This paper adopts an analytical framework for understanding the impact of renewable energy projects on public finances, specifically the impact of the development of large-scale solar power plants, in order to assess their contribution to the process of sustainable energy transition. The selected analyt- ical framework helps classify, quantify, aggregate and compare data on social and economic impacts in a comprehensive manner. This research demonstrates that the transition to sustainable energy not only benefits the environment, but also reduces the cost of electricity production by up to 30% when compared to energy from unsustainable sources. This is eventually reflected in the cost borne by the consumer, generating revenues for the government, the private sector and electricity distribution agen- cies from private companies, municipalities and local councils. Moreover, the transition to sustainable energy has a positive, external economic impact on GDP, creating more jobs, stimulating the economy and improving infrastructure.