photovoltaic (PV or photovoltaic), is the abbreviation of solar photovoltaic power generation system (photovoltaic power system), is a new type of power generation system that uses the photovoltaic effect of solar cell semiconductor materials to directly convert sunlight radiation into electrical energy. There are two modes of independent operation and grid-connected operation.

At the same time, solar photovoltaic power generation system classification, one is centralized, such as large northwest ground photovoltaic power generation system; One is distributed (with >6MW as the boundary), such as the rooftop photovoltaic power generation system of industrial and commercial enterprises and the rooftop photovoltaic power generation system of residential buildings.

A photovoltaic panel module is a power generation device that generates direct current when exposed to sunlight and consists of thin solid photovoltaic cells made almost entirely of semiconductor materials, such as silicon. Since there is no active part, it can be operated for a long time without causing any loss. Simple photovoltaic cells can provide energy for watches and calculators, and more complex photovoltaic systems can provide light for houses and power the grid. Photovoltaic panel components can be made into different shapes, and the components can be connected to generate more electricity. In recent years, PV panel components have been used on rooftops and building surfaces, and even as part of Windows, skylights or shelter installations, which are often referred to as build-mounted PV systems.