This handbook attempts to demystify the process of implementing a rooftop solar project by providing a step-by-step guide. It covers the initial stages of how to conduct a feasibility assessment, how to finance a system, and how to ensure proper operations and maintenance. It answers questions dealing with the permits required, available incentives and financing options, procurement, and installation considerations including safety issues. It provides examples from the Asian Development Bank's experience installing a rooftop solar power system on its headquarters in Manila, in the Philippines.