India has rapidly expanded clean power, with renewable energy capacity reaching nearly 296 GW by August 2026. But the grid is struggling to absorb all the electricity being produced.
In the first quarter of 2026, transmission constraints alone accounted for about 300 GWh of renewable energy curtailment in India, highlighting a widening gap between power generation and the infrastructure needed to deliver it.
Why is India Producing Renewable Energy It Cannot Always Use?
India’s clean energy expansion has outpaced its electricity transmission network. As of 31 August 2026, India had about 295.6 GW of installed renewable energy capacity, including 168 GW of solar and 58.5 GW of wind. Adding nuclear capacity takes total non-fossil installed capacity to about 304.3 GW.
That is a substantial change from a decade ago. But installed capacity does not mean the same amount of electricity is being generated at every hour.
Solar farms, for example, produce most of their electricity during daylight hours. Wind output varies with weather conditions; demand, meanwhile, changes throughout the day and across regions.
This creates a basic grid problem: electricity must be generated and consumed at the same time unless it can be stored.
When more electricity is available than the grid can safely transmit or absorb, system operators can instruct renewable generators to reduce output. This is known as renewable energy curtailment.
It does not necessarily mean that the solar panels or wind turbines are broken. The electricity is available, but there may be no practical way to move or use it at that particular time.
The International Energy Agency describes curtailment as a situation in which the power system cannot absorb all available renewable generation because of transmission limitations, system stability requirements or a mismatch between supply and demand.
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What is Driving the Problem?
Multiple factors are contributing to the challenge.
- Transmission capacity is lagging generation: Renewable projects can be built relatively quickly, while new transmission lines require land acquisition, approvals, right-of-way clearances and coordination between multiple agencies.
- Solar and wind projects are concentrated in resource-rich states: Rajasthan and Gujarat have large renewable projects, but much of the electricity needs to travel to distant demand centres.
- Generation and transmission projects are not always commissioned together: A solar plant can be ready before the transmission infrastructure needed to evacuate its power.
- Storage remains limited: Batteries and pumped-storage projects can shift surplus daytime electricity into periods of higher demand, but deployment has not yet kept pace with renewable expansion.
- The existing power system remains dependent on coal: Coal plants still provide a large share of India’s actual electricity generation because they can operate for many more hours than solar or wind. The IEA estimated coal’s share of India’s electricity generation at 71% in 2025.
This distinction between capacity and generation is important.
A country can have hundreds of gigawatts of solar and wind capacity installed and still depend heavily on coal when renewable output is low.
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How Serious is India’s Renewable Energy Curtailment Problem?
The numbers show that the issue is no longer confined to individual projects. Data suggests that India curtailed about 470 GWh of renewable electricity in the first quarter of 2026. About 300 GWh, or nearly two-thirds, was due to transmission constraints. The Northern and Western regions accounted for most of the transmission-related losses.
On 30 March 2026 alone, about 34 GWh of renewable electricity was lost because of insufficient transmission margins, according to the Ember analysis.
The problem also became visible during the April-June period. India’s Ministry of New and Renewable Energy told Parliament that 8,133 GWh of solar electricity was curtailed during the quarter because of transmission constraints and grid-security requirements.
The scale matters because India is simultaneously trying to add large volumes of renewable capacity.
The Central Electricity Authority has already planned transmission systems to integrate more than 500 GW of non-fossil capacity by 2030. Its planning documents recognise that renewable projects can come online faster than associated transmission systems, making advance grid planning essential.
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Rajasthan Shows the Problem Clearly
Rajasthan has become one of India’s biggest renewable energy hubs because of its strong solar resource and large tracts of land.
But generation growth has also exposed transmission constraints. In 2025, renewable developers in Rajasthan showed significant curtailment during peak solar hours. The issue was linked to delayed transmission infrastructure and congestion around renewable-energy zones.
The problem was not simply a shortage of electricity demand. At times, power was available in Rajasthan but could not be moved efficiently to where it was required.
The government has since commissioned transmission infrastructure to evacuate renewable power from the state. In January 2026, MNRE Secretary Santosh Kumar Sarangi said curtailment in Rajasthan should ease as additional transmission infrastructure becomes operational, highlighting the need to synchronise generation and grid development.
Renewable generation projects can typically be built in about 18-24 months, whereas transmission projects take longer because of land, right-of-way, approvals and coordination requirements.
This mismatch between the speed of renewable additions and grid development is a major challenge. India’s annual renewable additions have grown sharply from the 10-15 GW range the grid had previously been absorbing.
The underlying issue is therefore less about India’s ability to build solar and wind farms and more about whether the rest of the electricity system can keep pace.
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Renewable Energy Curtailment vs Energy Shortage
| Issue | What happens | Main challenge |
| Renewable energy curtailment | Available renewable electricity is deliberately reduced | Grid cannot safely absorb or transmit it |
| Power shortage | Demand is greater than available supply | Not enough generation or transmission capacity |
| Transmission congestion | Electricity cannot move through a network segment at the required level | Insufficient or overloaded transmission infrastructure |
| Energy storage gap | Surplus electricity cannot be shifted to later hours | Limited battery and pumped-storage capacity |
| Coal dependency | Thermal plants continue supplying much of the electricity | Renewable output varies by time and weather |
This is why renewable energy curtailment in India should not be described simply as “India producing too much electricity”. The country can have surplus solar power at noon and still need additional generation in the evening.
