What Is Solar Photovoltaics and How Does It Work?

Solar photovoltaics (PV) is a technology that converts sunlight directly into electricity using solar cells. These solar cells are made from semiconductor materials, most commonly silicon. When sunlight falls on the solar cells, they generate direct current (DC) electricity through the photovoltaic effect.

The electricity produced by solar panels is clean, renewable, and does not create air pollution during operation.

How Does Solar Photovoltaics Work?

The working process of a solar photovoltaic system is simple:

Sunlight Hits the Solar Panels

Solar panels absorb sunlight through photovoltaic (PV) cells.

Solar Cells Generate DC Electricity

The absorbed sunlight excites electrons inside the solar cells, producing direct current (DC) electricity.

The Inverter Converts DC to AC

Since most homes, businesses, and electrical appliances use alternating current (AC), an inverter converts the DC electricity into AC electricity.

Electricity Powers Electrical Devices

The AC electricity is used to operate lights, fans, air conditioners, machines, and other electrical equipment.

Extra Electricity Is Managed

If the system generates more electricity than needed, the extra power can either:

• Be sent to the electricity grid (in grid-connected systems), or
• Be stored in batteries (in off-grid or hybrid systems). 

Why Solar Photovoltaics Are Popular

• Produces electricity from renewable solar energy.
• Reduces dependence on conventional electricity sources.
• Requires low maintenance after installation.
• Has a long operating life, with most solar panels designed to last 25 years or more.
• Suitable for homes, commercial buildings, industries, and large solar power plants.