Article 3: Renewable energy transition in India
Why in News: As India enters the peak summer season, the country’s power sector is witnessing a growing mismatch between high daytime solar generation and rising night-time electricity demand. This widening gap is creating fresh concerns for grid managers and policymakers regarding energy security, grid stability, and reliability of supply.
Key Details
- India recorded peak electricity demand during daytime hours on several occasions in April 2026 due to intense heatwave conditions. This daytime demand was largely supported by rising solar power generation, especially during afternoon hours when sunlight availability was maximum.
- Despite adequate daytime supply, night-time electricity shortages were reported on most days during the same period. The deficit touched nearly 5.4 GW, which is substantial enough to supply electricity to millions of households.
- Coal-based thermal plants, which remain India’s primary source of baseload electricity, faced several forced outages. These outages reduced reliable power availability after sunset, precisely when solar generation sharply declined.
- Experts believe that India’s rapid renewable energy expansion is not being matched by sufficient growth in battery storage systems and dispatchable power sources. This imbalance is emerging as one of the biggest structural challenges in India’s clean energy transition.
India’s Electricity Mix and Baseload Power
- India’s electricity sector depends on a combination of thermal, hydro, renewable, and nuclear energy sources. Among these, coal-based thermal power still forms the backbone of India’s electricity supply due to its ability to provide continuous power.
- Baseload power refers to the minimum level of electricity demand that exists throughout the day and night. Such demand requires stable and uninterrupted electricity generation from sources like coal, hydro, and nuclear plants.
- Renewable energy sources such as solar and wind are expanding rapidly under India’s climate commitments. However, these sources are intermittent in nature because they depend on weather conditions and sunlight availability.
- Grid operators must constantly maintain a balance between electricity supply and demand in real time. Even small imbalances can create frequency fluctuations and threaten overall grid stability.
Solar Energy Growth and Emerging Power Challenges
- India has emerged as one of the world’s fastest-growing solar energy markets under initiatives like the National Solar Mission. This expansion has significantly improved electricity availability during daytime hours.
- Solar power generation reaches its highest level during afternoon hours when cooling demand from air conditioners also peaks. This alignment has helped reduce pressure on thermal power plants during daytime.
- However, electricity demand does not fall proportionately after sunset, while solar generation almost disappears. This creates a sharp evening demand-supply gap, commonly referred to as the “duck curve” challenge in energy economics.
- Rising adoption of electric vehicles (EVs), electric cooking appliances, and cooling systems is increasing post-sunset electricity consumption. This trend is expected to intensify further as India moves towards greater electrification of the economy.
Night-Time Power Deficit and Grid Stress
- The biggest concern for grid managers today is not daytime supply, but the growing stress during evening and night-time hours. This is because renewable energy alone is currently unable to meet rising post-sunset electricity demand.
- India’s dependence on thermal power increases sharply during night hours when solar generation falls drastically. Any outage in coal or nuclear plants during this period immediately affects grid reliability.
- Forced outages occur due to equipment failure, maintenance issues, or fuel supply constraints. In April 2026, nearly 23 GW of thermal and nuclear capacity remained unavailable during a period of high demand.
- Heatwaves are worsening the problem because electricity demand is now remaining high throughout the entire day and night. This leaves very limited recovery time for the power system and increases operational pressure on utilities.
Battery Energy Storage Systems (BESS) and Their Importance
- Battery Energy Storage Systems (BESS) store surplus electricity generated during daytime for later use during evening demand peaks. They are increasingly considered essential for managing large-scale renewable energy integration.
- India’s installed battery storage capacity remains extremely limited compared to its renewable energy ambitions. This gap is becoming a major obstacle in achieving reliable clean energy transition.
- Storage systems can reduce dependence on coal-based peaking plants and improve flexibility of the electricity grid. They also help in maintaining stable frequency and reducing transmission congestion.
- The Government of India has introduced incentives for domestic battery manufacturing and energy storage projects. However, commercial deployment at scale is still in its early stages.
Role of Thermal and Nuclear Energy in Grid Stability
- Coal-based thermal plants continue to play a critical role in ensuring round-the-clock electricity availability. Unlike solar and wind power, thermal plants can generate electricity continuously irrespective of weather conditions.