The effects are spread across the electricity market. Here is what and who gains through the arrangement:
Renewable developers: Curtailment can reduce the amount of electricity projects can sell, affecting revenues and project economics.
Power consumers: Unused renewable generation means the system loses an opportunity to use low-emission electricity when it is available.
Grid operators: They must maintain frequency, voltage, and system stability while balancing variable renewable generation with conventional power.
Coal generators: Thermal plants remain important because they can provide more predictable output. However, increasing renewable penetration also requires them to operate more flexibly.
Transmission companies: Grid expansion becomes a critical part of India’s energy transition rather than a supporting activity that can be added later.
Battery and storage companies: Greater renewable penetration creates a growing market for battery energy storage systems, pumped-storage hydropower and other flexibility technologies.
Data centres and large industrial users: Companies with flexible electricity demand could increasingly use periods of high renewable generation to reduce costs and improve the renewable share of their power consumption.
What Can Solve the Problem?
Since the challenge is multi-faceted, there is no single fix. A lot can be done to reach a conclusive and stable phase.
1. Build transmission before generation arrives
India needs to plan transmission corridors alongside renewable-energy projects instead of waiting for generation capacity to be completed first.
The CEA’s transmission planning already takes this approach, developing networks for large renewable-energy zones and future non-fossil capacity.
2. Add battery storage
Battery energy storage systems can absorb excess solar electricity in the afternoon and discharge it when evening demand rises.
For example, a solar park producing more electricity than the grid can accept at 1 pm could charge a battery instead of reducing generation. That stored electricity could then be supplied at 7 pm when solar output has fallen.
Ember’s analysis has identified battery storage at renewable pooling stations as one possible short-term way to reduce transmission-related curtailment.
3. Expand pumped-storage hydropower
Pumped-storage plants work like large rechargeable batteries. They use electricity to pump water to a higher reservoir when power is plentiful. They release the water later through turbines to generate electricity.
India’s CEA is already incorporating pumped storage and battery storage into its long-term electricity planning.
4. Make demand more flexible
Not all electricity demand has to occur at fixed times.
Large factories, cold-storage facilities, electric-vehicle charging stations and data centres could increasingly schedule some consumption during periods when renewable electricity is abundant.
5. Improve grid forecasting and digital control
Modern grid management depends on accurate forecasts of solar output, wind generation and electricity demand.
Artificial intelligence, weather forecasting, sensors and real-time data can help grid operators anticipate changes and make faster decisions. But digital tools cannot replace physical transmission capacity. A smart grid still needs enough wires, substations and storage behind it.
Government Response and the Road to 2030
India’s policy challenge is now shifting from simply adding renewable capacity to integrating it efficiently.
The government has set a target of 500 GW of non-fossil fuel-based installed electricity capacity by 2030. The CEA has prepared transmission plans for integrating more than 500 GW and is also studying requirements for higher shares of renewable electricity.
In August 2026, the government was considering low-cost, long-tenure financing for renewable projects affected by transmission restrictions. The move aimed to ease financial pressure on developers whose projects cannot fully deliver power because of grid limitations.
The government’s broader challenge is sequencing.
Building more solar and wind without sufficient transmission and storage can increase curtailment. But delaying renewable projects until every part of the grid is ready can also slow the transition.
The answer is likely a more coordinated build-out of generation, transmission, storage, and flexible demand.
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What Happens Next for India’s Green Energy Grid?
The central question for India’s renewable transition is no longer simply how fast the country can install solar panels and wind turbines.
It is how much of that electricity can actually reach consumers.
Renewable energy curtailment in India signals that the transition is entering a more complex phase. Capacity additions remain essential, but transmission, storage, flexible generation and demand management now have to grow alongside them.
For businesses, the implications are practical. Renewable developers will need to assess grid connectivity and evacuation capacity as carefully as resource quality. Storage companies have an opportunity to become part of the grid infrastructure itself. Large electricity users can potentially shift consumption towards periods of high renewable output.
For policymakers, the lesson is similar: a gigawatt of installed capacity has limited value if the electricity cannot be delivered when and where it is needed.
India’s clean-energy target will therefore depend not only on building more generation, but on building a power system that can use it.
Frequently Asked Questions About Renewable Energy in India
Q. What is renewable energy curtailment?
Renewable energy curtailment happens when a grid operator reduces electricity production from an available renewable source because the system cannot safely transmit, balance and absorb the available power.
Q. Why is renewable energy being wasted in India?
The main reasons include transmission bottlenecks, delayed grid projects, local congestion, changing electricity demand, system-security requirements and insufficient storage.
Q. Can batteries stop renewable energy curtailment?
Batteries can significantly reduce curtailment by storing surplus electricity and releasing it later. They cannot replace the need for transmission expansion, but they can provide flexibility where grid congestion or timing mismatches are temporary.
Q. Will India still need coal?
For the foreseeable future, coal remains a major source of electricity generation because it provides firm and dispatchable power. The IEA reported that coal accounted for 71% of India’s electricity generation in 2025, despite rapid growth in renewables.
Q. What is India’s 2030 renewable energy target?
India aims to have 500 GW of installed non-fossil electricity capacity by 2030. Achieving that target will require generation growth to be matched by transmission, storage and other forms of grid flexibility.
Samarjit Kaur is a journalist and communications professional covering technology & emerging digital trends. With a focus on clarity and context, she reports on developments shaping industries and governance. When not reporting, she chooses to plug-in and relax on her playlists and plan her next bucket-list trips!
