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Double-sided solar panels are also known as bifacial solar panels. These have been in use since the early 1960s, but technological developments such as Passivated Emitter Rear Cell technology have boosted the performance of these solar panels by up to 40%. Because solar energy generates when the sun strikes the surface of a solar panel, double-sided solar panels operate more effectively. This is due to its ability to gather sunlight reflected from the ground even in cold weather conditions.

The glass normally protect the top of the solar panel, while the reverse side has a clear back sheet or glass. These translucent panels are thinner and frameless.

Solar panels with a traditional cell arrangement generate power exclusively from the front. However, one significant benefit of bifacial solar panels is that they take up less area. As a result, these are suitable for small-space homes. When positioned near reflecting surfaces, such as reflective roofs, bifacial solar panels perform best.

How does it function?

Bifacial solar
Bifacial solar Panels (Source New Scientist)

Bifacial solar, like classic one-sided solar, directly catches the sun’s rays while absorbing just specific wavelengths. Because the top solar cell silicon (the semiconductor), it often functions similarly to the solar cells of a traditional solar panel. When photons hit the upper surface of the solar cell and knock electrons free from particles, the solar panel generates an electric field, resulting in a flow of power.

Some of the sun’s beams travel straight through and strike the earth. If the ground has a high reflectance rate, however, it will bounce back toward the panel. The cells at the bottom of the bifacial panel collects the reflected light. Therefore, it is critical that the surface on which bifacial solar panels installed be highly reflective. Swimming pools, sand surfaces, and light-colored tiles and roofs are examples of surfaces. With a tracking system, bifacial modules can achieve up to 27 percent efficiency. They may achieve a remarkable 71 percent increase in energy output beyond latitudes of 65 degrees and above.

Bifacial solar panels track the sun might generate 35% more energy.

A team from Singapore’s Solar Energy Research Institute discovered that panels having photovoltaic cells on both sides. These have the ability to tilt to follow the sun will produce 35% more energy. Moreover, it is a great advantage on the average cost of power as it can reduce by 16%. Furthermore, Rodrguez-Gallegos suggests utilizing double-sided solar panels that can monitor the sun to increase efficiency even further. Bifacial solar trackers also follow the sun for a year, altering position based on the different seasons. This is because the sun’s elevation is higher in the summer and lower in the winter.

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