This book presents a transformative policy model for the emergence of Solar Photovoltaic Electricity (PV) in Brazil from a socio-technical view of innovation. The objective of this research was to identify how technology transition management happens and propose a new transformative policy model to promote the use and dissemination of PV energy in Brazil. To reach this goal, initially, we reviewed the fundamental aspects of socio-technical innovation theory, with the theoretical framework of three complementary approaches: innovation systems, multilevel perspective and the functions of innovation system. Such theories have enabled clarifying of the dynamics inside the innovation system, the actors' roles as well as the challenges and opportunities for the emergence of this technology in the national context. Qualitative methodology was used with the application of content analysis techniques, thematic category analysis and written data analysis. Data collection involved 21 in-depth interviews with relevant stakeholders in Brazil and Germany, as well as written data analysis of 69 national documents and 18 documents from Germany. sakriti opis