India's largest power generator, NTPC, has announced the allocation of 5 gigawatt-hours (GWh) of Battery Energy Storage System (BESS) projects. These systems are designed to store power generated by its coal-based thermal plants, specifically addressing the nation's escalating peak electricity demand.
Traditionally, battery storage has been primarily associated with renewable energy sources to compensate for their intermittent nature. However, NTPC's new strategy integrates BESS directly with thermal power stations. This allows these plants to remain online and dispatch additional power during peak consumption hours, optimizing their operational efficiency and ensuring grid stability.
Strategic Deployment and Funding
The 5GWh BESS projects were allocated to NTPC under the Viability Gap Funding (VGF) scheme, supported by the Power System Development Fund (PSDF). This strategic move aims to enhance the utilization of existing thermal generation and transmission infrastructure, providing a more reliable and cost-effective power supply, particularly during non-solar periods.
The allocated battery storage capacity will be integrated across 14 NTPC thermal power stations. These locations were selected based on the availability of Unrequisitioned Surplus (URS) power, ensuring optimal synergy with existing assets.
Meeting Soaring Demand and Regulatory Framework
The urgency for such measures is underscored by India's rapidly increasing electricity consumption, with peak power demand recently touching a record 270GW. Power generators are exploring all avenues to meet this demand without compromising grid reliability.
Supporting this integration, the Central Electricity Regulatory Commission (CERC) issued regulations on March 20, 2026, governing the determination of tariffs for Battery Energy Storage Systems installed at thermal generating stations. This regulatory clarity provides a framework for the financial viability and operational guidelines of these new systems.
Operational and Economic Advantages
Integrating BESS with thermal plants offers multiple benefits. Operationally, it reduces the need for frequent cycling of thermal units, allowing them to run closer to their optimal efficiency. This not only lowers maintenance and operational costs but also extends the overall lifespan of the power plant components.
Economically, the battery storage systems address a critical challenge: the high cost associated with running thermal power plants at low capacities to accommodate higher renewable energy injection into the grid during daylight hours. By absorbing excess energy when renewables overproduce and discharging it when they underperform, especially in the evenings, BESS enables a more stable and cost-efficient power supply across the grid.