Quick Answer
BACKSIDE ILLUMINATION WORKS BY ALLOWING LIGHT TO ENTER THE MODULE FROM BOTH THE FRONT AND BACK SIDES, INCREASING ENERGY PRODUCTION BY UP TO 25% UNDER OPTIMAL CONDITIONS, SUCH AS WHEN PARTIALLY SHADOWED OR UNDER DIFFUSED SKY CONDITIONS.
Functionality of Bifacial Cells
Bifacial cells utilize backside illumination to capture light that would otherwise be lost, increasing the overall efficiency of the system. This is achieved through the use of transparent or semi-transparent substrates on the back of the cells, which allow light to pass through and be absorbed by the photovoltaic material. The transparent substrate can be made of materials such as glass, polycarbonate, or even aluminum oxynitride.
Advantages of Bifacial Systems
Bifacial systems have several advantages over traditional single-sided systems, including increased energy production, reduced land requirements, and improved system reliability. The increased energy production can be achieved even under partially shaded conditions, making bifacial systems ideal for applications where shading is a concern. Additionally, bifacial systems can be designed to operate with a range of solar irradiance levels, making them suitable for a variety of locations and applications.
Challenges and Considerations
While bifacial systems offer several advantages, there are also some challenges and considerations to be aware of. One key consideration is the suitability of the location for bifacial systems, which typically require a high level of diffuse solar irradiance to achieve optimal performance. Additionally, bifacial systems may require more complex installation procedures and additional components, such as reflectors or trackers, to optimize energy production.
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