Parasitic

Parasitic capacitance of photovoltaic panels to ground

Leakage current, also referred to as matrix residual current, arises from parasitic capacitance between the photovoltaic (PV) system and the ground. This phenomenon occurs when the PV system lacks a transformer, forming a low-impedance loop with the power grid. . This capacitance is not required for the function of the PV array, but comes about essentially from the mechanical structure of the modules and their installation, and is therefore also known as "parasitic" capacitance. PV capacitance can be theoretically estimated using p-n junction parameters such as doping [4 ]. The result is a common-mode voltage. . The way PV modules are designed means that they always exhibit capacitance towards their environment.