Viabilidade técnico-econômica de um sistema fotovoltaico com compensação de créditos de energia para múltiplas unidades consumidoras estudo de caso em microgeração distribuída residencial sob a vigência da resolução normativa aneel 1000 de 2021 (ren 1000)

This work analyzes the technical and economic feasibility of installing a residential photovoltaic system aimed at credit compensation of energy for multiple consumer units linked to the same holder (CPF/CNPJ). The methodology combined bibliographic research, documentary analysis of energy bills, and a case study of a system in real operation. A customized spreadsheet was developed, which automates the calculation of generation, consumption, and redistribution of energy credits among the units involved. The results indicated that, even with the incidence of fixed charges such as the minimum tariff and the Public Lighting Contribution (CIP), the photovoltaic system showed high efficiency, generating monthly surpluses that allowed the progressive accumulation of credits and the reduction of the bill value. The payback period of the investment was estimated between 3.5 and 4 years, maintaining the economic attractiveness of the project. The analysis also demonstrated the importance of correct system sizing, the use of bidirectional meters, and the automation of calculations as a way to optimize the use of credits. The work concludes that distributed microgeneration can be a sustainable, financially advantageous, and technically replicable alternative in residential contexts.