The study focused on Adoption and Upscaling Up of Rooftop Solar PV deployment in urban centres using Nairobi city as the case study. Urban centres in Africa and Asia continents are growing at a high rate due to rapid rural-urban migration and urban internal growth hence need for an alternative and sustainable energy source. Rooftop solar PV deployment remains the main viable option that can be deployed across all electricity consumer categories. The report covered the following: an overview of the solar PV sector in Kenya; a review of already existing rooftop solar projects within Nairobi city and its outskirts; analysis on the existing financing options and business models applied and recommendations on business opportunities and gaps that can be utilized to scale up rooftop Solar PV deployment in urban centres