Whalesbook
THE SEAMLESS LINK
The push for enhanced energy storage capacity is a direct response to India's rapid expansion of renewable energy sources like solar and wind. These variable sources, while essential for decarbonization, introduce significant grid stability challenges, particularly during peak demand hours when generation is limited. The Central Electricity Authority (CEA) forecasts a substantial requirement, projecting a need for 411.4 GWh of energy storage by 2031-32, a figure that underscores the urgency for robust solutions.
The New VGF Initiative's Strategic Scope
In response, the Ministry of Power has forwarded a proposal for a new Viability Gap Funding (VGF) scheme to the Department of Expenditure for approval. This initiative is designed to provide a significant impetus to both Pumped Storage Projects (PSPs) and Battery Energy Storage Systems (BESS), aiming to foster large-scale adoption among stakeholders navigating grid variability. While a VGF scheme for BESS is already in implementation, offering up to 40% of capital cost as budgetary support and targeting 4,000 MWh by 2030-31, the new scheme's distinct focus includes PSPs, which were absent in earlier VGF iterations [cite: 2, 3, Scraped News]. The government previously notified guidelines to promote PSPs in April 2023, recognizing their critical role.
Differentiating Storage Technologies for Grid Needs
While Battery Energy Storage Systems (BESS) are well-suited for short-duration storage needs, offering flexibility, they face challenges such as limited lifespans of around 15 years and concerns regarding waste disposal and recycling. Pumped Storage Projects (PSPs), often termed 'water batteries', are ideal for long-duration energy storage. Globally, PSPs account for over 95% of installed energy storage capacity. PSPs offer a mature, proven technology with a service life of 70-100 years and are more cost-effective for extended storage durations, which are increasingly crucial for balancing renewable-heavy grids. India's own estimated PSP potential is substantial, with the CEA identifying approximately 267 GW.
Market Context and Future Outlook
The Indian energy storage market is projected for significant growth, with an estimated size of 233.78 MWh in 2024 expected to reach 6,637.31 MWh by 2033, a compound annual growth rate of 41.70%. The Economic Survey highlights that policy, regulatory, and financial measures are being implemented to meet these targets, including integrating energy storage into the 'harmonised master list of infrastructure' to improve access to finance. The total estimated funding requirement for PSP and BESS development from 2022 to 2032 is projected to be substantial, with figures around Rs 54,203 crore for PSPs and Rs 56,647 crore for BESS. This proactive governmental support, through schemes like VGF and broader policy frameworks such as the National Electricity Policy, signals a commitment to securing energy independence and achieving ambitious renewable energy goals, despite challenges like grid flexibility shortfalls, which led to solar power curtailment in 2025.