Evaluation of energy production through solar photovoltaic technology for self-consumption in the parish council of São Bartolomeu de Messines, Portugal - preliminary study

Abstract

Human survival depends on the continuous supply of energy the demand of which has been steadily increasing. Sharp rises in fuel prices have had major repercussions on the economies of the countries with the greatest energy dependence, and make it imperative to change the attitudes and practices in business and social circles. Today, the problem involves meeting energy needs without negatively affecting the environment, as well as ensuring the well-being of current and future generations (sustainable development). The promotion of alternative energy is one of the priorities of the energy and environmental policy of European Union, since it is a decisive factor in reducing greenhouse gases, thus enabling compliance with the Paris agreement. In this work, the contribution of the photovoltaic systems installed for self-consumption in the headquarters of the parish council of São Bartolomeu de Messines, Algarve, Portugal, was assessed. The results indicate that a system with an installed capacity of 6 kW, requiring an investment around 10 000 €, could achieve its economic pay-back in 6.7 years, contributing to a reduction of the annual electricity bill in the building by 60%.