For decades, India’s energy challenge can be summarized as: building more capacity. More coal, more transmission lines, more renewable energy. Solar, in particular, became the poster child for the country’s clean energy ambitions.Now success has created a new problem.In India’s vast solar parks, electricity is being generated faster than the grid can absorb it. The panels continue to receive abundant sunlight, but not every electron finds a home.This is an irony that few could have predicted a decade ago.India’s solar revolution is no longer primarily hampered by a lack of production capacity. It is increasingly constrained by its ability to transfer, store and use the electricity it produces.That paradox, producing too much clean power at the wrong time, could define the next phase of India’s energy transition.
From solar laggard to powerhouse
India’s solar power has been one of the country’s most notable infrastructure transformations.India experiences 250–300 sunny days per year in most parts of the country, with 4–7 kWh of solar insolation per square meter per day. A recent working paper of the Prime Minister’s Economic Advisory Council (EAC-PM) said India’s installed solar capacity is expected to grow from just 3 GW in 2014 to about 157 GW by May 2026.
According to the Press Information Bureau (PIB), solar energy has emerged as the largest contributor to India’s renewable energy portfolio, surpassing other clean energy sources in installed capacity.According to the Renewable Energy Statistics 2026, the country now ranks third globally in installed solar capacity, showing how rapidly India has increased deployment.This growth has helped transform India’s broader power system.By October 2025, non-fossil fuel sources will contribute more than half of India’s installed power capacity, another milestone highlighted by the PIB.This expansion also underlines India’s Panchamrit commitments announced at COP26, which include achieving 500 GW of non-fossil power capacity by 2030 and ultimately reaching net-zero emissions by 2070.Yet the country’s biggest solar success has also exposed its weakest link.
Contradiction
The warning signs are becoming difficult to ignore.According to a written answer in Parliament by the Minister of State for Renewable Energy Shripad Yesso NaikIndia cut 8,133 gigawatt-hours (GWh) of solar power during the April-June period as the grid could not absorb all the renewable energy generated.
Curtailments rose from 2,417 GW in April to 3,235 GW in May, but fell slightly to 2,481 GW in June, according to government data reported by Reuters.The government blamed the restrictions on a mismatch between renewable energy projects coming online before grid security requirements and the transmission infrastructure needed to evacuate that power.In fact, India is generating clean electricity which cannot always be delivered to consumers.The problem is not limited to isolated projects. Government data also shows that about 21 GW of renewable energy capacity is currently connected through temporary transmission arrangements, while another 12 GW cannot feed the entire power into the grid due to transmission constraints.
Why could more solar power put a strain on the grid?
At first glance the situation appears to be the opposite.How can a country require more renewable energy while simultaneously asking it to reduce output from existing solar plants?The answer lies in how power systems work.
Solar energy production peaks at noon, when sunlight is at its strongest.However, electricity demand often reaches its highest point after sunset, just when solar energy production begins to fall.The result is a growing mismatch between when electricity is generated and when it is most needed.The EAC-PM Working Paper argues that India’s power challenge has fundamentally changed. “The active constraint on the grid has shifted from generation capacity to flexibility,” the report said.The paper describes India’s increasingly pronounced “duck curve”, a phenomenon seen in many high-renewable power systems, where solar power creates a deep trough in daytime demand from conventional power plants, followed by a sharp increase in the evening after the sun sets.Change has happened rapidly.According to the EAC-PM analysis, between May 2023 and May 2026, the evening net-load ramp nearly doubled, from about 36 GW to 74 GW, while the morning drawdown caused solar flood into the grid to nearly triple, from 18 GW to 53 GW.
who is running it
This surge is being driven by a combination of ambitious policy support and falling solar costs.PM Surya Ghar: The government’s flagship programs like the Free Electricity Scheme aim to install rooftop solar systems in one crore homes. According to PIB, by December 2025, 23.9 lakh households had installed rooftop systems with about 7 GW capacity, while over Rs 13,464 crore had been released as subsidy.Meanwhile, the Production Linked Incentive (PLI) scheme for high-efficiency solar PV modules, with a total outlay of Rs 24,000 crore, seeks to build domestic manufacturing capacity and reduce import dependence.India has also accelerated utility-scale solar parks and expanded renewable procurement through competitive bidding.
As a result, there has been an unprecedented increase in capacity. According to NITI Aayog’s India Climate and Energy Dashboard, renewable energy capacity grew from 58 GW in 2020-21 to about 283 GW by May 2026, of which solar power alone contributed about 157 GW.
The grid is changing rapidly
The demand for electricity itself is increasing at a remarkable pace.According to the Central Electricity Authority (CEA), peak demand increased from 190 GW in 2020-21 to about 250 GW in 2024-25, while annual power requirement increased from 1,276 billion units to 1,694 billion units over the same period.The trend continues.According to EAC-PM, on May 21, 2026, India’s grid recorded its highest ever demand touching 270.8 GW.Yet on the same day another shocking reality came to light.Electricity traded at only Rs 1.56 per unit at 1 pm on the Indian Energy Exchange after solar power flooded the grid. By 6.30 pm, after sunset, prices had risen to the market limit of Rs 10 per unit.There is no shortage of electricity during day time in India. After dark it lacks flexibility.Another hurdle lies in India’s domestic manufacturing ecosystem. Even though the government is emphasizing self-reliance in solar equipment, manufacturers are grappling with the shortage of locally manufactured solar cells.According to Reuters, about one-third of India’s small and medium-sized solar module makers have halted production, while others have cut operating days due to waiting periods of up to eight months for domestic cells. India still depends on China for about 95% of its solar cell imports, with supply shortages threatening to slow capacity expansion and drive up production costs, highlighting the gap between policy ambition and manufacturing readiness.
Will the rise continue?
almost certainly.
India’s clean energy targets remain one of the most ambitious in the world, and the pace of policy shows no signs of slowing down. However, the challenge has shifted from building generation assets to building a power system capable of handling them.Leveling even half of typical summer evening demand would require about 130 GWh of battery discharge, far more than India’s current storage capacity.While pumped hydro projects have progressed steadily, battery deployment has lagged behind estimates. Recent additions have increased battery energy storage capacity to approximately 2.7 GWh, but a large gap remains.
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Recognizing this, the proposed amendments to the Electricity Act and consumer rules aim to formally integrate energy storage into India’s electricity system, deepen electricity markets, strengthen non-fossil obligations and accelerate day-to-day tariffs, all with the aim of improving grid resilience.
next chapter
India’s solar journey is in many ways a victim of its own success.The next decade of India’s energy transformation will be defined less by the number of panels installed than by the intelligence of the grid behind them. Transmission lines, batteries, storage technologies, flexible markets and better demand management will determine whether India’s abundant sunshine will translate into reliable clean energy.
