Half-cell (H-C) module technology is a relatively new development to the photovoltaic (PV) industry which have been reportedly to offer reduced hot-spotting impacts and improved performance under shading conditions compared to conventional full-cell (F-C) modules due to the parallel or “butterfly” configuration of the substrings. PV modules deployed in the field experience changes in load conditions, soiling and shading levels which can influence the level of mismatch of electrical and thermal characteristics. These dynamic operating conditions affect the interpretation of thermal imaging and electrical characterisation measurements. This paper analyses the dynamics of electrical characteristics and abnormal thermal signatures observed on a mono-facial H-C crystalline PV module and individual cells that were captured at maximum operational voltage of the module under different cell shading levels. Partial shading on a cell reduces the operational voltages of the shaded cell and the substring containing the shaded cell and affects the operational current of the substring paralleled to it. When the operational voltage of the substrings is reduced, the substring paralleled to the shaded substring generates higher current to match the currents generated by other substrings and maintain the module’s current. The change in the operational voltage of the substrings and individual cells in these paralleled substrings will influence the dynamics of the abnormal thermal signatures resulting in poor quality cells showing or not showing their abnormal thermal signatures on thermal images. Poor quality cells will show their abnormal thermal signatures when the operational voltage is less than maximum power voltage (delivering more current) than when its operational voltage is higher than the maximum power voltage (delivering less current). This work gives valuable information which can advance the interpretation of thermal images of half-cut crystalline PV modules and improve maintenance of PV plants.