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The development of financial analysis methodologies for the investment return in photovoltaic distributed generation in Brazil is of interest to residential electricity consumers. In this sense, the objective of this study is to evaluate the financial impact of binomial tariff application on investment return in photovoltaic distributed generation for residential consumers, considering the changes proposed in Brazilian electric sector regulation. The paper consists in the comparison of economic indexes using the current residential tariff and tariff models proposed by the electric sector regulatory agency in recent public consultations. The methodology is based on definition of the energy generated by the photovoltaic systems, financial parameters, technical parameters and obtaining economic indexes. The investment attractiveness in photovoltaic solar generation is first calculated with the current tariff model, the second case is based on the Public Consultation no. 33 of 2017 and the third case is developed considering the Public Consultation no. 10 of 2018. The methodology proposed and results obtained aim to contribute to the development of a fair legislation for investors and agents in electric sector.

The market of electric and hybrid vehicles is still small compared to the market of combustion vehicles. However, this is an ever-expanding market. This paper aims to model the increase in electrical vehicles market in Brazil, which could help the electrical demand forecasting for electricity distribution utilities. The System Dynamics and the Bass Diffusion Model are used to represent the proposed system of the electrical vehicle market, first with a qualitative and then with a quantitative model. Three scenarios are simulated to test and validate it. The results show that the methodology used in this paper is adequate to model the system using different nature parameters, such as behavioral, strategic and economic.