Solar cells are the main component of a solar panel, in this short post I am going to answer a few common questions about them.
What is a solar cell?
A solar cell, also called a photovoltaic cell, is any device that directly converts the energy of light into electrical energy through the photovoltaic effect.
What is a solar panel?
A solar panel is a device that collects sunlight and converts it into an electric current.
How does a solar panel work?
Solar panels contain solar cells, solar cells are made of layers of silicon, a semiconductor material made from sand.
When the photons of light enter a solar cell, they get absorbed and excite electrons in the silicon layers causing them to move and ultimately flow continuously through a circuit of wiring that feeds in the solar panel system. Harnessing this electron flow is what gives you electrical power.
What is the size of a solar cell?
Each solar cell typically measures about 4 to 6 square inches.
How many solar cells does each solar panel contain?
A full-size solar panel usually has 60 to 72 interconnected solar cells.
What material solar cells are made of?
Solar cells are commonly made of crystalline silicon (C-Si) and each one produces about 0.5 Volts of electricity, that is one of the reasons why we need to have many of them to produce higher voltage per solar panel.
To produce 30 volts you will need 60 solar cells and to produce 36 Volts you will need 72 solar cells, depending on a solar panel voltage requirement the manufacturer can decide how many solar cells they are going to use on that solar panel.
Why solar cells are assembled together?
There are two main reasons why solar cells are assembled together, let’s take a look at these two reasons.
1) You need a lot of cells to produce useful electricity
Each solar cell produces about 0.5 Volts, you need a lot of cells wired together to produce a useful amount of electricity.
2) Solar cells a fragile
Solar cells especially crystalline cells are fragile, assembling them in a structure protects them from rain, snow, wind, hail, etc.
That is it, that is the short introduction to the solar cells, these are the main component that builds the solar panel, in case you have any other questions let me know in the comment section below.