Case study of the distributed generation photovoltaic system installation connected to electrical grid in a rest home: technical economic analysis of coast and benefit

Abstract

The photovoltaic solar power generation is increasing worldwide. This is also the case in Brazil, due to the favourable climatic conditions, electric energy high cost for consumers, among other factors. This study aimed to analyse the technical-economic viability and benefits of the installation of a photovoltaic distributed generation (PVDG) system of 20,1 kWp on grid by net metering regime, as an alternative to reduce costs and energy diversification. The methodology used was a case study in a rest home. As results obtained were: elaboration and comparison of 5 projects from different companies to choose the one winner project; economic-financial feasibility confirmation of the PVDG system. However, depending on the possible regulatory changes proposed by the Brazilian electricity sector regulator agent, the electricity bill benefit can be reduced by 28%, 34%, 42%, 50% or 62%, significantly undermining the planned payback.