Transcription of Understanding Potential Induced Degradation
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Understanding Potential Induced Degradation
Understanding Potential Induced Degradation Introduction Potential Induced Degradation (PID) is an undesirable property of some solar CONTENTS. modules. The factors that enable PID (voltage, heat and humidity) exist on all Introduction photovoltaic (PV) systems, but the effect does not occur on all or even most Page 1. PV systems. According to Dr. Peter Hacke of the National Renewable Energy Causes of PID. Laboratory (NREL), All c-Si [crystalline silicon] modules have elements of Page 1. reversible and non-reversible [PID] mechanisms. The key is to understand the Environmental Factors extent to which modules experience these mechanisms. Page 2. PID was first recognized in the 1970's, and has been studied since. The System Factors rapid growth in PV plant deployments, combined with dramatic reduction Page 3. in module prices (and in some cases, module quality), has brought renewed Module Factors interest in the phenomenon. And because the issue is highly technical, Page 4.
2 The Causes of PID Potential Induced Degradation, as the designation implies, occurs when the module’s voltage potential and leakage current
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