The Solar Energy Corporation of India (SECI) has awarded eight point six GW of Inter-State Transmission System renewable capacity across solar, hybrid and battery storage tenders. SECI applied a standard trading margin of Rs zero point zero seven per kWh over discovered tariffs and most projects are expected to reach their Scheduled Commercial Delivery or Commercial Operation Date within 24 months of signing power purchase agreements. The allocations span pure solar, hybrid plus battery energy storage systems and manufacturing linked schemes.\n\nISTS Tranche-XXI Solar plus BESS awarded 1,200 MW, with NLC India Renewables and Engie Energy India winning capacity at tariffs of Rs three point one two per kWh and RPIL Power Three and Oriana Power Limited securing capacity at Rs three point one three per kWh. Under this scheme developers must supply normal solar output and provide 50 per cent of contracted capacity for six hours during morning and evening peak demand. The requirement aims to support grid stability during peak periods while integrating storage.\n\nThe larger ISTS Tranche-XX Solar plus BESS allocated 1,500 MW with most developers discovering tariffs of Rs two point eight six per kWh and others at Rs two point eight seven per kWh, while ISTS Tranche-XV awarded 500 MW to JSW Neo Energy Limited at Rs three point four two per kWh with a two hour evening supply obligation. Pure solar allocations included 600 MW split between Avaada Energy and ReNew Solar Power at Rs two point five seven per kWh. The Manufacturing Linked Solar Power Scheme recorded the lowest tariffs with Adani Green Energy Four securing 1,799 MW at Rs two point four two per kWh, although some projects may face additional costs from Basic Customs Duty.\n\nHybrid tranches attracted robust participation with Hybrid Tranche-IX awarding 600 MW and Hybrid Tranche-VIII allocating 1,200 MW at higher tariffs. Projects with advanced storage obligations recorded elevated tariffs reflecting the value of assured evening supply. These allocations underline the continued policy push to expand solar, hybrid and storage capacity on the ISTS platform while balancing tariff competitiveness and grid reliability.