Introduction
India is facing an unprecedented rise in electricity demand due to early and intense heatwave conditions in 2026. While the country has made remarkable progress in renewable energy, especially solar power, the recent power shortages during night-time hours have exposed critical structural weaknesses in the electricity sector. The crisis highlights the emerging challenge of balancing renewable energy expansion with grid stability, storage capacity, and reliable thermal power generation.
Record Surge in Electricity Demand
According to Grid India data, India recorded a historic peak power demand of 256 GW on 25 April 2026, with a shortfall of nearly 4.2 GW during late evening hours. A day earlier, demand touched 240 GW, accompanied by a larger deficit of 5.4 GW.
A notable feature of this crisis is that daytime demand was largely met without shortages. The real stress emerged after sunset, showing that India’s grid is currently capable of handling solar-hour demand but struggles once solar generation declines.
This unusual trend has also appeared much earlier than normal. Traditionally, India’s peak electricity demand occurs during June–July. However, severe heatwaves linked to climate change accelerated electricity consumption in April itself.
The “Solar Paradox” and the Duck Curve
India has nearly 150 GW of installed solar capacity, making solar energy a major pillar of the country’s clean energy transition. During the daytime, solar generation helps reduce dependence on fossil fuels and lowers electricity prices.
However, solar power generation drops sharply after sunset. At the same time, residential electricity demand rises due to increased use of air-conditioners, fans, and cooling appliances. This creates what is known as the “duck curve” effect, where electricity demand
remains high while solar supply rapidly falls.
As a result, the grid becomes heavily dependent on coal, hydro, gas, nuclear, and wind energy during non-solar hours. The recent shortages demonstrate that India currently lacks sufficient backup systems to bridge this gap effectively.
Failure of Thermal Power Plants
The immediate cause of the crisis was the sharp rise in outages at thermal power plants. While planned outages were expected at around 3 GW, forced and partial outages increased to nearly 26 GW.
Government estimates suggest that nearly 18 GW of coal-based capacity became unavailable unexpectedly, with an additional 3–4 GW operating below optimum levels. Consequently, thermal plants generated only 184–187 GW against an installed capacity of approximately 227 GW.
Extreme heat itself contributed significantly to these failures. High ambient temperatures increased thermal stress on boilers, turbines, and cooling systems, reducing plant efficiency during peak demand periods. This highlights the vulnerability of conventional power infrastructure to climate-induced weather extremes.
Impact on Electricity Markets
The crisis also resulted in severe volatility in electricity prices. Spot prices on the Indian Energy Exchange (IEX) touched the regulatory ceiling of ₹10 per kWh during night-time hours, while daytime prices fell to nearly ₹1.5 per kWh because of abundant solar supply.
Such extreme price fluctuations indicate a growing mismatch between daytime electricity surplus and night-time scarcity. Rising procurement costs may further worsen the financial condition of electricity distribution companies (DISCOMs), many of which are already burdened with debt and operational inefficiencies.
Key Challenges
- Lack of Energy Storage
India currently lacks large-scale battery storage systems capable of storing excess daytime solar energy for use during evening peak demand.
- Climate Change and Heatwaves
Increasing frequency and intensity of heatwaves are accelerating electricity demand, especially for cooling purposes.
- Thermal Power Vulnerability
Coal plants remain highly vulnerable to extreme weather conditions and operational stress.
- Grid Flexibility Constraints
Limited transmission capacity restricts efficient transfer of surplus power across regions.
- Financial Stress on DISCOMs
Price volatility and expensive short-term power purchases increase financial pressure on state utilities.
Way Forward
Battery Energy Storage Systems (BESS)
Large-scale battery storage is essential for storing surplus solar power generated during daytime and supplying it during evening hours.
Pumped Storage Hydropower
Expansion of pumped hydro storage can provide reliable large-scale backup support for renewable energy integration.
Demand-Side Management
Time-of-day tariffs and incentives can encourage industries and consumers to shift electricity usage away from peak evening hours.
Thermal Plant Modernisation
Improved cooling systems, predictive maintenance, and heat-resilient technologies are necessary to reduce forced outages.
Operationalisation of Gas-Based Plants
Idle gas-based power plants can provide flexible peaking power if supported through a stable gas pricing framework.
Strengthening Transmission Infrastructure
Expanding inter-regional transmission networks will improve grid flexibility and allow efficient movement of electricity across states.
Conclusion
India’s night-time energy crisis of 2026 is a warning that the country’s energy transition requires more than just expanding renewable capacity. While solar energy has transformed daytime electricity supply, the absence of adequate storage, grid flexibility, and reliable backup generation has created new vulnerabilities.
The crisis underlines the need for an integrated energy strategy combining renewable expansion with storage infrastructure, resilient thermal power, smarter demand management, and stronger transmission networks. Successfully addressing these challenges will be critical for ensuring India’s long-term energy security, economic stability, and climate resilience.