Solar cells have the working principle as a diode when no light. The composition of solar cells as well as diodes, which is composed of two layers called the PN junction.
When light comes and strikes the surface of the N-Si with a thickness of 0.5 μm, the light energy is absorbed by h.v, or so-called photons. Large photon energy, can release electrons to the depletion layer region, this causes the occurrence of free electrons and holes (positive charge carriers). Therefore there is a fairly large

To build a solar power system, installation of electrical components must be calculated eg current, voltage, power, and load requirements. Below is an example of the power consumption from solar power.

Solar modules have symbols such as solar cells. The voltage generated by the solar cell is 0.4 volt (size 10 x 10 cm). To get the required voltage and power, we need a lot of interconnected solar cells, called solar modules.

In some solar radiation, there are several types of light waves of different length. Some light can be seen by human eyes (known as visible light). and some other unvisible. Constant solar radiation above the atmosphere that magnitude occurred in 1367 W/m2 (Watts per square meter). After reaching the strong atmosper, the amount of radiation reduced as much light is lost due to absorption, reflection and so on.