Solar panels are growing in popularity these days; however, not everyone is aware of the details of the working of one. Solar panels help convert solar energy into electricity for us to use. The way this works is that solar panels (solar modules) are connected in series and parallel to form a solar array.
This is done with the help of an electrical circuit. Each solar module consists of a large number of solar cells. It is essentially a semiconductor device that helps convert solar energy generated with the help of the sun into DC electricity. They are extremely fragile and hence need to be protected.
This article describes the working of a solar panel and stresses the importance of solar cell encapsulation and using EVA (Ethylene Vinyl Acetate) for the purpose of encapsulation.It is a must-read for those searching for an EVA foam sheet manufacturer in India.
Solar Panels Parts
A solar panel consists of a large number of solar cells. It is essentially silicon which is a material that is available in abundance. It is the natural property of silicon to be able to absorb energy from the sun and convert it into electron energy. The conductor has an ability to use the energy being generated (in the form of electrons between the layers of silicon).
The main parts of a solar panel include solar cells and many other sections as listed here:
- Junction Box
- Solar Cells
The frame is made of anodized aluminium and provides the structural form of a panel. It is easy to install and protects the panel from harsh weather conditions. The glass is placed on top of a panel to ensure the maximum amount of sunlight reaches these cells. There are two layers of encapsulations. There are two EVA (Ethylene-vinyl acetate) layers that bind all components of a panel. The main purpose of these two EVA layers is to protect the cells from water, dirt and other harmful elements.
The solar cells are the main section of any solar panel since help convert solar energy into electricity. In addition to the 2 layers of encapsulation, there is also backsheet protect the back of the module. This is an electrically neutral backsheet to prevent water and dirt from entering the panel. The purpose of a junction box is to transfer all the electricity produced by these cells with the help of cables and connectors.
What is Solar Cell Encapsulation?
They are very thin hence needing appropriate protection to prevent them from being damaged. A solar module consists of many solar cells to generate the right amount of electricity from solar energy. Thus, all these cells require an appropriate level of protection to ensure proper functioning. The solar cells are thus protected using encapsulation. The solar cells are exposed to all weather conditions since it is necessary to keep them direct contact of the sun. The encapsulation protects them from the harsh environment it is exposed too.
Benefits of encapsulating Solar Cells
The encapsulation helps protect against harsh weather, mechanical damage, and prevent corrosion. The danger from corrosion exists since there are several wires to interconnect the solar cells and they too are exposed to water and harsh weather. This encapsulation is very effective and helps the solar modules last long. Solar modules tend to last over 20 years and provide a high level of efficiency during that period; this gives a good idea of how effective the encapsulation needs to be. Thus, it is essential to make sure to use a good EVA sheet manufacturer in India.