If you are going to learn about Bypass Diodes, this article will help you understand it more.
Bypass Diodes are used in solar photovoltaic (PV) systems to protect partially shaded PV cells from totally operating cells fully sun within identical solar panels once used in high voltage series arrays.
The solar photovoltaic panel is a good way to create free electrical energy using the power of the sun. You simply place them wherever you wish and away you go either as part of an off-grid stand-alone system or as roof put in PV panels for a grid-connected system. The power varies of a star electrical phenomenon system is very wide, from some milliwatts to many megawatts due partially to the modularity of the solar panels.
Photovoltaic cells are a kind of semiconductor photodiode that directly converts the light hitting their surface into electrical power. Photovoltaic systems generate electricity by connecting solar PV panels in the type of an array and exposing them to the direct sunlight. We would assume then that during normal operation all the solar panels of a PV system would experience the same solar conditions as they all type part of the same solar array.
However, the electrical generating performance and reliability of a PV system can be impacted on external factors, like environment, temperature, humidity, positioning, and degree of solar radiation which might all result in power degradation.
Be that as it may, as well as these obvious environmental factors, one factor especially that will result in mismatches between solar cells or whole panels, and power degradation within a solar array is shading, that's the blocking of the sunlight onto the cell, or panel by leaves, trees, buildings or antennas. This can be either full or partial shading and relying on the degree of shading, it will result in a decrease in output power.