Keeping the Lights On, Cutting the Carbon

On a sweltering May afternoon in Hyderabad, as temperatures hover near 45°C, the city slips into a familiar rhythm. Air conditioners drone across high-rises in Gachibowli, data centres hum without pause, and distribution transformers strain under the surge. Behind this seamless urban choreography, a coal-fired plant hundreds of kilometres away quietly ramps up output to hold the grid steady. In that invisible adjustment lies the paradox of India’s energy story: even as solar parks expand across Telangana’s landscape, the system still leans on coal to survive the heat.

India’s energy challenge is no longer about merely keeping the lights on. It is about doing so while steadily cutting carbon emissions. What appears to be a routine supply–demand problem has evolved into a complex balancing act, one where economic growth, energy security, and climate responsibility must move together, often in tension.

Electricity demand is rising not as a temporary spike but as a structural shift. Annual generation has crossed 1,800 billion units, while peak demand has surged beyond 250 GW, with projections nearing 270 GW during extreme summer conditions. These are not anomalies. They reflect deeper transformations: expanding urbanisation, rising household electrification, a manufacturing push, and intensifying heatwaves driving unprecedented cooling demand. For a fast-growing urban hub like Hyderabad with its IT corridors, pharmaceutical industries, and rapidly expanding suburbs energy is not a convenience; it is the backbone of economic life.

Within this landscape, coal’s continued dominance demands a more careful reading. That nearly 70% of India’s electricity remains coal-based is often framed as a policy failure. In reality, it reflects systemic constraints. Coal continues to provide baseload, round-the-clock power in a grid where variability carries immediate economic costs. As the Central Electricity Authority has consistently underlined, grid stability cannot yet be assured without conventional sources. Moreover, coal’s domestic availability offers insulation from volatile global markets an advantage that gained renewed relevance after the Russia-Ukraine war exposed the fragility of international energy supply chains.

At the same time, India’s renewable energy expansion has been both rapid and globally significant. Non-fossil sources now account for over half of installed capacity, with total renewable capacity exceeding 220 GW. Telangana itself has emerged as a key player in solar deployment, leveraging its geography and policy push. Solar tariffs have fallen sharply, making clean energy increasingly competitive. Yet, beneath this success lies a critical asymmetry: capacity does not seamlessly translate into generation. Renewables contribute roughly 28–30% of electricity output, with solar and wind together forming an even smaller share.

This gap is structural. Renewable energy is inherently intermittent, while India’s demand profile requires continuity. In the absence of large-scale, cost-effective storage, every additional megawatt of solar or wind paradoxically reinforces dependence on coal to stabilise the grid. The system, therefore, operates in a dual mode expanding clean energy rapidly, even as it relies on fossil fuels to sustain that expansion.

Overlaying this technical constraint is the question of energy security. India imports over 85% of its crude oil, while natural gas remains exposed to global price volatility. External shocks—from geopolitical conflicts to supply disruptions have repeatedly demonstrated how vulnerable energy-importing economies can be. In contrast, coal offers a domestically anchored alternative. Its continued role is therefore not merely economic, but strategic. As assessments by the International Energy Agency suggest, transitions in developing economies are shaped as much by security concerns as by climate ambition.

It is against this backdrop that India’s climate commitments must be understood. The country has pledged to achieve 500 GW of non-fossil capacity by 2030, reduce emissions intensity by 45% from 2005 levels, and reach net zero by 2070. These are ambitious targets. Yet they coexist with a developmental reality: per capita electricity consumption remains below global averages, industrialisation is incomplete, and energy demand is set to grow for decades. Decarbonisation, therefore, cannot come at the cost of development it must proceed alongside it.

The pathway forward lies not in resolving this tension, but in managing it with precision. Storage will be the decisive variable the hinge on which the transition will turn. Without it, renewable expansion risks becoming a story of untapped potential. Planned investments in battery storage and pumped hydro are promising, but their scale and execution will be critical.

Equally important is grid modernisation. A flexible, digitally managed grid capable of balancing variable supply with dynamic demand will be indispensable. Coal, meanwhile, is unlikely to disappear in the medium term. The focus must shift towards improving plant efficiency, reducing emissions intensity, and managing a gradual, calibrated decline rather than an abrupt exit.

Diversification beyond solar and wind will also be essential. Nuclear energy, green hydrogen, and hybrid systems can provide the stability that intermittent sources cannot. The transition, in this sense, must be technologically diverse rather than ideologically narrow.

India’s energy challenge is often framed as a binary choice between coal and clean energy. Such a framing misses the deeper reality. The country is attempting a far more demanding task: a simultaneous expansion and transition at an unprecedented scale. Coal persists because the present demands reliability. Renewables expand because the future demands sustainability.

The task, therefore, is not to choose between the two, but to sequence the transition intelligently ensuring that the effort to cut carbon does not undermine the imperative to keep the lights on. In navigating this delicate balance, India is not merely shaping its own trajectory. It is also offering a template for cities like Hyderabad and for the wider developing world, where growth and responsibility must coexist, not compete.