In this study, the design of a photovoltaic solar power plant with an installed capacity of 1 MW was carried out in Konya, one of the leading provinces in Turkey in terms of solar energy potential. The performance of the plant was thoroughly evaluated through comprehensive simulation analyses. During the feasibility phase, two widely used simulation software programs in the solar energy sector, PVsyst and PVSOL, were employed. Using these tools, the plant's annual energy production capacity was calculated in detail based on long-term solar radiation data specific to the region. The simulation process focused not only on estimating energy production but also took into account several technical and environmental parameters, such as panel layout, inverter selection, cabling and conversion losses, geographical location, environmental effects, and meteorological conditions. By considering these factors, the plant was modeled in a way that closely reflects real operating conditions. To assess the accuracy of the simulation results, the data obtained were compared with actual production data from an existing solar power plant in the Konya region with similar technical characteristics for the years 2022 and 2023. The comparative analysis revealed that PVsyst showed a deviation of 5.43% in 2022 and 13.44% in 2023. In contrast, PVSOL demonstrated lower error margins, with deviations of 1.83% and 9.58% for the same years, respectively. Consequently, the use of PVSOL-based analyses in investment planning could offer more reliable projections for investors, contributing to increased system efficiency, more accurate calculation of return on investment, and overall cost optimization. The study aims to shed light on the key criteria for selecting software tools in solar energy investments, thereby contributing to the development of the sector.