This study presents a numerical investigation of a hybrid photovoltaic-thermal (PVT) system enhanced with Vshaped fins (VF-PVT) for improved thermal and electrical performance in arid climates. Simulations were conducted under representative North African summer conditions (peak solar irradiance similar to 995.6 W/m(2), ambient temperature up to 44.98 degrees C), using a 3D CFD model validated against independent experimental measurements obtained under similar environmental conditions. The experimental dataset included hourly PV surface temperatures and thermal efficiencies for a flat-plate PVT system. Validation showed strong agreement, with root mean square errors (RMSE) of 1.43 degrees C for PV temperature and 1.87 % for thermal efficiency, and correlation coefficients of R-2 = 0.988 and R-2 = 0.991, respectively. Two designs were compared: a conventional flat-plate PVT (R-PVT) and the proposed VF-PVT, both operating with a 0.0025 kg/s water flow rate. The VF-PVT reduced peak PV temperature by 4.64 K, achieved 15.8 % higher daily thermal power (168.04 W vs. 145.13 W), and improved thermal efficiency by 15.67 % (33.36 % vs. 28.84 %). Electrical output increased by 1.5 %, with a 1.2 % gain in efficiency due to better thermal regulation. While the V-fin geometry enhances heat transfer with minimal hydraulic penalty, dust and dirt accumulation between fins may influence long-term outdoor performance. This validated approach offers a scalable, high-performance cooling strategy for PVT systems in hot climates.