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A utilizacao de energias renovaveis e uma tendencia mundial que visa amenizar os impactos ambientais oriundos da atividade humana. A energia solar e considerada uma fonte energetica limpa e renovavel, fundamental para o futuro. O Sertao do Nordeste brasileiro apresenta caracteristicas geograficas e climaticas que favorecem a geracao de energia solar fotovoltaica. Assim, objetivou-se comparar a viabilidade economica entre unidades coletoras de energia solar nas residencias do sertao Paraibano e a fornecida pela concessionaria local em grid. Avaliou-se o custo medio pago pelas residencias daquela localidade que utilizam a energia da concessionaria em comparacao ao uso da energia solar fotovoltaica incluindo valores para instalacao e manutencao dos equipamentos de geracao de energia solar. Concluiu-se pela viabilidade do uso da energia solar, visto que o custo final e menor que o da energia eletrica fornecida pela concessionaria, alem do possivel aumento da micro geracao, acarretando aumentado do potencial energetico regional. PALAVRAS-CHAVE: Energia solar, Sertao paraibano, Viabilidade economica, Sustentabilidade. ECONOMIC FEASIBILITY COMPARATION BETWEEN GRID AND SOLAR ENERGY USE IN SERTAO PARAIBANO. ABSTRACT: The use of renewable energy is a global trend that aims to mitigate environmental impacts from human activity. Solar energy is considered a renewable clean energy source, essential for the future. The northeastern Brazil has geographical and climatic characteristics that favor the generation of photovoltaic solar energy. Thus, the objective was to compare the economic feasibility of collecting units of solar energy in homes of Paraiba hinterland to that provided by the local dealership in the grid. We evaluated the average cost paid by residents of that locality using the utility power compared to the use of photovoltaic solar energy including values for installation and maintenance of  equipment. It was concluded that the using solar energy is more viable, as the final cost is less than the power supplied by the utility. In addition, it allows a  possible increased in micro generation, resulting in regional energy potential increasing. KEYWORDS: Solar energy, Backlands of Paraiba, Economic viability, Sustainability.

ANÁLISE DE VIABILIDADE ECONÔMICA ENTRE O USO DE ENERGIA EM GRID E A SOLAR NO SERTÃO PARAIBANO