Polycrystalline Cells: Poly solar panels are made from polycrystalline silicon, which is derived from multiple silicon fragments melted together. This results in a lower manufacturing cost compared to monocrystalline cells, which consist of a single crystal structure.

Cost-Effective : Poly solar panels are known for their cost-effectiveness. They are typically less expensive to produce than monocrystalline panels, making them a popular choice for budget-conscious solar installations.

Blue Appearance : Poly solar panels often have a bluish tint, which is a result of the manufacturing process and the multiple crystal structures within the cells.

Moderate Efficiency : While poly solar panels are less efficient than monocrystalline panels, they can still provide a reliable source of electricity. The efficiency of poly panels may vary depending on the manufacturer but typically falls in the range of 14% to 16%.

Versatility : Poly solar panels are used in a wide range of solar installations, including residential, commercial, and industrial applications. They can be mounted on rooftops, integrated into solar farms, or used for various off-grid and on-grid projects.

Durability and Longevity : Poly solar panels are designed to be durable and have a long operational life. They are built to withstand environmental factors like rain, snow, wind, and hail.

Suitable for Sunny Climates : Poly solar panels work well in areas with abundant sunlight and are a practical choice for many regions around the world.

The choice between poly solar panels and other types of solar panels, such as monocrystalline or thin-film, depends on factors like budget, available space, and specific project requirements. Poly solar panels are an excellent option for those seeking a balance between cost and performance in their solar energy system.

Polycrystalline solar panels, also known as multi-crystalline solar panels, are made using a specific manufacturing process. Here are the key steps and details involved in making polycrystalline panels

Silicon Ingot Production : The process begins with the production of silicon ingots. High-purity silicon is melted in a crucible and then slowly cooled to form a solid ingot. This ingot will serve as the source material for the solar cells.

Ingot Cutting : The silicon ingot is cut into smaller wafers using a wire saw. These wafers are typically square or rectangular in shape and are quite thin, usually around 180 to 240 micrometers in thickness.

Surface Texturing : To improve light absorption, the wafers’ surfaces are textured. This texturing involves etching the surface to create a textured, light-trapping structure that reduces reflection and enhances light capture.

Phosphorus Diffusion : The textured wafers are then treated with phosphorus to create a phosphorus-doped layer on the front side of the cells. This layer helps in enhancing the electrical properties of the solar cell.

Screen Printing : A conductive grid is screen-printed on the front surface of the wafers. This grid collects electrons generated by the absorption of sunlight.

Silver Paste : A layer of silver paste is applied over the screen-printed grid. Silver paste acts as a conductor and helps in collecting electrical current generated by the solar cell.

Firing : The wafers are then fired in a furnace, which fuses the screen-printed grid and the silver paste to the surface of the wafer.

Antireflection Coating : An antireflection coating is applied to the front surface of the solar cell to reduce reflection and enhance light absorption.

Electrical Contact : Metal contacts are applied to the rear surface of the cell to collect the electrons generated by the absorption of sunlight.

Sorting and Testing : The solar cells are sorted based on their electrical characteristics, and they undergo various testing procedures to ensure they meet quality and efficiency standards.

Tabbing and Stringing : Solar cells are tabbed and strung together in a specific configuration to create a solar module. This involves connecting the metal contacts on the rear of one cell to the front contacts of another cell using soldered metal ribbons.

Encapsulation : The solar cells are encapsulated between layers of glass or another transparent material to protect them from environmental factors and moisture. This encapsulation is typically done using a combination of ethylene-vinyl acetate (EVA) and a backsheet.

Frame and Junction Box : A frame is added to provide structural support to the panel. A junction box is also attached to the back of the panel to house the electrical connections.

Quality Control : The finished polycrystalline solar panel undergoes quality control and testing to ensure it meets efficiency and safety standards.

Once manufactured, these panels can be installed on rooftops, mounted on the ground, or integrated into various solar power systems to generate electricity from sunlight. The efficiency of the panel and its longevity will depend on the quality of materials and manufacturing processes used.