Photovoltaic Power Generation

Photovoltaic (PV) power generation is the conversion of sunlight into electrical energy through the photovoltaic effect, whereby photons from the Sun create charge carriers in a semiconductor and generate usable current and voltage. The power a module can deliver is defined by its I–V characteristics, but its actual output depends on several external factors. For example, irradiance determines the number of incident photons, temperature influences the semiconductor’s operating efficiency, and the spectral composition of visible sunlight affects the absorption capacity of different wavelengths.

Photovoltaic output is therefore the result of the interaction between the photovoltaic effect and the surrounding environment. Understanding these factors forms the basis for estimating the performance of a photovoltaic system under real operating conditions.