###### Abstract
The height of the ice cover was up to 8 cm [4]. The total damage was estimated at 25 million euros [5]. The Faculty of Electrical Engineering, Computer Science and Information Technology Osijek (FERIT), as a higher education institution in the field of power engineering, has been in Pozega for many years and is a place where research is conducted in the field of power engineering, as well as in the field of photovoltaics [6; 7]. Within the activities of the Laboratory of Renewable Energy Sources [8], the faculty has been engaged in the analysis of PV power plants, taking into account the various aspects of the impact of this disaster. One of the tasks set is also the objective of this work; to evaluate the applicability of infrared thermography in the possibility of using remaining visually undamaged modules in the revitalization of power plants, with the ultimate goal of stabilizing the power supply at micro-sites. The site chosen for presentation in this paper was the production company in Pozega. The European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) represents a significant knowledge base in the field of photovoltaics. One of the early contributions, which provides an overview of the topic of photovoltaic module degradation for different types of photovoltaic module failures [9], is the comprehensive knowledge of the analyzed topic. Standard IEC TS 62446-3: 2017, which refers to thermographic testing, provides comprehensive instructions for performing the test [10], but not the temperature values for classifying the anomaly class (CoA). According to the literature [11], the initial expected values of the temperature difference are in the range of 10 \({}^{\circ}\)C. The use of criteria commonly used in infrared thermography for an energy audit of electrical installations, as described in [12], is not suitable for PV analysis and the criteria must be determined for each specific application. The expected temperature range in which PV modules are tested is given by IEC 61215 [13], and the maximum temperature limit is given by IEC TS 63126 [14]. The expected range of operating temperatures in practice can be found in [15; 16; 17]. The influence of external parameters, such as solar irradiance, wind, and ambient temperature, on PV panels can be found in [18]. Perhaps, the most challenging aspect of thermographic testing is the selection of imaging parameters, which are described in [19; 20]. The Photovoltaic Power Systems Program of the International Energy Agency (IEA-PVPS) provides the most comprehensive analysis of the field of photovoltaics to date through its publications, and the guidelines from two reports have been used for the purposes of this study [15; 21]. Thorough research on the reliability of PV modules can be found in the National Renewable Energy Laboratory (NREL) reports [22; 23], especially on visualizations of possible damage to modules that have been in long-term operation. The contribution of the paper is manifested in defining the class of abnormalities for the analyzed modules, and determining that thermography is a complementary method to existing standard test methods. No matter how time consuming, it can lead to the observation of damage in the making or pre-existing damage that cannot be detected using fast conventional methods. The paper is divided into four sections. The first introductory section provides information about the event that led to the study, a review of the current literature, key findings of the paper, and the structure of the study. The second section, which describes the materials and methods, is divided into two subsections, the first of which contains the methodology, and the second subsection contains a description of the test site and an evaluation of the electrical performance of the PV modules.