jpg)
The size of the cells
The cells of the photovoltaic modules used by manufacturers have now abandoned the classic size of 156 mm in favor of larger cells: the result is a greater power of the photovoltaic module (even 600-700 W) and greater efficiency.
In the design phase, the maximum current that the inverter must admit at the input must be taken into account, certainly greater than that of a traditional module.
The “overlapping” cells
Some leading companies in the production of photovoltaic modules have developed products with a particular technology for connecting the cells in series (called tiling or paving technology).
In practice, strips of cells are superimposed on each other for a small portion and welded with particular processes, thus obtaining the series of cells. The salient features are:
- less susceptibility to partial shading of photovoltaic panels;
- greater use of the module surface;
- greater resistance of the cell.
![Celle-tiling-o-paving](https://www.vpsolar.com/wp-content/uploads/2021/06/Celle-tiling-o-paving.jpg)
The transition to n-types
The most widespread technology among mono-crystalline cells is the p-type PERC, with a share of about 75%; also the n-type, always mono-crystalline, is seeing an important growth, with a share of about 14%, in continuous growth.
Many experts, using the indications of the manufacturers, estimate that between 2024 and 2027 the shift to n-type technology will take place to further increase the efficiency and power of photovoltaic modules.
![P-type-and-n-type-market---projections-in-percent](https://www.vpsolar.com/wp-content/uploads/2021/06/P-type-and-n-type-market-projections-in-percent.jpg)
For the photovoltaic modules that VP Solar distributes, the continuous improvement of efficiency and power are common factors, always maintaining a very high quality; for more information contact us by writing to [email protected].