India’s grid-scale Battery Energy Storage System (BESS) market has recorded surprisingly competitive tariff outcomes in recent standalone storage tenders awarded by Tamil Nadu and Kerala, defying expectations of rising prices amid escalating battery metal costs, currency volatility, and ongoing supply chain uncertainties.
The tender results reflect increasing market maturity, improving project execution confidence, and heightened competition, even as developers navigate a challenging global cost environment.
In Kerala, NTPC Vidyut Vyapar Nigam (NVVN) awarded a 250 MW / 500 MWh standalone BESS project with a requirement of 420 charge-discharge cycles annually over a 15-year contract period. Issued in October 2025 and concluded within three months, the tender witnessed aggressive bidding, led by Shreyas Sortex Industries Private Limited, which emerged as the lowest bidder at a tariff of ₹1.81 lakh per MW per month.
OPG Power Generation Private Limited followed closely at ₹1.82 lakh per MW per month, while Oriana Power Limited, DB Power BESS Storage Limited, NTPC Green Energy Limited, and Power Grid Corporation of India Limited secured capacities at tariffs ranging from ₹2.16 lakh to ₹2.246 lakh per MW per month.
The Kerala auction has drawn significant attention across the sector due to the sharp price discovery, especially given prevailing industry concerns around rising battery costs driven by higher lithium and nickel prices, changes in global battery export policies, and foreign exchange fluctuations. Market participants note that the outcome suggests developers are optimising project design, financing structures, and long-term operational strategies to remain competitive.
Meanwhile, in Tamil Nadu, the energy arm of Tamil Nadu Generation and Distribution Corporation, TNGECL, awarded a 375 MW / 1,500 MWh standalone BESS project, marking one of the largest grid-scale storage procurements in the country to date. Issued in November 2025, the tender introduced a 1.5-cycle daily operational requirement over 15 years, a first for India’s BESS sector, raising technical performance expectations.
Despite the higher cycle requirement and longer discharge duration, the lowest discovered tariff stood at ₹3.15 lakh per MW per month, with Eagle Construction Company securing capacity at the benchmark price. OPG Power Generation, Onward Solar Power, FORCEOne SD, Brics Renewable Energy, and Sri Srinivasa Constructions followed, with bids ranging between ₹3.16 lakh and ₹3.32 lakh per MW per month.
Industry experts view the Tamil Nadu tender as a key milestone for India’s BESS market, demonstrating growing developer confidence in executing high-performance, long-duration storage projects without significant tariff escalation.
Together, the Kerala and Tamil Nadu tenders underscore shifting market dynamics, improving cost efficiencies, and intensifying competition, reinforcing BESS as a central component of India’s evolving grid architecture and energy transition strategy.
