India’s green transition still runs on coal 

Why in News?

Rising global energy prices following recent tensions in West Asia have once again highlighted India’s continuing exposure to external energy shocks. Despite substantial expansion in renewable energy capacity, India continues to rely heavily on coal for actual electricity generation, raising important questions about the pace and nature of India’s energy transition.

UPSC Relevance

Prelims

• Economic & Infrastructure Development: Trends in installed power capacity vs. actual generation mix; market mechanisms like Green Energy Open Access and Real-Time Markets (RTM).
• Geography & International Relations: Strategic choke points (Strait of Hormuz, Bab-el-Mandeb); transit routes of India’s crude and Liquefied Natural Gas (LNG) imports from Saudi Arabia and Qatar.
• Science & Technology: Battery Energy Storage Systems (BESS), Pumped Storage Hydro Power (PSP), grid synchronization, and the chemistry of green hydrogen production.

Mains

• GS Paper II (International Relations): Geopolitics of West Asia, energy diplomacy, and the impact of external commodity cycles on India’s domestic inflation and fiscal deficit.
• GS Paper III (Infrastructure, Environment, and Economic Development): Energy security, structural challenges of the power sector, climate change commitments (Panchamrit targets under COP26), and transitioning from capacity creation to system transformation.

Background and Context

Over the past two decades, India’s energy landscape has undergone a massive shift in terms of installed infrastructure. In March 2005, renewable energy represented a negligible 0.72% of the country’s total installed power capacity, while coal held a dominant 58.7% share. By March 2026, policy interventions, fiscal incentives, and falling solar photovoltaic (PV) tariff costs reshaped these metrics. Renewables climbed to 42.4%, while coal’s share of installed capacity fell to 42.2%.

However, this transition remains incomplete on the generation front. Since 2018, India has added almost no new gas-based or alternative fossil fuel capacity and retired very few aging, inefficient coal plants. Because power systems depend on immediate, real-time generation rather than theoretical headline capacity, coal has stayed on as the primary balancing and baseload provider. As a result, domestic power tariffs remain tied to international Brent crude and global coal price cycles.

The Capacity-Generation Dichotomy

The core structural challenge of India’s energy sector is the wide gap between peak capacity and actual power generation. This divergence stems from the fundamental differences in Plant Load Factors (PLF) or capacity utilization rates across different energy sources:

• Intermittency of Clean Energy: Solar and wind power depend heavily on seasonal and diurnal weather patterns. Solar plants generate power for 5 to 6 hours a day, and wind generation peaks during specific monsoon months. Their average PLF ranges between 20% and 25%.
• Baseload Dominance of Coal: Coal-fired thermal power plants operate at PLFs ranging from 65% to 85%. They provide continuous, uninterrupted power that matches the country’s steady baseline demand, which makes up for the low utilization rates of renewable sources.

Grid Instability and the Balancing Crisis

As more intermittent renewable energy enters the national grid, managing grid stability becomes increasingly complex.

• The Duck Curve Phenomenon: Rapidly adding solar power creates a sharp drop in net demand during midday when solar generation peaks, followed by a steep climb in evening hours when solar output drops just as residential demand peaks.
• Thermal Ramping Constraints: Traditional Indian coal plants are designed for steady baseload operations. Forcing them to rapidly ramp generation up or down to balance fluctuating solar and wind inputs causes severe mechanical wear, lowers operational efficiency, and increases greenhouse gas emissions per unit of power generated.

Macroeconomic Vulnerabilities and External Shocks

Because coal continues to set the marginal cost of electricity production in India, the domestic economy remains exposed to global geopolitical disruptions:

• Imported Inflation and Fiscal Pressures: Spikes in international crude oil prices directly raise transportation and industrial input costs. This drives up global coal and gas indexes, leading to higher domestic electricity tariffs, broader retail inflation, and increased fiscal strains.
• The Strait of Hormuz Choke Point: Relying on this single marine corridor for a large portion of crude and Qatari LNG imports means any conflict in West Asia poses an immediate threat to India’s energy security.

Dimensions of the Energy Transition

1. Geopolitical & Strategic Dimensions

• Strategic Vulnerability Comparison: Unlike India, China has insulated its power grid from oil and gas fluctuations; oil and gas account for only 4% of its electricity mix, and over half of its new vehicle sales are electric or hybrid models. Meanwhile, European nations like Spain have used targeted regulatory models to break the link between volatile natural gas prices and electricity tariffs.
• Energy Diplomacy: India’s vulnerability highlights the need to diversify import routes and build stronger diplomatic and energy partnerships with Central Asian, African, and Latin American producers.

2. Economic & Governance Dimensions

• Financial Health of DISCOMs: Power Distribution Companies (DISCOMs) face a financial crunch due to high long-term Power Purchase Agreements (PPAs) signed with old thermal plants, coupled with the rising costs of integrating renewable energy.
• Fossil-Fuel Dependent State Revenues: Several major state governments (such as Jharkhand, Odisha, and Chhattisgarh) rely heavily on coal royalties, mining cesses, and railway freight revenues from coal transport to fund their public welfare budgets.

3. Environmental & Constitutional Dimensions

• Article 48A & COP26 Commitments: India is constitutionally committed to environmental protection and has set an ambitious target to achieve 500 GW of non-fossil fuel installed capacity by 2030 and reach Net-Zero emissions by 2070. Meeting these goals requires transforming the underlying energy system, not just adding capacity.

