What are the main materials of solar panels?

What are the main materials of solar panels?
As the cleaner energy in the world, solar energy has entered the mainstream # solar panel #. We will let more people know the different manufacturing methods of solar panels and the main materials of solar panels. Most solar panels on the market include monocrystalline silicon solar panels, polycrystalline silicon solar panels and amorphous silicon solar panels.
What is the solar panel made of?

The materials used to make solar panels are only part of the solar panels. Common glass solar panels are made of 6 different parts. You can also DIY a solar charging panel according to this list. These components include silicon solar cells, metal frames, glass panels, standard 12V wires and buses.

Silicon solar cell (single crystal/polycrystalline/Sunpower)
Silicon solar cells use the photovoltaic effect to convert sunlight into electricity. The silicon battery is welded together between the glass plates in a matrix structure, and interacts with the thin glass plates to generate electric charges.

Glass plate (tempered glass)
The outside tempered glass is usually 6-7 mm thick (this is determined by the size of the solar panel). Although it is very thin, it plays a great role in protecting the silicon solar cells inside. At the same time, it also plays an important role in the power generation of solar panels, with high light transmittance.

Metal frame (usually aluminum alloy)
The metal frame of a solar panel has many uses; Prevent adverse weather conditions or other dangerous situations, and help adjust the installation of solar panels at the required angle.
In addition to the solar cell itself, a standard solar panel includes a glass shell in front of the panel to increase durability and protect the silicon PV. Under the glass shell, the battery panel has a shell for insulation and a protective back plate, which helps to limit the heat loss and humidity in the battery panel. The thermal insulation layer is particularly important because the increase in temperature will lead to the decrease in efficiency, thus reducing the output of solar panels
a bus or bus bar
The bus is used to connect parallel silicon solar cells. The bus is covered with a thin layer of solder, which is convenient for welding and is thick enough to carry current.

The five key steps for DIY to make glass solar panels are.
1. Making solar cells
2. Weld the solar cells together to form a panel
3. Install the back plate, front glass layer and frame
4. Install a junction box
5. Quality test
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