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Photovoltaic Module Reliability || Predicting PV Module Service Life
摘要： What the PV industry would like is one set of accelerated stress tests that when successfully passed would ensure that a particular module type could survive in the field for 25 years. Implicit in that statement is the assumption that the test sequence is reasonably short. Most people asking for such a test sequence are probably thinking in terms of a few months of testing with an answer that spans a reasonable range of years (something like 25–35 years). This is not likely to happen because not all modules are designed and made the same way, nor are they deployed in the same geographic locations, so they are likely to degrade or fail via different mechanisms at different rates. McMahon et al. [1] came to this same conclusion as early as 2000.
关键词： PV module,degradation,service life,failure modes,accelerated stress tests
更新于2025-09-19 17:13:59
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Photovoltaic Modules (Technology and Reliability) || 10. Accelerated aging tests
摘要： All environmental simulation tests which allow an accelerated analysis of material degradation processes through intensified environmental stress levels compared to real life can be summarized under the notion of accelerated aging tests. This type of test is especially useful for products with long service lifetimes, such as photovoltaic modules. As guarantees for PV modules cover up to 30 years of service life, accelerated aging tests are of high economic importance for PV modules manufacturers. As PV manufactures aim for utilizing materials which are both economically and technically suitable, accelerated aging tests on full PV modules as well as on separate materials and material combinations are necessary. It is in the interest of the customer as well the investor and the insurance that the product achieves the expected service life without major performance losses. The aim of accelerated aging tests is to achieve reliable results within a very short period of time and with minimum costs in order to keep pace with the rapid innovation cycles. In order to ensure the transferability of the testing result on real life performance, a specific adaptation of the test conditions to the specific materials and stress factors is indispensable. Otherwise, climatic conditions may be induced which either exceed or undermine those under standard operation, and this may subsequently lead to altered physical or chemical degradation processes. Thus, the processes which occur under standard operation should be accelerated but at the same time simulated as close to reality as possible.
关键词： photovoltaic modules,service life,environmental stress,material degradation,accelerated aging tests
更新于2025-09-16 10:30:52