Solar modules work based on Photoelectric effect and in the simplest words, light energy conversion to electricity is photoelectric effect. There are different applications for photoelectric effect, but all are same basis. Here, we want to back to school and discuss about Photoelectric effect but in practical way without rocket science. Basically, we will find atomic model of matter and we will see there are some tiny particles that their actions and reactions provide energy.
A solar system, like an automobile, is made of different parts, and each component should do its task properly. Getting the most energy from a PV array depends not only on module quality, but also on proper installation. To achieve the highest achievable solar energy, it is usually necessary to capture as much solar energy as possible and then minimize the waste of solar energy. This leads to a more efficient system and is possible if it is installed correctly.
Photovoltaic Cell is the heart of a module what produce Electricity by Solar Energy conversion. All we are utilizing today as Photovoltaic systems are indebted to Albert Einstein paper in 1905 that based upon Max Planck Theory of Black Body radiation.