This study presents a technical and economic analysis of an off-grid microgrid system based on photovoltaic energy and battery storage, designed to meet the energy needs of the rural community of Ejido Delicias in Baja California, Mexico. The analysis focuses on the impact of varying photovoltaic capacity and storage on key performance indicators, including solar contribution, auxiliary energy use, energy losses, and the Levelized Cost of Energy (LCOE). The results indicate that while increasing photovoltaic capacity reduces auxiliary energy consumption, it requires a significant initial investment. The optimal configuration identified in this study consists of a 200 kW photovoltaic system and 450 kWh of battery storage, achieving an LCOE of 230 USD/MWh and covering 97.4% of the community’s annual energy demand. In comparison, extending the electrical grid would result in an LCOE of 244.43 USD/MWh over a 25-year analysis period, but it would limit the community’s energy independence. The findings suggest that a photovoltaic microgrid with battery storage is a viable and competitive solution for electrifying remote communities, offering both energy security and economic efficiency. The study highlights the importance of optimizing photovoltaic generation and storage to maximize solar energy utilization while minimizing auxiliary energy consumption and operational costs.