Pid In Solar Panels

Potential induced degradation pid and light induced degradation lid.
Pid in solar panels. Pid refers to degradation induced by high voltages. On the other hand lid refers to degradation that occurs due to sunlight. Because of poor grounding high voltages and inadequate shielding between individual solar cells leakage occurs which dramatically reduces the electricity yield of solar panels. It causes a drop in output of a solar system that ranges anywhere between 5 to 30 or more.
The degradation could be high as 30 or even up to 70 in some cases. The degradation occurs in solar energy systems and can be reversible or irreversible. Pid is an undesirable effect on of some solar modules. In some solar power plant systems pid also known as surface polarization has been found to cause drops in output of up to 30 after only a few years of operation.
This effect may cause power loss of up to 30 percent. The factors that can cause pid include voltage heat and humidity and most solar modules are exposed to the combination of these factors during their working life. It is an important issue of performance degradation in crystalline silicon solar panels. Pid stands for potential induced degradation.
Module rated system voltage and polarities chamber air temperature 60 c 2 c. Solar panels pv modules may experience one or both of two forms of degradation. Potential induced degradation pid is well known and feared by solar panel manufacturers the world over. Solar panels are considered to be pid free when they pass the iec 62804 standard test.
This graphic below details the mechanism of pid within a solar module or solar panel. What is pid potential induced degradation. It is a process which occurs only a few years after installation. This test is performed under following basic conditions.
The factors that can cause pid include voltage heat and humidity and most solar modules are exposed to the combination of these factors during their working life. Potential induced degradation pid is a potential induced performance degradation in crystalline photovoltaic modules caused by so called stray currents. Pid potential induced degradation is a phenomenon that negatively affects the cells of pv modules. Pid is a phenomenon or situation that hampers solar panel performance.
Pid is an undesirable effect on of some solar modules. How does pid occur. Or what is the mechanism of pid.