A solar panel is a collection of solar cells. The solar panel converts the solar energy into electrical energy. The solar panel uses Ohmic material for interconnections as well as the external terminals. So the electrons created in the n-type material passes through the electrode to the wire connected to the battery. Through the battery, the electrons reach the p-type material. Here the electrons combine with the holes. So when the solar panel is connected to the battery, it behaves like another battery, and both the systems are in series just like two batteries connected serially.
The major components of a battery solar power system are...