Topic 9 of 19
GS Paper 3 Power Sector Evening peak shortfall, short-term power tenders and the case for resource adequacy and battery storage

Cheap at Noon, Scarce at Dusk: Who Pays for India's Evening Power Gap

Source PIB, Indian Express, IIT Kanpur, EQ Magazine, Mercom India

It is 6.30 on a December evening in Chennai. The sun has set, solar output has collapsed and Tamil Nadu's distribution utility is paying ₹41.50 for each unit it bought in advance for these hours, more than four times the ₹10 ceiling regulators allow on the power exchange. Even at that price, it secured less than half the power it asked for.

| | Topic 9 of 19

Summary

At least six States, Gujarat, Rajasthan, Maharashtra, Madhya Pradesh, Tamil Nadu and Keralam, have floated short-term tenders through the Ministry of Power's DEEP portal to secure extra electricity for November and December 2026, mainly to avoid evening shortages.

India's evening peak shortfall reached 5.8 GW in October as solar output drops after sunset and battery storage remains limited. Most States could not secure the full quantity they sought. Tamil Nadu paid the highest prices, up to ₹41.50 per unit, while Madhya Pradesh was the only State to receive its full request, at ₹3.99 to ₹5.50 per unit.

Gujarat, Delhi, Tamil Nadu, Madhya Pradesh and Maharashtra have also tendered for January to May 2027.

WHY IT MATTERS FOR UPSC & STATE PCS

Several States are scrambling to buy expensive short-term power for winter evenings after India's evening peak shortfall touched 5.8 GW in October 2026. The rush exposes the gap between India's fast-growing solar capacity and its limited ability to store daytime power for use after sunset.

Standard News

The Price of Sunset: How Solar Success Created an Evening Scarcity Market

India can now meet record demand of over 270 GW, yet in October 2026 the grid still fell 5.8 GW short in the evenings. The problem is not too little capacity overall. It is too little capacity at the right hour. Solar floods the grid at noon and disappears at sunset, just as homes switch on lights and fans.

Who is

actually paying Six States went to the DEEP portal for extra power in November and December. The results show how thin the evening market is.

  • Tamil Nadu sought 1,000 MW for December and got 401 MW. Of that, 361 MW cost ₹41.50 per unit.
  • Keralam sought about 1,800 MW for November and got 270 MW.
  • Rajasthan sought 1,500 MW for November and got 85 MW.
  • Maharashtra got nothing for its 500 MW November tender. Across November, the five States that tendered for the month sought roughly 6,800 MW and secured about 930 MW. The mechanism that turns this into a household cost is straightforward. A distribution utility or discom, buys most of its power under long-term agreements that can run 25 years. When those fall short at peak hours, it has two options:
  1. Buy on the power exchange, where quantities depend on whatever sell bids appear and prices are capped at ₹10 per unit.
  2. Run a short-term tender, which fixes quantity and period but has no such cap. Fearing blackouts during the festival season, discoms choose the tender. The extra cost then flows into the utility's power purchase bill. It is eventually recovered through consumer tariffs, absorbed as State subsidy or added to the discom's losses. A family in Chennai does not see ₹41.50 on its bill, but it pays for it one way or another.

Why this keeps happening India's battery storage capacity was just 5.9 GWh in March 2026.

Without storage, cheap midday solar cannot be moved into the evening. Industry insiders also point to El Niño-linked weather, higher irrigation demand and rising industrial activity as reasons for this year's surge. The contrast within the data is telling.

Madhya Pradesh secured its full 800 MW, from 20 November 2026 to 15 February 2027, at ₹3.99 to ₹5.50 per unit. States that planned for a season fared far better than those buying for a single peak month.

The fix is planning, not panic buying The Ministry of Power's Resource Adequacy guidelines of June 2023 already require discoms to contract enough firm capacity in advance.

The Viability Gap Funding scheme supports battery storage. The tenders show neither has yet caught up with solar's growth. California, which faced the same post-sunset "duck curve", built more than 21 GW of grid batteries by August 2026.

India's challenge is the same: storage and planning must grow as fast as solar. For GS3, this is the energy transition's hidden cost. Cheap renewables lower the average price of power, but without storage they raise the price of the hours that matter most.

Quick Facts

Key numbers & takeaways — revise these first

  • India's evening peak power shortfall reached 5.8 GW in October 2026.

  • India met an all-time high peak demand of 270.82 GW in May 2026.

  • Tamil Nadu paid up to ₹41.50 per unit for December 2026 short-term power.

  • Madhya Pradesh secured its full 800 MW request at ₹3.99 to ₹5.50 per unit.

  • The DEEP portal for short-term power procurement was launched by the Ministry of Power in 2016.

  • CERC caps the market clearing price in the Day-Ahead and Real-Time Markets at ₹10 per unit.

  • India's cumulative installed battery energy storage capacity was 5.9 GWh in March 2026.

  • The Viability Gap Funding scheme for battery storage was approved in September 2023 with ₹3,760 crore for 4,000 MWh.

  • The Ministry of Power notified Resource Adequacy guidelines in June 2023.

Beyond The Headlines
GS Paper 3 Evening peak shortfall, short-term power tenders and the case for resource adequacy and battery storage

Connect the dots for your UPSC preparation.

Standard news covers the event. Log in to read our comprehensive analysis and uncover the hidden constitutional, structural, and ethical dimensions of this topic:

1

The full State-by-State breakdown of what was sought, what was secured and at what price and what it reveals about evening scarcity.

2

How short-term procurement costs travel from a discom's balance sheet to consumer tariffs or State subsidies.

3

The California battery case study and what India's storage build-out must look like to match it.

4

A short-term and long-term way forward built on resource adequacy enforcement, storage and smarter demand management.

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Evening Peak Demand Duck Curve DEEP Portal Short-term Power Procurement Resource Adequacy Battery Energy Storage System Viability Gap Funding CERC Price Cap Day-Ahead Market Discoms Solar Energy Energy Transition GS3 Economy

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