Top 5 performance parameters of high-profile solar panels

1. Open circuit voltage Open circuit voltage UOC: that is, the output voltage of the solar cell when the solar cell is placed under the light source of 100mW/cm2 and the two ends are open. 2. Short-circuit current Short-circuit current ISC: is the current flowing through both ends of the solar cell when the solar cell is placed under the illumination of a standard light source and the output terminal is short-circuited. 3. High output power The working voltage and current of the solar cell change with the load resistance. The volt-ampere characteristic curve of the solar cell can be obtained by making a curve of the working voltage and current value corresponding to different resistance values. If the selected load resistance value can maximize the product of output voltage and current, the maximum output power can be obtained, which is represented by the symbol Pm. The working voltage and working current at this time are called the optimum working voltage and optimum working current, which are represented by symbols Um and Im respectively. 4. Fill factor Another important parameter of solar cells is the fill factor FF, which is the ratio of the maximum output power to the product of the open-circuit voltage and short-circuit current. FF is an important indicator to measure the output characteristics of solar cells. It represents the characteristics of the maximum power that the solar cells can output when the solar cells are under optimal load. The larger the value, the greater the output power of the solar cells. The value of FF is always less than l. In fact, due to the influence of series resistance and parallel resistance, the actual value of solar cell fill factor is lower than the ideal value given by the above formula. The series and parallel resistances have a great influence on the fill factor. The larger the series resistance, the more the short-circuit current drops, and the more the fill factor decreases; the smaller the parallel resistance, the greater the current in this part, the more the open-circuit voltage drops, and the more the fill factor also drops. . 5. Conversion efficiency The conversion efficiency of a solar cell refers to the maximum energy conversion efficiency when the optimal load resistance is connected to the external loop, which is equal to the ratio of the output power of the solar cell to the energy incident on the surface of the solar cell. The photoelectric conversion efficiency of a solar cell is an important parameter to measure the quality and technical level of the cell. It is related to the cell's structure, junction characteristics, material properties, operating temperature, radiation damage from radioactive particles, and environmental changes. Company: Shanghai CHZ Changhui Lighting Technology Co., Ltd. Website: www.chz-lighting.com