"The curtailment of renewable energy is not merely a technical failure but a governance and regulatory challenge." Discuss with reference to India's BESS policy ecosystem.

Curtailment — the deliberate throttling of renewable output when the grid cannot absorb it — appears technical, but in India it persists mainly because storage procurement, tariff design and DISCOM incentives lag behind solar capacity addition. NITI Aayog's Energy Storage System Roadmap (2019–32) flagged this integration gap well before capacity peaked [1].

The technical face is real but partial

• Solar's share of installed capacity far exceeds its share of evening generation; the "sunset gap" forces surplus midday power to be curtailed while thermal peakers meet night demand.
• CEA now advises co-location of storage at ≥10% of installed solar capacity for a minimum two hours to improve dispatchability [2].

Regulatory dimension

• Energy Storage Obligation, notified by the Ministry of Power (2022), sets a rising trajectory to 2029–30, but enforcement on DISCOMs remains weak [2].
• Tariff and connectivity rules initially treated storage as an appendage of generation; ISTS charge waivers for co-located BESS and revised connectivity norms are recent corrections [2].
• High discovered storage cost — ₹10.18/kWh in early bidding — reflects regulatory risk premium as much as technology cost [3].

Governance dimension

• Viability Gap Funding is the state's admission that markets alone will not build storage: ₹3,760 crore for 13,220 MWh (2024) [4], followed by 30 GWh with ₹5,400 crore from PSDF (2025) [5].
• VGF conditions that ≥85% of output be first offered to DISCOMs show public-utility prioritisation, yet weak DISCOM finances still deter long-term storage PPAs [6].
• Centre–State coordination, land acquisition and grid interconnection delays slow execution despite adequate funding.

Curtailment is therefore a symptom of institutional lag, not merely of physics. Aligning ESO enforcement, cost-reflective storage tariffs and DISCOM balance-sheet reform with the VGF and ACC-manufacturing push can convert stranded sunshine into firm evening power — making India's 500 GW non-fossil pledge operationally credible and advancing SDG-7.