PV panel :

               Photovoltaic Solar panels absorb sunlight as a source of energy to generate electricity. A PV junction box is attached to the back of the solar panel and it is its output interface.Externally, most of photovoltaic modules use MC4 connectors type to facilitate easy weatherproof connections to the rest of the system. Also, USB power interface can be used. 

Solar Panel maintanance :

               Solar panel maintenance is important because insufficient care for solar panels can reduce the amount of energy that these panels generate for your home. Since a solar panel system needs to absorb energy from the sun, the most vital component of solar panel care is to keep the panels clean.

              For a general cleaning, simply use a standard garden hose to wash the face of the panels during either the early morning or in the evening. Avoid spraying cold water onto hot panels or you could risk cracking them. There are also automated cleaners that work similar to sprinklers, such as the Heliotex system, which can be programmed to clean your panels as needed – a good choice if you are in an especially dusty area.