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release time:2024-05-08 Hits: Popular:AG11 battery
What factors affect the output of photovoltaic cells and what are their advantages?
The factors that affect the output characteristics of photovoltaic cells include the effect of temperature on the output characteristics of photovoltaic cells and modules and the effect of light intensity on the output characteristics of photovoltaic cells and modules. In addition, the advantage is that there is no risk of depletion; it is not restricted by the geographical distribution of resources, and users can emotionally Easy to accept; let me introduce the detailed content to you next.
1. Factors affecting the output characteristics of photovoltaic cells
1. Effect of temperature on the output characteristics of photovoltaic cells and components
As we all know, when the temperature of photovoltaic cells and components is high, the working efficiency decreases. As the temperature of the photovoltaic cell increases, the open circuit voltage decreases. In the range of 20-100 degrees Celsius, the voltage of the photovoltaic cell decreases by about 2mV for every 1 degree Celsius increase. The photocurrent increases slightly with the increase of temperature, about every 1 degree Celsius. The photocurrent of the battery increases by one thousandth when the temperature rises by 1 degree Celsius. In general, for every 1 degree Celsius increase in temperature, power is reduced by 0.35%. This is the basic concept of temperature coefficient. Different photovoltaic cells have different temperature coefficients, so the temperature coefficient is one of the criteria for judging the performance of photovoltaic cells.
2. Effect of light intensity on the output characteristics of photovoltaic cell modules
Light intensity is proportional to the photocurrent of photovoltaic cells and components. Within the range of light intensity from 100 to 1000 watts per square meter, the photocurrent always increases linearly with the increase of light intensity; while light intensity has little effect on voltage, and changes in temperature Under fixed conditions, when the light intensity changes within the range of 400-1000 watts per square meter, the open circuit voltage of photovoltaic cells and modules remains basically unchanged. Therefore, the power of photovoltaic cells is basically proportional to the light intensity.
2. Various advantages of photovoltaic cells
1. No risk of depletion;
2. Absolutely clean (no pollution, except for batteries);
3. Not restricted by the geographical distribution of resources;
4. It can generate electricity close to where it is used, and the energy quality is high;
5. It is easy for users to accept it emotionally;
6. It takes a short time to obtain energy;
7. The power supply system works reliably.
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