THE International Solar Alliance (ISA) that met in Delhi recently, is envisaged as a grand inter-governmental coalition of sun-rich nations, i.e., countries that lie fully or partially between the Tropics of Cancer and Capricorn. The objective of the ISA is to facilitate members to ‘collectively address key challenges to scaling up solar energy’. These ‘key challenges’, as understood by the ISA Framework Agreement, include solar finance, solar technologies, innovation, research and development, and capacity building.