This degree work focuses on the design of a hybrid solar photovoltaic system for the Non-Interconnected Zone (NIZ) of Barrancominas, applying a PESTAR sustainability approach. The study identifies key challenges related to the lack of electrical infrastructure and geographic isolation, which negatively impact the region’s economic development. The current electrical supply, based on a diesel generator providing energy for an average of 16 hours daily, was analyzed, including the community’s energy demand and fuel consumption. A hybrid solar photovoltaic system, combined with energy efficiency strategies, was proposed to reduce diesel fuel consumption by an average of 10% per month. A detailed analysis of solar and wind resources in the area was conducted to determine the best renewable energy mix that meets the diesel reduction target. Based on this, the optimal hybrid system alternative was selected and its design developed. The chosen alternative (SSFH-D) was designed considering technical and economic factors, as well as compliance with regulatory requirements. The design was validated using PVsyst solar simulation software, and an economic analysis was performed leveraging the incentives from the Financial Support Fund for Electrification of Rural Non-Interconnected Zones (FAER). The system's return on investment was simulated by calculating the energy savings and using local energy tariff rates applicable to NIZ. Finally, the design was evaluated from political, economic, social, technical, environmental, and regulatory perspectives. The sustainability and reliability of the hybrid system design for Barrancominas were confirmed, achieving an average monthly diesel fuel reduction of 10%.