Photovoltaic or PV technology employs solar cells or solar photovoltaic arrays to convert energy from the sun into electricity. Solar cells produce direct current electricity from the sun’s rays, which can be used to power equipment or to recharge batteries. Many pocket calculators incorporate a single solar cell, but for larger applications, cells are generally grouped together to form PV modules that are in turn arranged in solar arrays. There are several types of PV modules but According to the climate and geographical location of Pakistan most common and efficient solar cells are Mono-Crystalline solar cells and Poly-Crystalline solar cells.

 Mono-Crystalline Solar Cells
.each module is made from a single silicon crystal, and is more efficient, though more expensive, than the newer and cheaper PV panel technologies.  You can typically recognize them by their color which is typically black or iridescent blue.

Poly-Crystalline Solar Cells
A polycrystalline solar panel module is made from a block of silicon that has multiple crystals.  These panels are square in shape, and may have a surface that looks somewhat like a mosaic.  That’s because of all the different crystals that make up the module Polycrystalline solar panel modules could put solar power into the hands of people who could not afford the monocrystalline cells.

Mono-crystalline Vs Poly-Crystalline


Mono-crystalline solar cells cost more than polycrystalline for the same size.


Mono-crystalline cells have a higher efficiency than polycrystalline cells due to the structure being made from one large crystal as opposed to many small ones.  In addition to having an overall better efficiency, mono-crystalline panels can perform up to 10% better than polycrystalline panels in high ambient temperatures.


Since mono-crystalline panels are more efficient per area, the size of the solar panel is less than a polycrystalline solar panel for the same wattage.  If you are limited on size and want to get the most energy possible, mono-crystalline panels are the better choice. 


In terms of looks, mono-crystalline panels have a nice uniform color and have a more circular cell shape.  Polycrystalline cells are in squares and have inconsistencies in the color sort of like granite. 


Even though a mono-crystalline panel has the potential to last up to 50 years, most warranties only go up to 25 years which polycrystalline panels are able to reach just fine.

Overall, the production process for monocrystalline silicon is mature, and the process for polycrystalline in still maturing. As purity and process tolerances for polycrystalline Si improves, the performance gaps between the two are narrowing.


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