- India’s nuclear energy sector provides a small but reliable source of low-carbon baseload electricity. However, nuclear capacity expansion remains slow due to high costs and long project timelines.
- Over the past few years, renewable energy additions have far outpaced thermal capacity expansion. This imbalance is creating concerns regarding the long-term reliability of electricity supply.
- Experts increasingly argue that India requires a balanced energy mix rather than excessive dependence on any single source. Energy security and sustainability must progress together for stable economic growth.
Heatwaves, Climate Change and Rising Power Demand
- India is witnessing more frequent and intense heatwaves due to climate change and rapid urbanisation. These heat conditions are significantly increasing electricity demand for cooling purposes.
- April 2026 recorded exceptionally high temperatures across several parts of the country. Many Indian cities featured among the hottest urban centres globally during this period.
- Sustained high temperatures mean that electricity demand remains elevated even during night-time hours. This marks a major shift from traditional demand patterns where consumption reduced after sunset.
- Climate-induced stress on electricity infrastructure is emerging as a major governance and development challenge. It directly affects households, industries, agriculture, healthcare systems, and urban productivity.
Grid Management and Institutional Mechanisms
- Grid Controller of India is responsible for maintaining stability and reliability of the national electricity grid. It manages electricity flow and coordinates balancing operations across different regions.
- The Central Electricity Authority monitors power generation, infrastructure planning, and demand trends. It also prepares long-term strategies for strengthening India’s electricity system.
- India’s “One Nation, One Grid” framework has improved inter-state electricity transfer capabilities. This integrated system enables better sharing of electricity between surplus and deficit regions.
- Smart grids, flexible generation technologies, and advanced forecasting systems are becoming increasingly important. These technologies are necessary for managing renewable variability and reducing blackout risks.
India’s Energy Transition and Renewable Targets
- India has committed to achieving 500 GW of non-fossil fuel electricity capacity by 2030 under its climate goals. This target is central to India’s energy transition and global climate commitments.
- Rapid renewable energy growth is important for reducing dependence on imported fossil fuels. It also helps India move towards cleaner and more sustainable economic growth.
- However, clean energy transition must also ensure affordability, reliability, and uninterrupted supply. A transition that compromises grid stability can negatively impact industries and economic productivity.
- The future of India’s energy sector will depend on how effectively it balances sustainability with energy security. This requires parallel investments in storage systems, transmission networks, and flexible generation capacity.
Way Forward
- India must accelerate investments in battery storage systems, pumped hydro projects, and smart grid technologies. These are essential for addressing the growing mismatch between daytime and night-time electricity supply.
- Expansion of transmission infrastructure and grid modernisation should be treated as a national priority. A stronger grid can improve renewable integration and reduce regional supply imbalances.
- A balanced energy mix involving renewables, hydro, thermal, and nuclear power remains crucial. This will ensure both sustainability and reliable round-the-clock electricity availability.
- Long-term energy planning should integrate climate projections, urbanisation trends, and future demand growth. This will help India build a resilient, efficient, and future-ready power system.
Conclusion
India’s widening night-time power deficit highlights the growing complexity of managing a rapidly transforming energy system. While renewable energy has strengthened daytime electricity availability, the absence of adequate storage and reliable baseload capacity is increasing pressure on the grid after sunset. Ensuring a balanced and resilient energy transition will be critical for maintaining both energy security and sustainable economic growth in the coming decades.
EXPECTED QUESTIONS FOR UPSC CSE
Prelims MCQ
Q. With reference to India’s electricity sector, consider the following statements:
- Solar power generation in India generally peaks during daytime hours and declines sharply after sunset.
- Battery Energy Storage Systems help integrate renewable energy into the electricity grid.
- Baseload electricity demand can be reliably met only through renewable energy sources.
How many of the above statements are correct?
(a) Only one
(b) Only two
(c) All three
(d) None
Answer: (b)
Descriptive Question
Q. “India’s rapid renewable energy expansion has improved daytime electricity availability, but rising night-time power deficits are emerging as a serious challenge for grid stability.” (250 words, 15 marks)