India’s power sector in 2026: The grid will decide the outcome

India’s power sector no longer faces a generation constraint; it faces a grid constraint. By the end of 2025, India crossed 510 GW of installed capacity, with non-fossil sources accounting for more than half. Renewable additions remained strong, and annual investment across the power value chain approached ₹4 lakh crore. Capital availability, policy intent, and developer appetite are firmly in place.

Yet, the most visible stress in 2025 was not at the power plants; it was in transmission availability. Power was added faster than the grid could absorb and transmit it. At this scale, outcomes are no longer determined by how quickly renewable assets are built, but by whether the grid can integrate them reliably.

Transmission expanded in 2025 but system readiness lagged

FY25 was one of the most active years India has seen in transmission project rollouts. Inter-state transmission projects were awarded at record levels, largely through tariff-based competitive bidding (TBCB), bringing strong private participation into grid expansion. High-capacity corridors, pooling substations, and evacuation networks moved into execution across renewable-rich states. Importantly, capital and developer appetite were not the constraints. The challenge lay in transmission planning and sequencing.

In several regions, generation projects reached commissioning milestones ahead of evacuation readiness. In parts of Rajasthan and western India, 7-9 GW of solar and wind capacity came online before corresponding transmission corridors and substations were fully operational. The result was predictable: significant curtailment during high-generation hours and limited transmission margins, exposing structural gaps in current planning approaches.

When system planning does not ensure transmission readiness ahead of generation—particularly at regional and intra-state levels—the grid absorbs stress through congestion, volatility, and curtailment. Capital efficiency deteriorates, dispatch certainty weakens, and grid operators are forced into continuous intervention.

Why 2026 is a system inflection point

2026 is not a year of continuation; it is an inflection point. As peak demand moves steadily towards 300 GW and renewable penetration deepens, the grid’s role shifts from evacuation to stabilisation. Transmission is no longer just about moving power across regions. It is about maintaining frequency, managing congestion dynamically, and ensuring reliability during evening peaks and extreme weather events.

At this stage, system weakness does not manifest as widespread outages. It shows up as persistent congestion, declining effective utilisation of renewable assets, and rising operational interventions. These are early warning signals of grid stress—not generation inadequacy. If left unaddressed, they will increasingly shape market outcomes and investor sentiment.

Execution risks have become system risks

India’s next phase of transmission expansion will be defined by two parallel needs: long-distance inter-state transmission corridors and intra-state grid upgrades to support rising industrial and consumer demand. As renewable zones scale and demand grows, new transmission infrastructure is no longer a growth enabler—it is a system necessity.

Execution risk today is concentrated in equipment availability, especially for HVDC projects, execution capability, and delivery timelines. Continued dependence on imported critical power equipment amplifies this risk. Delays caused by equipment constraints do not remain localised. A delayed corridor pushes congestion into adjacent regions, increases curtailment elsewhere, and weakens the grid’s ability to absorb new generation.

At current reserve margins, these effects compound quickly. Supply-chain fragility has become a grid-stability issue, not merely an industrial concern.

Technology as a catalyst for grid efficiency and de-risked execution

Transmission is a sector that has historically seen limited technology adoption during execution. In India, building a transmission line still requires 1,500-1,600 man-days per circuit-km, compared with 250–300 man-days in more mechanised global markets. This productivity gap is no longer sustainable.

Reducing dependence on manual labour through technology-led construction methods is essential to accelerate execution and manage workforce constraints.

Equally important is how we operate the grid once assets are built. Today, most transmission networks operate on static design assumptions rather than real-time performance. India must adopt Dynamic Line Rating (DLR), predictive analytics, and advanced grid-monitoring tools to unlock unused capacity, improve utilisation, and reduce curtailment—one of the most persistent pain points for renewable developers.

Competitive bidding as a system-control mechanism

Tariff-based competitive bidding has delivered measurable outcomes in India’s transmission sector: cost discipline, accountability, private capital mobilisation, and predictable execution. Its role in scaling inter-state transmission over recent years is well established.

What is now evident is that competitive bidding is not merely a procurement reform; it is a system-control mechanism.

As grid upgrades move closer to load centres—where right-of-way constraints, land challenges, and execution complexity increase—the discipline imposed by competitive bidding becomes even more critical. Yet, adoption remains uneven across states, particularly at the intra-state level. This inconsistency introduces avoidable execution and timing risks into a system that is already under strain.

At this stage of the transition, standardising competitive bidding across both inter-state and intra-state transmission is essential. Without it, execution discipline weakens precisely where the grid needs it most.

What 2026 must get right

Transmission infrastructure must now be the primary focus, as India is again expected to add 40-50 GW of renewable capacity annually. In 2026, priorities must shift decisively:

• First, transmission planning must move from reactive to anticipatory, with corridors commissioned ahead of generation

• Second, grid investments must prioritise stability as much as capacity through advanced tools and technologies—substations, protection systems, and control infrastructure will matter as much as line kilometres

• Third, domestic manufacturing of advanced grid technologies must be strengthened to reduce supply-chain risk

• Finally, all inter-state and intra-state transmission projects should be allocated through the TBCB route to ensure cost discipline and predictable execution timelines

India’s energy transition has reached a phase where ambition and capital are no longer the constraints. Alignment between generation growth and grid capability is. In 2026, the outcome will not be decided by how much power India can generate; it will be decided by whether the grid is strong, stable, and prepared to carry that power at scale.

(The author is chairman, Resonia and Serentica Renewables; and managing director, Sterlite Electric. Views are personal.)