- This is a completely renewable source of energy.
- It works via the photovoltaic effect which is exhibited by certain semi-conductor particles.
- Most solar cells are highly purified wafers of silicon with traces of other elements that allow it to function as semiconductors to produce electricity.
- A typical solar cell has a thickness ranging from less than a human hair to the thickness of a sheet of paper.
- A solar panel is just a panel upon which many solar cells are wired together to produce electricity from sunlight.
- When photons agitate the particles within semi-conductors these particles ionise.
- The resultant charged particles are conducted onto metal strips which are joined to each other across a component or other to generate a current.
- It releases a direct current which can be changed into AC using a power inverter.
- A rectifier can be used to convert AC current back into DC current.
Products which can use solar power:
- These include torches, digital watches and even satellites.
- Solar power is a renewable resource.
- Solar power is non-polluting.
- The energy and heat from the sun is free.
- Solar cells require very little maintenance because they have no moving parts:
- Unless said solar cell was mounted on a panel that rotates as the sun moves across the sky.
- Solar cells can last a lifetime.
- Solar cells are very expensive to make.
- Solar cells have a rather low efficiency.
- Solar cells cannot produce electricity when there is no sunlight.