India’s clean energy transition: India has crossed 300 GW of non-fossil power capacity, and the 500 GW target for 2030 is no longer the stretch it once appeared to be. That is the reassuring part of the story. The less comfortable one is visible in the gap between capacity and generation. Solar and wind plants can be added quickly; the electricity system that must carry their output cannot. Transmission lines take longer to build, storage remains inadequate and the evening peak still has to be met after solar generation falls away. India is approaching the stage where adding another gigawatt will matter less than making better use of the gigawatts already connected to the grid.
This changes the nature of the policy problem. For much of the past decade, success could be measured in auctions won, tariffs discovered and capacity commissioned. Those numbers still matter, but they say little about whether renewable electricity is available at the hour it is required. Congested transmission can strand generation. Too little storage can leave cheap afternoon power with few takers while coal plants return to meet evening demand. The weakness is increasingly in the system around renewable generation, and that is where investment and policy attention now have to move.
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Renewable capacity is running ahead
The electricity system was built around large thermal stations supplying power through transmission and distribution networks to consumers. Solar and wind have changed the operating conditions.
Solar output rises during the day and falls rapidly towards evening. Wind depends on location and weather. Rooftop solar adds generation inside distribution networks that were designed largely for one-way flows. Grid operators must now deal with larger swings in supply, more decentralised generation and sharper changes in the amount of conventional power required at different hours.
India has more renewable capacity coming. As of June, 147.72 GW of renewable capacity was under construction, including almost 120 GW of solar and 27.72 GW of wind. Another 47.83 GW was in various stages of planning. The question is whether transmission, storage and distribution investment can keep pace.
The government recognises the problem. Its transmission planning now explicitly aims to reduce congestion and curtailment and make better use of existing networks. The Draft National Electricity Policy, 2026 also gives greater weight to grid flexibility and generation-transmission coordination, particularly for variable renewable projects whose construction periods can be considerably shorter than those of transmission systems.
Storage becomes part of the power system
Storage is the most obvious gap between renewable capacity and dependable electricity supply. Cheap solar power in the afternoon has limited value if it cannot be carried into hours when solar generation falls and demand remains high. Without sufficient flexibility, the grid can have surplus renewable power during some hours while continuing to depend on coal during others.
The Central Electricity Authority estimated that India would require 82.37 GWh of storage by 2026-27. By 2031-32, the requirement rises fivefold to 411.4 GWh, comprising 175.18 GWh of pumped storage and 236.22 GWh of battery storage.
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Investment is now gathering pace. By June 2026, 15.75 GW of battery storage with 42.53 GWh of energy capacity was under construction, while another 11.75 GW had been awarded. Pumped-storage projects totalling 15.87 GW and 95.22 GWh were also under construction.
Policy has begun to catch up as well. In February 2025, the CEA advised renewable energy agencies and utilities to include at least two hours of co-located storage equivalent to 10% of capacity in future solar tenders. The direction is sensible, but storage needs to become a routine part of resource planning and procurement rather than a separate category added when balancing problems emerge.
Transmission must arrive on time
Transmission presents a different problem. India does not have a nationwide shortage of inter-regional transmission capacity. The Ministry of Power says the national grid is adequate for overall transfers between regions. The difficulty lies increasingly in matching new generation with transmission at the right locations and on the same timetable. Right-of-way and clearance problems continue to delay individual projects.
The scale of the planned expansion is substantial. The network at 220 kV and above stood at 5.09 lakh circuit kilometres in June 2026 and is expected to reach 6.48 lakh circuit kilometres by 2032. Inter-regional capacity is planned to rise from 120 GW to 168 GW over the same period.
New lines are only part of the answer. Existing corridors can carry more electricity through reconductoring and technologies such as dynamic line rating and flexible AC transmission systems. Synchronous condensers can provide the system strength that becomes more important as conventional rotating generation accounts for a smaller share of capacity.
These technologies have moved into official planning. The Draft National Electricity Policy proposes wider use of storage, FACTS, synchronous condensers and dynamic line rating. The National Electricity Plan for transmission also envisages higher-performance conductors and other measures to increase the capability of existing corridors.
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DISCOMs need to buy reliability
The next reform concerns what distribution companies buy. India’s renewable expansion was built largely through technology-specific auctions. That model drove down tariffs and created scale. It is less suited to a system in which the value of electricity increasingly depends on the hour in which it is supplied and the ability of generators or storage operators to respond to changes in demand.
Procurement is already moving towards hybrid, round-the-clock and firm dispatchable renewable energy contracts. The Draft National Electricity Policy goes further by proposing resource-adequacy plans based on least-system-cost procurement. That is the correct principle. A DISCOM’s objective should be to secure reliable electricity at the lowest system cost, rather than accumulate separate quotas of solar, wind and storage.
Distribution networks themselves also need better information. Smart meters can improve energy accounting, identify high-loss areas and give utilities a clearer picture of demand. The rollout has accelerated: 7.24 crore smart meters had been installed across schemes by early August 2026, including 5.73 crore under the Revamped Distribution Sector Scheme. The programme remains far from complete, with 20.33 crore meters sanctioned under RDSS.
There has been measurable improvement in distribution performance. Aggregate technical and commercial losses fell from 21.91% in FY2021 to 15.04% in FY2025. That cannot be attributed to smart meters alone; tariff reforms, better collections, subsidy discipline and other measures have contributed. The important point is that financially stronger and better-informed DISCOMs will be better placed to procure storage, manage demand and invest in their networks.
India has demonstrated that it can build renewable generation at scale. The next test is less visible and more difficult. A 500 GW system will have little meaning if clean electricity is stranded, curtailed or unavailable in the hours when consumers value it most. From here, the success of the transition will increasingly be measured at the other end of the wire: whether electricity from those assets reaches homes, farms and factories when it is needed, and at a price the system can sustain.