New research: the PV module high temperature and humidity test speed increased 70 times
Japan's National Institute of Advanced Industrial Science and Technology (AIST) announced that it has developed a new test method that can accelerate the accelerated test of crystalline silicon solar panels (modules) over 70 times under high temperature and high humidity. This is the result of a module reliability research group that produces research and development photovoltaic power generation research center. It has been found that when the crystalline silicon solar cell module is exposed to high temperature and high humidity environment for a long time, the acetic acid produced by the hydrolysis of the encapsulating material corrodes the finger silver electrode printed on the solar cell (power generating element), resulting in the electrode- The resistance rises. Therefore, as an accelerated test method for confirming the reliability of a finger silver electrode, a battery cell has been made into a module and subjected to a high-temperature high-pressure test at a temperature of 85 ° C and a relative humidity of 85% for 3,000 to 5,000 hours. Comprehensive research said that the direct exposure of solar cells in acetic acid vapor, you can see a very short period of time and high temperature and pressure in the module observed under the same phenomenon. Deterioration occurs at about 70 times the original method of testing on the module. When this phenomenon is applied to an accelerated test, the reliability of the solar battery cell electrode can be easily confirmed at a speed 70 times or more.
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