"Energy storage is the missing link in India's clean energy transition." Examine with reference to the recent Viability Gap Funding scheme for grid-scale storage.

India will need 411 GWh of grid-scale energy storage by 2031-32 [1]. Solar and wind power is produced when the sun shines or the wind blows, not when demand peaks. Without storage, more renewable capacity cannot reliably replace coal. The Cabinet's ₹14,500 crore Viability Gap Funding (VGF) scheme (2026-27 to 2030-31) treats storage as this missing link.

Why storage is the missing link

• Intermittency: solar output peaks at midday, but demand peaks in the evening. Storage moves the surplus power to peak hours.
• Curtailment and coal lock-in: without storage, surplus renewable power is wasted, and coal or gas plants are still needed for peak demand.
• Grid stability: batteries respond in seconds and help balance frequency as more renewable power enters the grid.

How the VGF scheme addresses it

• Scale: 92 GWh of new capacity (60 GWh pumped storage, 30 GWh batteries, 2 GWh other technologies). This equals 170% of present capacity [1].
• Leverage: ₹14,500 crore of VGF is expected to bring in ₹97,600 crore of investment [1].
• Portfolio approach: pumped storage provides long-duration storage, and batteries give fast, modular response.
• Market discipline: tariff-based competitive bidding, with both public and private discoms eligible [1].
• Make in India: the scheme supports domestic battery storage manufacturing [1]. It widens the earlier battery-only, PSDF-funded VGF [2].

Gaps that remain

• Award is not the same as building: under the 2025 battery VGF, purchase agreements covered 19.65 GWh, but only 5 GWh reached financial closure [3].
• Funding shortfall: even with all schemes combined, more than half of the 411 GWh has no VGF support [1][3].
• Timeline mismatch: pumped storage takes years to build and needs clearances. The scheme ends in 2030-31, but the target is for 2031-32 [1].
• Discom finances weaken payment security, and the VGF split between pumped storage and batteries is not disclosed.

Way forward

• Publish the VGF split by technology, and take back capacity from projects that stall before financial closure.
• Release pumped-storage VGF in instalments tied to construction milestones, and prefer off-river designs.
• Ensure payment security from discoms, and battery recycling under the Battery Waste Management Rules.

Storage turns renewable capacity into dependable supply. The VGF scheme is a decisive step, but its success should be judged by GWh commissioned, not GWh awarded. Fixing the gap between award and financing will make storage the bridge to India's Panchamrit commitments and SDG-7.