This lecture covers the journey of photovoltaics from fundamental research to mass market production, focusing on technology transfer, industrial partnerships, and the development of advanced devices. It discusses the infrastructure, testing facilities, and research activities at EPFL and CSEM, including battery research, energy management optimization, big data analysis, and predictive maintenance. The lecture also explores the challenges and opportunities in the global energy sector, emphasizing the importance of sustainability, efficiency, and the transition to renewable energy sources.