After the energy crisis of 2022, the word "photovoltaic" is being mentioned more and more. The installation of photovoltaic systems has become the consensus of people towards green and sustainable development. But what exactly is photovoltaic and why can photovoltaic panels generate electricity? Can it really bring me benefits? How much does it cost to invest in PV, and is it worth it? Do I want to buy solar panels like others? I believe that you will make your own choice after reading this PV module purchasing know how manual!
This manual is divided into two parts, this is the second part.
Photovoltaic panels: What is it and how does it work?
To invest in a photovoltaic system or renewable energy, first we should understand what it is and how it works.
The job of a photovoltaic panel is to collect the energy from the sun and generate electricity. Mainstream photovoltaic panels are made from silicon-based semiconductor materials, and by preparing PN junctions, these materials undergo a "photovoltaic effect" when exposed to sunlight, which generates direct current. That direct current is then converted by a device called an inverter into the kind of alternating current that flows in an electrical outlet. Some of it is used immediately, while the rest is fed back into the grid or stored in a battery, from where the current can be used again at a later time.
There are many manufacturers on the market, who offer different photo