This study comprehensively examines the manufacturing supply chain of different components used in RE (renewable energy) systems, especially wind and solar technology, in India. Over the past one and half years, around 90 interviews were conducted across the solar and wind industry comprising manufacturers, developers, system integrators, academicians and policy makers. A sourcing strategy for these components has been identified based on macroeconomic criteria, material and resource constraints, techno-economic feasibility and international market dynamics. The report also proposes necessary policy and regulatory interventions to expand the supply of RE and create a demand-side pull.