Potential-induced degradation (PID)

Illustrated explanation

Water exposure and module electrical stress are different issues

2Potential-induced degradation (PID)
Water exposure and module electrical stress are different issuesCallout 1: Floating PV environment. Callout 2: Potential-induced degradation. Floating PV places the array and its connections in a water-adjacent environment. Potential-induced degradation concerns electrical potential, materials and module conditions, not simply the entry seal. Current term: Potential-induced degradation (PID), callout 2. 1Array + support + cable routesFloating PV environment 2Cell-to-structure potentialPotential-induced degradation
  1. Floating photovoltaics (FPV)

    Floating arrays need the stated mechanical and environmental design. Review wet exposure, cable movement, supports and complete connector assemblies.

  2. Potential-induced degradation (PID)This term

    Potential differences and material or environmental conditions can contribute to module degradation. A change of gland alone does not establish PID resistance.

Floating PV places the array and its connections in a water-adjacent environment. Potential-induced degradation concerns electrical potential, materials and module conditions, not simply the entry seal.

Conceptual array and module sections. No floating-system capability, PID resistance or product qualification is represented.

ReferencesIEC 62548-1 — Photovoltaic array design requirementsIEC 61215-2:2021 — Photovoltaic module qualification — Test proceduresIEC TS 62804-1:2025 — PV module potential-induced degradation tests