1. Photons Strike the Panel:
- Sunlight is composed of tiny packets of energy called photons.
- These photons strike the solar panel's surface, specifically the photovoltaic (PV) cells.
2. Electrons Get Excited:
- Each PV cell is made of silicon, a semiconductor material.
- Photons have enough energy to knock electrons loose from their atoms within the silicon. These electrons become "excited" and gain energy.
3. Electron Flow:
- The PV cell is designed with a positive and a negative layer, creating an electric field.
- The excited electrons, now carrying energy, are drawn toward the positive layer, while holes (empty spaces where electrons were) are attracted to the negative layer.
- This movement of electrons constitutes an electric current.
4. Direct Current (DC) Production:
- The flow of electrons within the PV cell creates a direct current (DC).
- This DC electricity is the raw output of the solar panel.
5. Conversion to Alternating Current (AC):
- To power homes and appliances, DC electricity needs to be converted to alternating current (AC).
- This conversion is done by an inverter, a device connected to the solar panel system.
6. Power Transmission:
- The AC electricity produced by the inverter is then sent to the electrical grid or directly to your home, depending on your solar panel system's setup.
In short:
Sunlight triggers a cascade of events within a solar panel, ultimately transforming light energy into electricity. It's a remarkable process that harnesses the power of the sun to generate clean and renewable energy.
