1、 Solar panel The solar power generation panel is composed of monocrystalline silicon electrons and polycrystalline silicon electrons. Of course, monocrystalline silicon is better than polycrystalline silicon, and the price is more expensive. See
figure ① Explanation of working principle and conversion efficiency of solar photovoltaic power generation panel Figure ① solar panel (large and small power) 2、 Spectral response of solar panels Figure ② Explanation of working
principle and conversion efficiency of solar photovoltaic power generation panel Fig. ② spectral response curve of silicon solar cell It can be seen from the curve above that the spectral response range of silicon solar energy is very wide,
from visible light to infrared light, especially in the near-infrared range. It collects and forms current to the external circuit to drive the electric appliance (load) under the sunlight. See figure ③ Explanation of working principle and conversion
efficiency of solar photovoltaic power generation panel Figure ③ working principle diagram of solar photovoltaic cell 3、 Conversion efficiency of solar photovoltaic cells 1. Solar cells can directly convert solar energy into electric energy.
There are many parameters that determine their performance. Several important parameters are open circuit voltage VOC, short circuit current 1sc, maximum output power point voltage (also known as working voltage) VMA x, and maximum output power point
current (also known as working current) M α x. Fill factor F.F. and conversion efficiency η， These parameters are obtained under standard test conditions. 2. The standard test condition for solar cells is AM1.5. The irradiation light intensity is
1000w/m2. At 25 ℃, that is, on the sea level, the power of 1m2 photovoltaic panels vertically irradiated by the sun at noon is 1kW. Figuratively speaking, if the solar photovoltaic cells are spread over an area of 1m2, when the conversion rate of the
solar photovoltaic cells is 15%, the output power will reach 150W. At present, the conversion efficiency of solar cells is generally about 17-18%. However, some countries have studied the conversion efficiency to 25-35%, which needs to be popularized.
Although the spectral irradiance of the ground is changing anytime and anywhere, it is still regular. 3. IEC has stipulated the standard solar spectral irradiance P1.5 under the condition of AM1.5. It includes not only the direct radiation under
AM1.5, but also the scattered radiation, which is the total radiation distribution of the solar spectrum under this condition. 4、 Service life of solar photovoltaic panels A solar photovoltaic panel is packaged in the order of low-iron tempered
glass or other transparent cover plate, plus glass fiber, and the back cover is made of TPT material. Most of the solar PV modules manufactured by the above process can work for more than 20 years in the wet and harsh outdoor environment and the sun exposure
environment.
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