For better implementation of renewable energy projects, especially wind and solar, the Solar Energy Corporation of India (SECI) has written to the Power Grid Corporation of India Limited (PGCIL), the Central Transmission Utility (CTU) of India that is responsible for the transmission of electricity through Inter-State Transmission System (ISTS). In its letter, SECI has provided PGCIL with tentative plans of tendering capacities under its programs for solar and hybrid projects up to 2021.