The Evidence on India's Coal Expansion: Why Production is Growing Alongside Renewables

India's power grid is currently navigating one of the most complex energy transitions in the world, characterized by a striking divergence between installed capacity and actual electricity generation. In a significant milestone for the developing nation, India recently crossed the threshold of having more than half of its installed power capacity derived from non-fossil sources, achieving this goal five years ahead of its 2030 target. However, this rapid expansion of renewable infrastructure is occurring alongside a massive surge in domestic coal production. The Indian government has set an ambitious target to scale annual coal output to 1.5 billion tonnes by the end of the decade, a move that appears to contradict global decarbonization efforts. This dual-track approach highlights a fundamental reality of managing a rapidly growing economy: adding renewable capacity does not immediately eliminate the structural need for fossil fuels.[1][2]

The core of this paradox lies in the operational differences between variable renewable energy and dispatchable thermal power. As of early 2026, India's non-fossil installed capacity reached 263.19 gigawatts, officially surpassing its coal and lignite capacity of 227.83 gigawatts. Despite this capacity advantage, coal continues to account for roughly 75 percent of the country's actual electricity generation. This discrepancy underscores the dispatchability premium in a fast-growing grid. Solar and wind energy are inherently intermittent, dependent on weather conditions and time of day, whereas coal plants provide a continuous, reliable baseload. Consequently, a single gigawatt of installed thermal capacity currently yields significantly more actual power over a 24-hour period than an equivalent renewable installation, anchoring the stability of the national grid.[1][4]

A primary driver of this continued reliance on thermal generation is the increasing frequency and severity of extreme weather events. India has faced prolonged heatwaves in recent years, which have fundamentally altered the country's electricity consumption patterns. In 2024 and 2025, peak electricity demand surged to roughly 250 gigawatts, driven largely by the massive deployment of air conditioning and cooling systems. Empirical estimates suggest that each one-degree Celsius increase above normal temperatures can add approximately six to eight gigawatts to the peak demand load. This climate-fueled surge in energy requirements places unprecedented strain on the grid, forcing system operators to maximize output from all available generation sources, including older and less efficient coal plants, to prevent widespread outages.[5][6]

The structural vulnerability of India's grid is exacerbated by a temporal mismatch between renewable generation and peak demand. Solar power provides substantial support during the daytime, significantly offsetting the need for fossil fuels when the sun is shining. However, solar output drops sharply after sunset, creating a steep evening ramp exactly when residential cooling demand reaches its zenith. This phenomenon, often referred to as the "duck curve," requires conventional generation sources to rapidly increase their output to bridge the gap. Without sufficient grid-scale battery storage or pumped hydropower to shift daytime solar generation into the evening hours, the system remains heavily dependent on the dispatchability of coal to maintain voltage stability and meet the evening peak.[5][6]

In response to these operational realities, the role of coal-based generation in India is undergoing a fundamental shift. Rather than serving exclusively as a steady, uninterrupted baseload provider, the thermal fleet is increasingly being utilized as a flexible balancing resource. The Indian government has recognized this necessity, notifying regulations that require coal plants to improve their ramping capabilities and operate at lower minimum technical loads. This flexibilization allows thermal units to dial down their output during peak solar hours and rapidly ramp up as the sun sets. By acting as a system shock absorber, the coal fleet accommodates the integration of larger volumes of variable renewable energy, albeit at the cost of reduced overall plant efficiency and increased wear and tear on the thermal infrastructure.[3][4]

While the headline tariffs for utility-scale solar and wind projects in India have fallen to some of the lowest levels globally, the broader economics of grid integration present a more complex picture. Renewable energy is highly cost-competitive on a standalone basis, but the effective system cost narrows significantly when factoring in the necessary investments in transmission upgrades, grid balancing, and energy storage. Coal plants, particularly those located near domestic mines, continue to provide predictable power at tariffs that remain attractive to state distribution companies. Until battery storage technologies achieve greater economies of scale and domestic manufacturing capacity expands, thermal power remains a pragmatic economic hedge against demand volatility and the inherent intermittency of renewable sources.[1][3]

Driven by these reliability and economic imperatives, India is actively expanding its thermal power pipeline alongside its renewable ambitions. The federal ministry projects that coal capacity will rise toward 307 gigawatts by the 2034-35 fiscal year, with plans to add at least 97 gigawatts of new thermal infrastructure. This expansion is not officially framed as a reversal of the country's climate commitments, but rather as a necessary parallel investment to ensure energy security during the transition decade. Policymakers argue that scaling clean energy quickly is critical, but it must be matched by sufficient dispatchable capacity to reliably and affordably meet an electricity demand curve that is growing by roughly seven percent annually.[1][6]

However, this dual-track strategy carries substantial environmental implications that extend beyond standard carbon dioxide emissions. The ambitious push to reach 1.5 billion tonnes of annual coal production includes a specific government mandate to triple output from underground mines by the end of the decade. While underground mining avoids some of the severe surface-level ecological disruption and land-use conflicts associated with sprawling opencast operations, it introduces a distinct and potent climate challenge. Deep coal seams contain significant pockets of trapped gas, which are inevitably released into the atmosphere during the extraction process.[2]

These fugitive emissions represent a growing concern for global climate models. Annual methane emissions from Indian coal mining are projected to more than double from 2019 levels by the end of the decade, potentially exceeding 1.6 million tonnes. Given that methane possesses a short-term atmospheric warming impact over 80 times greater than that of carbon dioxide, the rapid expansion of underground operations threatens to offset a measurable portion of the climate benefits gained from the concurrent rollout of renewable energy. Environmental analysts warn that without stringent monitoring and capture technologies, this localized production boom could complicate international emissions reduction efforts.[2][3]

Despite the ongoing reliance on thermal generation, India's commitment to fundamentally transforming its energy architecture remains robust. The national target to deploy 500 gigawatts of renewable energy capacity by 2030 continues to serve as a powerful, market-shaping signal to global investors and developers. This ambition is driving massive capital flows into utility-scale solar parks, onshore wind farms, and emerging clean technologies like green hydrogen. By consistently meeting and exceeding interim capacity milestones, the government is demonstrating that its long-term policy trajectory remains firmly pointed toward a non-fossil future, even as short-term operational realities necessitate continued fossil fuel use.[1][3]

To bridge the gap between intermittent generation and reliable supply, the transition is also prompting critical regulatory and infrastructure reforms. Policymakers are increasingly mandating the inclusion of battery storage components in new solar and wind capacity tenders, shifting the market toward hybrid "round-the-clock" power contracts. Furthermore, the government is providing viability gap funding to accelerate the deployment of grid-scale storage solutions and pumped hydropower projects. These targeted infrastructure investments are systematically laying the technical groundwork for a future grid where renewable sources, backed by massive storage capacity, can eventually assume the baseload responsibilities currently shouldered by coal.[1][4]

Ultimately, India's power transition is best understood not as a linear pathway toward immediate decarbonization, but as a highly calibrated balancing act. The country is not choosing between coal and renewables; it is scaling both in parallel to accommodate an unprecedented surge in aggregate energy demand. Coal remains the system's vital shock absorber, providing the dispatchability required to navigate extreme weather and grid intermittency. Meanwhile, renewables represent the undeniable growth engine of the future. The speed at which this balance permanently tilts away from fossil fuels will largely depend on the pace of advancements in energy storage and the expansion of national transmission networks.[1][3][5]