Monocrystalline vs Polycrystalline photovoltaic types of solar panel cells. They are the most common types. These are so-called multi crystalline silicon panels have cells made of silicon. Silicon is richly present on this earth, especially in sand. They come in two forms, mono and polycrystalline solar cells. The production process makes the difference whether they are mono or poly cells.
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The manufacture of polycrystalline cells, is melting silicon at a temperature of 1500 degrees. During cooling, crystals arise which are criss-cross. After cooling they cut slices from this product for usable PV modules.
For mono cells the cooling takes place in a controlled manner. So that the crystals all have the same direction. As a result, the mono cells look organised.
On the other hand, there is almost none difference per WattPiek . You will be able to place more modules on the same surface, with mono types, than with poly types. In other words, an installation with mono panels will be more compact than with poly cells. Whoever has a small roof can benefit from these pv cells. For those who have sufficient roof space, it does not matter which type of panel comes on. For every 1000 Wp (= 1kWp) an installation delivers about 850 kWh.
Monocrystalline cells are made according to the Czochralski process. The silicon is melt in a special oven. When it is hot enough, a special stick is hung up. On this stick is a piece of silicon on which the molten silicon will attach itself. The silicon will form a structure and growth. The way to create a massive round rod of silicon, they redraw the stick slowly from the silicon bath. Through the production process, all crystals are in the same line and form.
Monocrystalline vs Polycrystalline panels
Monocrystalline have a rather dark colour, against the black. Polycrystalline silicon modules have a more blue-purple hue. The intensity of the colour also depends on the manner of treatment and can, therefore, vary per panel.
Monocrystalline photovoltaic modules have a more even structure and therefore appear smoother. Polycrystalline PV panels have a more varied structure.
Because more polycrystalline cells made and the manufacturing process is cheaper. Manufacturers have been able to significantly improve this process. The difference is minimal nowadays.
Monocrystalline and polycrystalline solar panels are different of structure, monocrystalline photovoltaic cells are more sensitive to direct sunlight and poly more to diffuse light conditions.
Polycrystalline cells are square, and monocrystalline cells usually have rounded corners. Monocrystalline solar panels therefore often have those white dots in the panels. Nowadays there are also perfectly square monocrystalline cells.
With standard test conditions they mesure the solar power of a panel. With a light intensity of 1000 Watt per m2 and a temperature of 25 degrees celcius. As soon as this conditions change, the performance is different. Mono cilicon produce more energy than poly, compared unther the same conditions. Another critical difference is the module efficiency. For a poly cell it is between 14% and 16% and of mono cell between 15% and 18%.
We see more significant differences in thin film or amorphous panels. These are very light compare to other mono- and polycrystalline, and are also cheaper per Watt peak. Thin film solar panels have much lower efficiency. That is why thin-film panels are more suitable for use on large roofs or field systems. Thin film cells perform better in low light conditions or very high temperatures. Thin film modules have a more favourable temperature coefficient compared to the other types.
Preventing degradation and prolonging the lifespan comes with an apparently simple answer: glass. Glass is extremely durable, strong, completely impermeable, resistant to extreme weather conditions and chemicals.
Glass in glass panels belongs to the new generation. The experts are saying that glass in glass is better than its predecessors. There is less degradation, and it will give it a higher yield guarantee and a longer lifespan. In contrast to the regular PV modules, "glass in glass" consist of two layers of glass. The result: cells are better packaged. This makes them stronger and more stable.
You can use it longer because they are better resistant to all weather conditions, moisture and chemicals. According to the manufacturers, these panels yield 25% more output than the traditional. Glass in glass is a lot more expensive than the other types. However, it is also very profitable so that you have earned back the investment quickly. The higher panel purchase price is therefore justifiable because you will earn more than return.
There is a new generation of green energy cells ready to conquer the market. They are 'organic'. The carbon part is generating electricity, not silicone! For a long time, they were not efficient enough, but that has now changed. The renewable energy sector is the future and is making technological progress every day. The 'organic' panels are more ecological to produce, and recently their efficiency has become profitable.
The new solar panels use the same technique as they are using to produce the classic modules. A light absorbing layer captures the sunlight and converts it into energy. The carbon part is generating electricity, not silicone!
Why do not we use those new photovoltaic panels for a long time? Because they do not achieve the same efficiency as the photovoltaic cells that we use now. Our current panels generate 15 to 22% of the collected sunlight in energy. In a recent test they have reached up to 15%. A new study makes high efficiency of 17% possible. Scientists have the conviction that they will reach up to higher efficiency of 25 procent.