Relevant Committees, Frameworks, and Schemes

• Kirit Parikh Committee Recommendations: Emphasized pricing reforms in domestic gas production and regular adjustments to energy tariffs to shield the economy from sudden external price shocks.
• National Programme on Advanced Chemistry Cell (ACC) Battery Storage: A Production Linked Incentive (PLI) scheme designed to build domestic manufacturing capacity for utility-scale battery storage, which is critical for smoothing out renewable energy intermittency.
• National Green Hydrogen Mission: A strategic initiative aiming to replace fossil fuels in hard-to-abate heavy industries (such as steel, refineries, and fertilizers) with green hydrogen, helping to reduce long-term oil and gas import dependence.
• Green Energy Corridors (GEC): An infrastructure project focused on setting up intra-state and inter-state transmission lines to effectively integrate and distribute clean power from renewable-rich states across the national grid.

What are the Challenges and Concerns?

• High Costs of Battery Storage Technology: While utility-scale Battery Energy Storage Systems (BESS) offer a viable solution to renewable intermittency, the Levelized Cost of Storage (LCOS) remains high. This makes large-scale deployment economically difficult for financially strained DISCOMs without substantial state subsidies.
• Slow Development of Pumped Hydro Projects: Pumped Storage Hydropower (PSP) provides a reliable, long-duration energy storage alternative, but projects face long delays due to complex environmental clearances, land acquisition hurdles, and high initial capital costs.
• Underutilized Gas-Based Capacity: India has built considerable gas-based power infrastructure, which can ramp up and down quickly to balance the grid. However, low domestic gas production and high imported LNG prices have left much of this capacity underutilized.
• A Slow and Expensive Just Transition: Retiring old coal plants prematurely threatens the livelihoods of millions of workers employed in the domestic coal mining, logistics, and heavy industrial sectors, creating complex socio-economic challenges.

Way Forward

1. Transitioning to Comprehensive System Transformation

India must shift its policy focus from simply adding headline renewable capacity to executing a full transformation of its energy delivery systems. This requires upgrading transmission grids, investing heavily in smart grid technologies, and building out the infrastructure needed to handle large amounts of variable renewable power.

2. Accelerating Diversified Energy Storage Models

The government should introduce financial support measures, such as Viability Gap Funding (VGF), to accelerate the deployment of both BESS and Pumped Storage Hydro (PSP) networks. Setting a mandatory Energy Storage Obligation (ESO) for power utilities can help create a predictable, structured market for storage technologies.

3. Deepening Power Market Reforms

Expanding the Real-Time Market (RTM) and the Green Day-Ahead Market (G-DAM) will allow DISCOMs to dynamically adjust their power buying patterns. Introducing time-of-day tariff structures for retail consumers can incentivize shifting electricity use to peak solar generation hours, naturally smoothing out demand peaks.

4. Retrofitting the Existing Coal Fleet

Rather than shutting down thermal infrastructure immediately, India should invest in retrofitting modern coal plants to operate with greater flexibility. Lowering the technical minimum operational levels of these plants from 55% to 40% will allow them to step back during peak renewable generation hours and serve as an efficient balancing system for the grid.

Conclusion

India’s clean energy transition presents a complex dual reality: the country has achieved remarkable growth in building renewable energy infrastructure, yet it remains fundamentally reliant on fossil fuels for its day-to-day power generation. This structural imbalance leaves the domestic economy exposed to international energy crises and geopolitical shocks.

To build a truly resilient and independent energy system, India must move beyond celebrating installed capacity milestones and focus on the technical challenges of grid integration, affordable energy storage, and comprehensive power sector reforms. Until renewables can reliably supply baseline electricity generation, India’s green transition will continue to rely on coal to maintain grid stability.

Practice Questions

Prelims Question 1 (Inference based question)

Consider the following statements with reference to India’s energy transition:

I. India has substantially increased renewable energy capacity over the last two decades.
II. Coal continues to account for a large share of actual electricity generation.
III. Renewable energy sources such as solar and wind are inherently intermittent.

Which of the following relationships among the above statements is/are correct?

1. Statement II validates the argument that installed capacity alone cannot accurately indicate actual energy transition outcomes.
2. Statement III provides a structural explanation for the continued relevance of Statement II despite Statement I.
3. Statement I contradicts Statement II because increasing renewable capacity automatically reduces coal dependence.

(a) 1 only
(b) 1 and 2
(c) 2 and 3
(d) 1, 2 and 3

Correct Answer: (b)

Explanation: Statement II supports the view that capacity expansion alone does not ensure actual replacement of fossil fuels. Statement III explains why coal continues to remain important despite renewable expansion. Statement I does not automatically contradict Statement II.

Prelims Question 2

Assertion (A): Coal continues to play a major role in India’s electricity system.

Reason (R): Coal currently provides stable baseload power and balancing support to compensate for renewable intermittency.

(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.

Correct Answer: (a)

Explanation: Coal remains important because it currently performs a stabilising role by ensuring reliability and balancing fluctuations in renewable generation.

Mains Question

1. India’s energy transition has succeeded in expanding renewable capacity but has not substantially displaced coal in electricity generation. Examine.
2. Discuss the challenges associated with integrating renewable energy into India’s power system. Suggest measures for ensuring both sustainability and energy security.