Photovoltaic (PV) modules are the core of every PV system, representing the power generation and their operation will affect the overall plant performance. It is one of the elements within a PV site with the higher f. ••Photovoltaic defects characterization and quality assessment.••Manufacturing, s. The recent growth in renewable power capacity has been led by solar photovoltaics (PV),. 2.1. Tested moduleFor the research development, a singular polycrystalline module composed of different defective and non-defective cells has been ad hoc. 3.1. Manufacturing defectsThree different kinds of manufacturing defects have been studied, as detailed in Table 1: low efficiency (E-L), medium efficiency (E-M) a. Quantitative analysis and characterization of manufacturing, soldering and breaking PV defects is performed by a combination of EL, IRT, I–V curves and visual tests. Equivalent-circui.