Solar home power generation system
A solar power generation system is a power generation system that directly converts solar energy into electrical energy using solar cells. Its main components are solar cells, batteries, controllers andInverter. It is characterized by high reliability, long service life, no pollution to the environment, independent power generation and grid-connected operation. It is favored by enterprises in various countries and has broad development prospects.
Home solar power systems are made up of solar cells,Solar Controller, battery (group) composition. If the output power is AC 220V or 110V, you need to configure the inverter.
Principle of power generation
The working principle of crystalline silicon n/p type solar cells: When a p-type semiconductor and an n-type semiconductor are closely combined into one piece, a p-n junction is formed at the interface between the two. When the photocell is illuminated by sunlight, a positive and negative charge accumulates on both sides of the p-n junction, generating a photo-generated voltage, forming a built-in electric field, which is the "photovoltaic effect." The photovoltaic array converts solar energy into electrical energy in the presence of light.Solar charge and discharge controllerThe power is supplied to the load, and the battery pack is charged at the same time; when there is no light, the DC load is supplied by the battery pack through the solar charge and discharge controller, and the battery is directly supplied with power to the independent inverter, and is converted into an alternating current by the independent inverter. , power the AC load.
Domestic solar power generation systems are divided into off-grid power generation systems and grid-connected power generation systems:
1. Off-grid power generation system. It is mainly composed of a solar cell module, a controller, and a battery. To supply power to an AC load, an AC inverter needs to be configured.
2. The grid-connected power generation system is that the direct current generated by the solar modules is converted into the alternating current that meets the requirements of the mains grid after being connected to the grid by the grid-connected inverter. The grid-connected power generation system has centralized large-scale grid-connected power stations, which are generally state-level power stations. The main feature is that the power generation can be directly delivered to the power grid, and the power grid can be uniformly deployed to supply power to users. However, such a power station has a large investment, a long construction period, and a large area, making it difficult to develop and promote. The decentralized small-scale grid-connected power generation system, especially the photovoltaic building integrated power generation system, is the mainstream of grid-connected power generation due to its advantages of small investment, fast construction, small floor space, and strong policy support.
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