Trilig Energy

How Solar Panel Works

Solar panels harness the sun's energy and convert it into usable electricity that can be used for various purposes. On an average, every square metre of the Earth's surface receives 164 watts of solar energy over 24 hours. So the entire planet receives 84 Terrawatts of power, whereas our worldwide consumption is 12 Terrawatts of power. In other words the sunlight received by every square metre of the Earth's surface is enough to light up the whole planet with the Sun's energy.


Research suggests that if even 1% of Sahara desert was covered with solar panels, it would have produced solar energy enough to meet the requirement of the whole world.


Thus solar energy is a wonderful concept. Taking power from the sun and converting it into electricity to fulfill our energy needs is a terrific idea. This entire process is carried out by solar PV cells based on photovoltaic effect.

How solar photovoltaic (PV) cell work?

A solar cell generates electricity using photovoltaic effect, a phenomenon discovered in early 19th Century when it was observed that certain materials produced electrical charge when exposed to sunlight.


Each cell is made up of two semi-conducting layers combined together to create photovoltaic effect. When exposed to sunlight, the semi-conducting material absorbs photons which excite electrons causing some of them to resonate between the layers thus generating electric charge. This semi-conducting material is silicon.


Solar cells generate most of the electricity form direct sunlight; however they also generate electricity cloudy days.

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