[01] Daniela Coelho Rodrigues de Souza, Electrical Engineering Department, Fluminense Federal University, Niteroi, Rio de Janeiro, Brazil. [02] Douglas Aranil Magalhães Barbosa, Electrical Engineering Department, Fluminense Federal University, Niteroi, Rio de Janeiro, Brazil. [03] Diogo Augusto Magalhães, Electrical Engineering Department, Fluminense Federal University, Niteroi, Rio de Janeiro, Brazil. [04] Márcio Zamboti Fortes, Electrical Engineering Department, Fluminense Federal University, Niteroi, Rio de Janeiro, Brazil. [05] Bruno Soares Moreira Cesar Borba, Electrical Engineering Department, Fluminense Federal University, Niteroi, Rio de Janeiro, Brazil.

Nowadays, the increasing of implematation distribuited generation around the word has stimulared the development of several research taking into account the impact of this gerneration, However, in most cases such research is related to the electrical problems that the distribution grids will face with the insertion of this new source and few articles aim to study the economic impact to the user if they choose a products of dubious quality. Therefore, this article was developed with the motivation of the growth of this type of generation in the Brazilian territory, much justified by some aspect like: the high energy tariff, the incentives that some users receive with the installation of this equipment and the decrease of the installation cost of such system. Thus, the article aims to conduct an economic feasibility study, focusing mainly on payback time, for two types of photovoltaic systems differentiated only by the certification of the Brazilian quality control organizations. Two scenarios will be analyzed, the first one supposes that the both system will operate with the loss reported by the manufacturers and the second one will assume a larger drop in the loss that was reported by the manufacturer for the uncertified product, and the impact of this will be analysi in the payback time. So, this work will use grid systems to survey the economic study and will be presented in a basic way, such as energy compensation policy, the criteria to be considered during the design of the system, and the criteria to be performed for the study of payback.

Solar System, Economic Analysis, Payback Time

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