Solar Power Systems and Equipment
The household solar power systems is generally composed of a photovoltaic array composed of solar cell components, a solar charge and discharge controller, a battery pack, an off-grid inverter, a DC load and an AC load. If the output power is AC 220V or 110V, an inverter is also required. The photovoltaic array converts solar energy into electrical energy under the condition of illumination, and supplies power to the load through the solar charge and discharge controller, and charges the battery pack at the same time; when there is no light, the battery pack supplies power to the DC load through the solar charge and discharge controller. At the same time, the battery also needs to directly supply power to the independent inverter, which is converted into alternating current through the independent inverter to supply power to the alternating current load.
Photovoltaic solar power systems are a technology that directly converts light energy into electrical energy by utilizing the photovoltaic effect of the semiconductor interface. The key element of this technology is the solar cell. After the solar cells are connected in series, they can be packaged and protected to form a large-area solar cell module, and then combined with power controllers and other components to form a photovoltaic solar power systems device. The advantage of photovoltaic solar power systems is that it is less restricted by geographical areas, because the sun shines on the earth; the photovoltaic system also has the advantages of safety and reliability, no noise, low pollution, no need to consume fuel and erect transmission lines, and can generate electricity and power locally, and the construction period is short.
Photovoltaic solar power systems is based on the principle of photovoltaic effect, using solar cells to directly convert sunlight energy into electrical energy. Whether it is used independently or connected to the grid for solar power systems.
The photovoltaic solar power systems is mainly composed of solar panels (components), controllers and inverters. They are mainly composed of electronic components and do not involve mechanical parts. Therefore, photovoltaic solar power systems equipment is extremely refined, reliable and stable, long life, installation Easy maintenance. In theory, photovoltaic solar power systems technology can be used in any occasion that requires power, ranging from spacecraft, down to household power, large to megawatt power stations, small to toys, photovoltaic power is everywhere. The most basic components of solar photovoltaic solar power systems are solar cells (sheets), including monocrystalline silicon, polycrystalline silicon, amorphous silicon and thin film cells. Monocrystalline and polycrystalline batteries are used the most, and amorphous batteries are used for some small systems and auxiliary power supplies for calculators.
The efficiency of domestic crystalline silicon cells is about 10 to 13%, and the efficiency of similar foreign products is about 18 to 23%. A solar panel consisting of one or more solar cells is called a photovoltaic module. Photovoltaic solar power systems products are mainly used in three aspects: first, to provide power for powerless occasions, mainly to provide power for the living and production of residents in the vast powerless areas, as well as microwave relay power supply, communication power supply, etc. In addition, it also includes some mobile power supplies and Backup power supply; second, solar daily electronic products, such as various solar chargers, solar street lights and solar lawn lights; third, grid-connected solar power systems, which has been widely implemented in developed countries. China's grid-connected solar power systems has not yet started, however, part of the electricity used for the 2008 Beijing Olympics was provided by solar power and wind power.
