Estudo da injeção de energia no horário de ponta por sistema fotovoltaico com armazenamento para redução dos custos energéticos no IFMG Campus Sabará

Abstract

This work analyzes the technical and economic feasibility of implementing a photovoltaic system with battery storage at the IFMG-Sabará campus, with a specific focus on energy injection during peak hours. The study adequately sizes the system to meet the energy needs of the campus and evaluates the return on investment time (payback), considering the implementation costs and the savings generated by reducing grid energy consumption during higher tariff hours. The analysis of the campus energy bills reveals that, despite representing only 16% of total consumption, consumption during peak hours corresponds to 35.3% of the total bill value. The proposed system, composed of 19 Trina Solar 405 Wp photovoltaic modules, 9 Unicoba LiFePO4 12 kWh batteries, and suitable inverters, was designed to meet the campus energy demand during peak hours. The economic analysis demonstrates that, despite the initial investment of R$ 372,020.00, the project presents attractive economic indicators, with a discounted payback of 7.3 years and an Internal Rate of Return of 11.4%. In addition to the economic benefits, the system will contribute to reducing greenhouse gas emissions and will offer significant potential for academic use.