The working environment temperature of solar cells can vary within a wide range. The short circuit current of a battery does not depend strongly on temperature. As the temperature increases, the short circuit current increases slightly, but the open circuit voltage and fill factor decrease. Therefore, the total impact of increasing temperature on the battery is to reduce efficiency and power output. The power output of monocrystalline silicon solar cells will decrease by 0.4% to 0.6% for each degree of temperature increase, but GaAs cells are only half as sensitive to temperature changes as cells made of monocrystalline silicon. silicon. Therefore, in order to achieve greater power output, solar cells are more suitable to operate at lower temperatures.
1. Light intensity: if you only consider light intensityuse and think that the temperature does not change much, the main impact is the current. Theoretically, it is believed that the stronger the light intensity, the greater it is. current!
2. Temperature: This factor is one of the killers of solar cells! Generally speaking, the higher the temperature, the current will increase (less), but the voltage will decrease (more), so the overall battery performance will decrease. The temperature coefficients of different types of batteries are generally: monocrystalline. The temperature coefficient of silicon cells is -0.45%/degree, that of HIT cells is -0.25 --- 0.33%/degree, and that of thin film cells can be even lower! Of course, temperature absorption has a close relationship with opening pressure (the higher the Voc, the lower the temperature coefficient!!)
3. In general: Since strong light will naturally cause an increaseion of temperature, performance It's great! Of course, this does not mean that the dimmer the light, the better, the current situation should also be taken into consideration! Generally, performance will definitely decrease when it exceeds 60 degrees!
4. As for the maximum temperature it can withstand, there is no limit. It stands to reason that it can work at any high temperature, but the performance is very poor! The higher the temperature, the lower the open circuit voltage (essentially a linear relationship!!). Of course, the test standard for measuring battery quality is 1000W/m2, spectrum: AM1.5 spectrum, temperature: 25℃, test method: IEC60904-1! !