Solar cells mainly include crystalline silicon cells and thin-film cells, and their respective characteristics determine their irreplaceable status in different applications.
This solar cell uses high-purity monocrystalline silicon rods as raw materials, with a purity requirement of 99.999%. In order to reduce production costs, solar-grade monocrystalline silicon rods are used for ground-based solar cells, and the material performance indicators have been relaxed. Some can also use the head and tail materials and waste monocrystalline silicon materials processed by semiconductor devices to be redrawn into monocrystalline silicon rods dedicated to solar cells. The single-crystal silicon rod is cut into slices, and the thickness of the slices is generally about 175 μm. The silicon wafer is formed, polished, cleaned and other processes to make the raw silicon wafer to be processed.
Power Calculation of Monocrystalline Silicon Solar Cells
The solar AC power generation system is composed of solar panels, charge controllers, inverters and batteries; the solar DC power generation system does not include the inverter. In order to enable the solar power generation system to provide sufficient power for the load, it is necessary to reasonably select each component according to the power of the electrical appliance. Take 100W output power and use it for 6 hours a day as an example to introduce the calculation method:
1. First, calculate the watt-hour consumption per day (including the loss of the inverter): if the conversion efficiency of the inverter is 90%, then when the output power is 100W, the actual output power should be 100W/90 %=111W; if it is used for 5 hours a day, the power consumption is 111W*5 hours=555Wh.
2. Calculate the solar panel: Calculated according to the daily effective sunshine time of 6 hours, and considering the charging efficiency and the loss during the charging process, the output power of the solar panel should be 555Wh/6h/70%=130W. 70% of which is the actual power used by the solar panel during the charging process.
Test conditions for monocrystalline silicon solar cells
1. Since the output power of solar modules depends on factors such as solar irradiance and solar cell temperature, the measurement of solar cell modules is carried out under standard conditions (STC), which are defined as: air quality AM1.5, light intensity 1000W /m2, temperature 25℃.
2. Under this condition, the maximum power output by the solar cell module is called peak power. In many cases, the peak power of the module is usually measured by a solar simulator. The main factors that affect the output performance of solar cell modules are load impedance, sunlight intensity, temperature, shadow and so on.
Monocrystalline silicon solar cells are solar cells that use high-purity monocrystalline silicon rods as raw materials and are currently the fastest-developed solar cells. Its structure and production process have been finalized, and the products have been widely used in space and ground.