PID Effect

What is PID Effect?

Stands for Potential Induced Degradation. It is a form of performance reduction in photovoltaic cells resulting from high voltages in the PV system. A correspondingly high negative voltage may take place between the solar cells and aluminum frame grounded for safety reasons, in case the solar module has a negative potential to ground when operating. Electrons can get released from the materials the module is made from, follow the electric field and flow off through the grounded frame. As a result, the module’s charge increases. As a rule, this effect can be reversed or avoided if particular measures are taken.



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