Solar panel

A solar cell panel, solar electric panel, photo-voltaic (PV) module or solar panel is an assembly of photo-voltaic cells mounted in a framework for installation. Solar panels use sunlight as a source of energy to generate direct current electricity. A collection of PV modules is called a PV panel, and a system of PV panels is called an array. Arrays of a photovoltaic system supply solar electricity to electrical equipment.

From Wikipedia, 

Applications:

In the world of electronics solar energy is also used to give energy in case of an emergency to power banks or where portability is need it. Brands like NetCom lab have develop products base on solar energy because we have seen that in case of a emergency like in a hurricane or when ever it might be a problem with electricity  or  camping that also portability is need it when there is no and electrical outlet near here you can check some of these products that can be a solution when regular electricity is a problem:

Full product line up  of rechargeable fans, radio and surge protectors