Photovoltaic Solar Energy

Knowledge of photovoltaics:

 1. Composition and principle of the photovoltaics system, the photovoltaics system consists of three parts: Solar Cell Modules; Electrical and electronic equipment such as charge and discharge controllers, inverters, test instruments and computer monitoring and control, and batteries or other energy storage and auxiliary power generation equipment. The photovoltaics system has the following features:-No rotating parts, no noise;-No air pollution, no waste water;-No combustion process, no fuel;-simple maintenance, low maintenance costs; - Reliable operation and good stability;-long service life of solar cells as key components, crystal silicon solar cells can reach more than 25 years; it is easy to expand the scale of power generation on demand.

 2. Classification and introduction of photovoltaic system

Photovoltaic power generation is a direct conversion of solar energy into electrical energy using the photovoltaic effect of a semiconductor interface, the key element of which is the solar cell. A large area of solar cell module can be formed after the solar cell is packaged and protected in series, and then combined with power controller and other components to form a photovoltaic power generation device. The advantage of photovoltaic power generation is that it is less geographically limited because the sun shines all over the land; The photovoltaic system also has the advantages of safety, reliability, no noise, low pollution, no consumption of fuel and the installation of transmission lines can be on-site power generation and supply and construction of short period.

  Photovoltaic power generation is based on the photovoltaic effect principle, which uses solar cells to convert sunlight directly into electricity. Whether used independently or in parallel, the PV system is mainly composed of three parts: Solar Panel (module) , controller and inverter. They are mainly composed of electronic components and do not involve mechanical parts, photovoltaic power generation equipment is extremely refined, reliable and stable long life, easy to install and maintain. In theory, photovoltaic technology could be used in any situation where power is needed, from spacecraft to home power, from megawatt-scale power stations to toys to photovoltaic power, everywhere. The most basic components of photovoltaics are solar cells (wafers) , which consist of monocrystalline silicon, polycrystalline silicon, amorphous silicon, and thin film cells. At present, single crystal and polycrystalline batteries are the most used, amorphous batteries are used in some small systems and computer auxiliary power supply.