In the quest to tackle complex societal and environmental challenges, Norway stands as one of the nations that are increasingly incorporating and transitioning to renewable and green energy solutions, particularly solar energy and technologies. In this context, science and technology education, starting from an early age, have been highlighted as important to achieving carbon-neutrality goals and sustainable futures. That notwithstanding, a significant knowledge gap persists regarding young children's understanding and experiences with renewable energy and technologies. This study explores kindergarten children's STEM-related knowledge and experiences, particularly regarding solar energy and technologies. Specifically, the study focuses on a pioneering kindergarten in Stavanger, Norway, that relies on solar technologies for warmth and waste management. After using a comprehensive qualitative case study approach, the study's findings underscore the effectiveness of experiential learning and multi-method approaches within early education, particularly in enhancing children's knowledge about renewable energy and technologies.