Photovoltaic solar energy is an electrical energy produced from solar radiation through panels or photovoltaic solar power plants. It is said to be renewable because its source (the sun) is considered inexhaustible on the scale of human time.
The photovoltaic cell is the basic electronic component of the system. It uses the photoelectric effect to convert electromagnetic waves (radiation) emitted by the sun into electricity. Several cells connected together form a photovoltaic solar module and these modules grouped together form a solar installation. Electricity is either consumed or stored on site or transported by the electricity distribution and transmission network.
Photovoltaic energy is a global issue affirmed by Cop21; in November 2015, the International Alliance for Solar Energy (or ISA for "International Solar Alliance") was launched, a project aimed at coordinating the development policies of solar thermal and photovoltaic energy in terms of training, the development of common standards, sharing of experience and joint ventures for states rich in solar resources.

In 2016, worldwide solar photovoltaic power generation was 375 TWh, or 1.8% of total electricity production. It would take the equivalent of producing a 100,000 square kilometer photovoltaic area (the size of Iceland) to cover all of the world's electricity needs. The International Energy Agency predicts that the share of solar PV in global electricity production could reach 16% in 2050. There are several techniques of photovoltaic solar modules:
- Monocrystalline solar modules have the best performance per square meter and are mainly used when space is limited. The cost, which is higher than that of other installations of the same power, thwarts the development of this technique.
- The polycrystalline solar modules currently have the best quality / price ratio, which is why they are the most used. They have a good yield and a good life (over 35 years);
- The amorphous solar modules will certainly have a good future because they can be flexible and have a better production in low light. However, the amorphous silicon has a yield divided by two compared to that of the lens, so this solution requires a larger area for the same installed power. However, the price per square meter installed is lower than for solar panels composed of crystalline cells.

The installation of solar photovoltaic panels ensures you regular income for 20 years through the resale of electricity produced.
The panels capture the free energy of the sun that you can sell to the network. Photovoltaic panels are therefore a cost-effective, environmentally friendly and cost-effective solution.
To install photovoltaic solar panels, it is not mandatory to live in the South of Tunisia. The ideal is to have a sunny space. Photovoltaic is a possible solution everywhere in Tunisia. The installation of solar panels is a delicate operation: it is important to call on a qualified professional to install and connect to the network. Which Energy puts you in free contact with its partner installers to guarantee you a quality installation. CIGAP is here for you.