Triple-junction solar cells, known for their high efficiency, face significant performance challenges in hot climates due to heat accumulation, which leads to thermal degradation and reduced energy output. In regions like Saudi Arabia, where solar irradiance is intense, effective thermal management is essential to ensure long-term performance and system reliability. Active cooling systems, including forced air and liquid-based cooling, play a crucial role in regulating cell temperatures by enhancing heat dissipation through convective mechanisms. These systems use external forces, such as fans or pumps, to increase the convective heat transfer coefficient, thereby improving heat removal efficiency. Water-based cooling is especially effective due to water’s high specific heat capacity, enabling it to absorb and transport large amounts of thermal energy. The application of the First Law of Thermodynamics highlights the importance of minimizing thermal energy losses to maximize electrical output. By maintaining PV modules at near-optimal temperatures, active cooling reduces efficiency losses caused by high operating temperatures. This approach aligns with Saudi Vision 2030, which emphasizes the expansion of renewable energy infrastructure and technological innovation. Implementing optimized cooling systems in solar installations not only supports national energy goals but also enhances sustainability, performance, and the economic viability of advanced photovoltaic technologies.