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What are the factors that affect the output characteristics of photovoltaic cells

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Time of issue:2022-09-07 15:06
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(Summary description)We all know that when the temperature of photovoltaic cells and components is high, the working efficiency will decrease. As the temperature of the photovoltaic cell increases, the open circuit voltage decreases.

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What are the factors that affect the output characteristics of photovoltaic cells

Categories:storage battery News
Author:
Origin:
Time of issue:2022-09-07 15:06
Views:

Information

1. The effect of temperature on the output characteristics of photovoltaic cells and modules
We all know that when the temperature of photovoltaic cells and components is high, the working efficiency will decrease. 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; while the photocurrent increases slightly with the increase of temperature, about every The photocurrent of the cell increases by one thousandth when the temperature is raised by 1 degree Celsius. In general, for every 1 degree Celsius increase in temperature, the power decreases 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 evaluating the performance of photovoltaic cells.

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2. The influence of light intensity on the output characteristics of photovoltaic cell modules
The light intensity is proportional to the photocurrent of photovoltaic cells and components. In the range of light intensity from 100-1000 watts per square meter, the photocurrent always increases linearly with the increase of light intensity; while the light intensity has little effect on voltage, and the temperature Under fixed conditions, when the light intensity varies within the range of 400-1000 wah per square meter, the open circuit voltage of photovoltaic cells and modules remains basically unchanged. Therefore, the power of the photovoltaic cell is basically proportional to the light intensity.

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