This paper examines financing models for clean energy adoption, drawing insights from experiences in the United States and Nigeria. It underscores the significance of clean energy and the need to explore effective financing mechanisms to facilitate its widespread adoption. Through an analysis of the current state of clean energy adoption in both countries, existing initiatives and challenges are outlined. Lessons gleaned from successful financing models in the United States, including government incentives, public-private partnerships, and renewable energy credits, are then explored. These lessons serve as a foundation for assessing how similar approaches can be adapted to the Nigerian context. Specific attention is given to the unique challenges facing Nigeria, such as infrastructure limitations and socioeconomic disparities, and how financing models can be tailored to address these obstacles. A comparative analysis between the two countries identifies similarities, differences, and the potential transferability of financing models. Based on these insights, recommendations are proposed for Nigeria, emphasizing the importance of context-specific approaches to accelerate clean energy adoption. Overall, this paper provides a comprehensive exploration of financing models for clean energy adoption, offering valuable insights for policymakers, stakeholders, and practitioners in both the United States and Nigeria.