Manufacture of solar panels. Image: Humphery Shutterstock

Solar energy is increasing its competitiveness by leaps and bounds. The success of the industry is supported by lower production costs and improved efficiency of solar cells.

Buying a solar panel today is 81% cheaper than 10 years ago.

The increase in demand and sales, as well as the increase in the companies that market them, contribute with technology to lower prices.

Benefits of PERC technology.

Photovoltaic solar panels consist of three hats and each of them has its respective electrical properties. The emitting layer is more exposed to radiation. The base layer is an intermediate layer of silicon and finally there is the aluminum base.

Progress points to the use of a reflective layer that makes the most of solar radiation. A passive dielectric material is used between the silicon base layer and the aluminum layer.

This allows the infrared light not to reach the aluminum layer but to be reflective and generate electricity.

This way you have a superior efficiency to the rest of the conventional modules existing on the market.

Light has wavelengths greater than infrared which do not have the ability to penetrate photovoltaic cells and generate energy. However, they are able to heat the aluminum layer in conventional panels, increase the temperature of the module.

In PERC cells, these types of waves are reflected and sent out of the panel. This way you get lower temperature, improving efficiency.

Another advantage of dielectric material is that it is bonded to electrons. Prevents them from escaping into the aluminum layer and improves circulation between the silicon emitting layer and the base layer.

The 60-cell PERC modules are expected to have a capacity of 325W for polysilicon, 345W for single crystal P-type and 350W for N-type in 2029.

Cost reduction.

There are new methods to implement cImproved and larger silicon cells. Improvements were also made to the front and rear surfaces. The concept of solar cells is even developed bi-facials.

Constant innovation in solar energy.

According to the International Technology Roadmap for Photovoltaic report (ITRPV), constant innovation, the implementation of PERC technology and other improvements, as well as the improvement of the materials used, have contributed to a Efficiency increase of 23%.

Solar energy is undoubtedly one of the energies of the future.