🗞️ Why in News The Union Cabinet approved on 30 September 2026 the Green Energy Corridor Phase-III (GEC-III) scheme, with a total outlay of Rs 1,86,405 crore, to strengthen the Intra-State Transmission System (InSTS) so that up to 135 GW of renewable energy can be evacuated, and, for the first time in the programme, to deploy 50 GWh of Battery Energy Storage Systems (BESS). The scheme is to be completed by 2032-33.
The Scheme at a Glance
| Component | Detail |
|---|---|
| Total outlay | Rs 1,86,405 crore |
| Intra-State transmission (InSTS) | Rs 1,36,378 crore; evacuation of up to 135 GW of renewable energy across States and Union Territories |
| Battery storage (BESS) | Rs 50,000 crore for 50 GWh, at renewable generator sites or other grid locations |
| Central Financial Assistance (CFA) | Rs 54,082 crore (roughly 29 per cent of the outlay, by our arithmetic), to offset intra-State transmission charges and keep tariffs down |
| Target year | FY 2032-33 |
| Implementing agencies | State Transmission Utilities (STUs) overall |
| Delivery model | Greenfield lines by Tariff Based Competitive Bidding (TBCB), with Transmission Service Providers on a Build-Own-Operate-Maintain (BOOM) basis; brownfield upgrades on a Cost Plus basis |
| Stated aim | Help reach 900 GW of installed non-fossil capacity by 2035 |
Why the Grid, Not the Panels, Is the Bottleneck
India can now build solar and wind farms faster than it can build the lines to carry their power. The Indian Express, citing government data, gives the scale of the mismatch:
- About 21 GW, roughly 9 per cent of installed renewable capacity, is connected through temporary grid access while waiting for dedicated lines; around 12 GW of it faces restrictions on evacuation at peak solar hours.
- In FY26, about 6,900 GWh of clean electricity faced such restrictions.
- In April to June 2026, when peak demand touched a record 270 GW, grid operators curtailed 8,133 GWh of solar generation, roughly a day and a half of national consumption, the Ministry of New and Renewable Energy told Parliament in July.
Curtailment is when the grid operator orders a plant to reduce output, either because lines are congested or to keep the grid stable. It wastes clean power, cuts developers’ revenue and makes future projects harder to finance.
Why storage is in a transmission scheme. Solar output peaks at midday, while demand peaks in the evening. Batteries placed at generator sites can absorb midday surplus (reducing curtailment and the need for bigger lines) and discharge after sunset (meeting non-solar hour demand). In effect, storage is a substitute for some transmission capacity.
The Programme So Far
| Phase | Network | Status (government data cited by The Indian Express) |
|---|---|---|
| GEC Phase I | Intra-State lines in eight States: Andhra Pradesh, Gujarat, Himachal Pradesh, Karnataka, Madhya Pradesh, Maharashtra, Rajasthan, Tamil Nadu (with an inter-State component built by POWERGRID) | 9,130 ckm built by 30 June 2026 against a target of 9,461 ckm |
| GEC Phase II | Intra-State lines in seven States: Gujarat, Himachal Pradesh, Karnataka, Kerala, Rajasthan, Tamil Nadu, Uttar Pradesh | Target 7,863 ckm and 24,388 MVA; 1,124 ckm charged and 6,860 MVA commissioned by 30 June 2026 |
| GEC Phase III | All States and UTs; 135 GW; first with BESS | Approved 30 September 2026; due by 2032-33 |
A parliamentary committee has flagged delays, chiefly over compensation for right of way (RoW), the land a line passes over.
Inter-State and Intra-State: Who Builds What
| Feature | Inter-State Transmission System (ISTS) | Intra-State Transmission System (InSTS) |
|---|---|---|
| Carries power | Between States and regions, from large renewable parks | Within a State, from substations to distribution networks |
| Planned by | Central Electricity Authority and the Central Transmission Utility | State Transmission Utilities |
| Charges | ISTS charges waived for many renewable projects commissioned within deadlines | Intra-State charges borne by State consumers, which is why CFA matters |
Analysis
1. The right problem. The binding constraint on India’s energy transition has shifted from generation to grids and storage. A transmission scheme with storage attached targets that constraint directly.
2. Federal design. Electricity is in the Concurrent List. Intra-State networks belong to the States, but their customers would pay for lines that mainly serve national climate targets. Central assistance aligns the incentive.
3. Execution risk. Phase II’s slow progress (1,124 ckm charged against 7,863 ckm planned) shows that right of way, land compensation, forest clearances and State utility finances decide the pace, not the outlay.
4. Storage at scale is new. 50 GWh is a big order. It will test domestic cell manufacturing (the PLI for Advanced Chemistry Cells), safety standards, and market rules that let batteries earn from both energy and grid services.
5. The climate arithmetic. India’s targets aim for about 500 GW of non-fossil capacity by 2030; the Cabinet release now speaks of 900 GW by 2035. Every gigawatt curtailed is a gigawatt that does not count in practice.
UPSC Relevance
GS Paper 3. Infrastructure: energy; conservation and environmental pollution (renewable energy and climate targets); investment models (TBCB, BOOM, cost plus). GS Paper 2. Centre-State relations in a Concurrent List subject.
A question worth preparing. “India’s renewable energy challenge has shifted from adding capacity to integrating it.” Discuss with reference to transmission and storage. (250 words)
The Mains framing. Open with curtailment data (21 GW on temporary access; 8,133 GWh solar curtailed in April-June 2026). Explain the duck curve, why storage complements transmission, and the GEC-III design (InSTS, 50 GWh BESS, CFA). Discuss right-of-way delays, State utility finances and battery supply chains. Conclude with market reforms (storage and ancillary services markets), green open access and faster clearances.
📌 Facts Corner, Knowledgepedia
Prelims, statement-ready facts:
- GEC-III approved by the Union Cabinet on 30 September 2026; outlay Rs 1,86,405 crore.
- InSTS component Rs 1,36,378 crore; evacuation of up to 135 GW of renewable energy.
- 50 GWh of BESS for Rs 50,000 crore: the first storage component in the GEC programme.
- Central Financial Support Rs 54,082 crore; completion by FY 2032-33.
- Greenfield lines via TBCB on a BOOM model; brownfield works on Cost Plus; STUs implement.
- Ministry: New and Renewable Energy (MNRE); Phase I in 8 States, Phase II in 7 States.
Prelims, the traps:
- GEC-III is mainly intra-State (InSTS), not the inter-State grid.
- Curtailment means a plant is told to cut output; it is not a power cut to consumers.
- Electricity is in the Concurrent List (Entry 38, List III).
Mains, arguments and keywords:
- Grid as the new bottleneck; duck curve; storage as virtual transmission; right-of-way compensation; State utility finances.
Interview, be ready for:
- “Is battery storage worth subsidising when coal is cheaper at night?” Compare system costs, curtailment losses and climate commitments; storage costs are falling fast.
Sources: PIB, Cabinet approves Green Energy Corridor Phase-III (30 September 2026), The Indian Express, The Hindu, MNRE
Source: Green Energy Corridor Phase III: Rs 1.86 Lakh Crore for State Grids and 50 GWh of Battery Storage — Ujiyari.com | Free UPSC & State PCS Current Affairs
