The paper presents a recent failure that occurred during the construction phase of a utility‑scale photovoltaic power plant with a total capacity exceeding 20 MW. Modern single‑axis tracker structures and PV modules were damaged during a severe summer storm. The study includes an analysis of the construction work carried out on site, as well as an assessment of the available design documentation. To verify the correctness of the applied structural solutions, numerical models of the investigated system were developed. A frequency analysis and an assessment of possible torsional galloping occurrence were performed. Based on the conducted investigations, it was concluded that the failure resulted from a combination of factors, including incorrect assumptions regarding design loads, design and execution errors, and excessive simplifications adopted in the structural modelling process. Complex soil conditions at the construction site were also found to be a significant contributing factor. The conducted analysis indicated that the requirements of current standards were not satisfied with respect to both ultimate and serviceability limit states. Consequently, structural strengthening measures were proposed. Introduction of additional bracings, foundations and dampers enabled compliance with the current standards requirements.