Ever wondered how sunlight becomes electricity?
Here’s a simplified look at how solar panels are created — from raw material to the finished product that powers your home.
1. Purifying Silicon
- Solar cells start with silicon, the second most abundant element on Earth.
- Raw quartz sand is refined and melted at extremely high temperatures to produce pure silicon ingots.
- These ingots form the base material for most solar cells.
2. Cutting Silicon Wafers
- The silicon ingot is sliced into ultra-thin wafers, about the thickness of a sheet of paper.
- Each wafer serves as the foundation for a single solar cell.
- The surface is then textured to capture more sunlight and reduce reflection.
3. Doping & Electrical Treatment
- The wafers undergo a process called doping, where other elements like phosphorus and boron are added.
- This creates positive (p-type) and negative (n-type) layers — allowing the flow of electricity when light hits the cell.
4. Adding Electrical Contacts
- Thin metallic lines (usually silver) are printed on the wafer’s surface to collect and transport electric current.
- A metal backing is also added to complete the electrical circuit.
5. Anti-Reflective Coating
- A special anti-reflective layer is applied to each cell to improve sunlight absorption and reduce glare.
- This gives solar cells their recognisable blue or black tint.
6. Assembling Solar Cells into a Panel
- Dozens of individual cells are connected in series and parallel, forming a solar module.
- The connected cells are then encapsulated between protective layers of EVA (ethylene-vinyl acetate).
7. Lamination & Framing
- The encapsulated cells are laminated under heat and pressure to seal and protect them from moisture.
- A tempered glass sheet is added on the front, and a durable backsheet at the rear.
- Finally, an aluminium frame is fitted for strength and easy mounting.
8. Junction Box & Testing
- A junction box is attached at the back to connect the panel’s electrical output.
- Each panel undergoes strict quality, performance, and safety testing to ensure it meets global standards.
9. Ready for Installation
- The finished solar panels are packed, shipped, and ready to be installed on rooftops — converting sunlight into clean, renewable energy for years to come.