Questionnaire on causes of photovoltaic panel damage

Do we need to review PV failures and degradation?

The need to review PV failures and degradation has encouraged researchers to engage in comprehensive research investigating and analysing experiments and real-world industry studies available in the literature. Köntges et al. reviewed PV failures based on their emergence in the operational life cycle.

Why do PV modules have abnormal degradation rates?

For instance, the National Renewable Energy Laboratory (NREL) developed accelerated stress tests to examine degradation rates, validating the superior quality and long-term reliability of PV modules . However, despite these measures, there are still reports of abnormal degradation rates in PV modules due to a variety of failures.

How to reduce the degradation of photovoltaic systems?

The degradation of photovoltaic (PV) systems is one of the key factors to address in order to reduce the cost of the electricity produced by increasing the operational lifetime of PV systems. To reduce the degradation, it is imperative to know the degradation and failure phenomena.

What is considered a photovoltaic failure?

Photovoltaic failure is not defined uniformly in the literature. Some definitions indicate that a drop of 80% in maximum output power is considered a PV failure . Others claim a 20% drop in maximal power is a PV failure . Durand and Bowling defined failure as a drop of more than 50% in maximum power output.

What causes PV failures and degradation?

It is worth noting that most of the studies included in this review primarily focus on detailing failures and degradation observed in PV operations, which can be attributed to various factors, including the manufacturing process and other external influences.

What are the most common PV modules failures?

The most common PV modules are made of wafer-based silicon solar cells. Therefore a large knowledge base has been accumulated for the most PV module failures of this type. However even for this type of PV modules some effects like potential induced degradation and snail tracks have been studied in detail in the last 3 years for the first time.