PID-resistant modules

PID-resistant modules use a cell and module design that makes them less susceptible to Potential Induced Degradation (PID), and such products are sold commercially. Choosing modules that have passed PID testing to IEC 62804-1 is a recommended preventive action, because tested modules are less prone to PID. Check that the bill of materials of the delivered modules matches the modules that were tested, since a material change can void the test result. PID susceptibility can be checked in a laboratory before modules are selected. As a corrective action, if PID is advanced but has not visibly damaged the modules, recovery can take months or even years, so replacing all modules with ones tested as PID-resistant is suggested. Choosing resistant modules can be combined with system-level measures such as grounding or offset strategies, a transformer-based inverter and cleaning off conductive soiling. The sources say tested modules are less prone to PID, not that they are immune to it, so keep monitoring for PID signs.

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• sentence 3: support check: partial - Passages say to verify that the BOM corresponds, but do not say a material change can void the test result.
• sentence 6: support check: partial - Grounding/offset strategies, PID-resistant modules, cleaning conductive soiling and a transformer inverter are each mentioned, but nothing explicitly says they can be combined.
• sentence 7: support check: partial - Passages say tested modules are 'less prone' to PID, but nothing recommends continued monitoring for PID signs after choosing tested modules, and 'not immune' is only implied. -->