West Bengal's next industrial leap depends on one foundational choice: reliable, clean, round-the-clock power
As a new government takes charge in West Bengal, the state enters a decisive phase of its development journey. The mandate must now translate into a credible growth strategy: reviving manufacturing, expanding infrastructure, attracting investment, and positioning Bengal within India’s next economic cycle.
The success of that ambition will depend on one foundational question: reliable energy.
West Bengal’s electricity demand is projected to grow by nearly 5 percent annually over the next two decades. Its industrial expansion, infrastructure build-out, and emerging digital economy are expected to push captive industrial power demand up by nearly 19 percent annually between 2021–22 and 2031–32. How Bengal meets this demand will shape not only its competitiveness and investment attractiveness but also its place in India’s future growth story.
This challenge has become sharper amid rising geopolitical uncertainty. Global fuel price volatility, supply chain disruptions, and growing energy insecurity are exposing the risks of overreliance on imported fossil fuels. For a state that historically powered India’s industrial economy through coal, the next phase of growth cannot remain tied to ageing thermal systems, rising pollution burdens, and mounting fiscal stress.
Renewable energy will inevitably sit at the centre of this transition. Yet Bengal’s renewable potential has long been underestimated. Recent assessments estimate over 19,000 MW of ground-mounted solar potential, 3,567 MW of floating solar across reservoirs, nearly 23,000 MW of wind potential at higher hub heights, and close to 2,900 MW of biomass potential. Mining wastelands, industrial land, reservoirs, and agricultural residues together offer the foundations of a new energy economy.
The real question, therefore, is whether Bengal can convert its energy transition into a new engine of economic growth.
Renewable energy round-the-clock (RE-RTC) offers precisely such a pathway. Unlike standalone solar or wind, RE-RTC combines renewable generation with storage to provide reliable electricity throughout the day, including during peak demand. For a state seeking industrial revival, this distinction is critical. Manufacturing, logistics, Micro, Small and Medium Enterprises (MSMEs), cold chains, data centres, and urban infrastructure cannot run on intermittent power.
The first dividend of this shift is unlocking industrial competitiveness.
Industrial clusters across Haldia, Durgapur, Asansol, and the Kolkata Metropolitan Region require uninterrupted electricity for steel, chemicals, freight transport, warehousing, and urban infrastructure. Yet Bengal’s power system remains vulnerable to coal-related disruptions — from fuel shortages and railway bottlenecks to imported coal price volatility and water stress.
While expanding renewable generation is essential, standalone renewables alone cannot guarantee reliability because solar and wind output fluctuates throughout the day. RE-RTC changes this equation by combining renewables with storage and balancing systems, allowing clean energy to function as dependable, firm power.
Renewable-plus-storage systems can also be deployed far faster than conventional coal capacity. While new coal plants often take six to seven years to become operational, RE-plus-storage projects can typically be implemented within two to three years. This allows states to respond more rapidly to rising electricity demand without locking themselves into expensive thermal infrastructure for decades.
Global supply chains are also increasingly prioritising low-carbon manufacturing, as carbon intensity becomes a key factor in investment and trade decisions.
Global supply chains are also increasingly prioritising low-carbon manufacturing, as carbon intensity becomes a key factor in investment and trade decisions. States capable of providing reliable green power will gain a structural advantage in attracting industry. Bengal’s industrial geography places it in a strong position to benefit from this shift. Haldia Port alone handles over 45 million tonnes of cargo annually and anchors eastern India’s petrochemical and logistics economy. Combined with the Kolkata–Haldia industrial belt, Durgapur’s steel ecosystem, and emerging freight corridors, Bengal already possesses one of eastern India’s largest industrial demand centres.
The second dividend is strengthening economic resilience.
Coal-heavy power systems are becoming progressively more expensive to sustain, placing mounting pressure on DISCOM finances and state budgets. West Bengal itself remains tied to long-term thermal expansion. In 2025, WBSEDCL signed a 25-year power purchase agreement for a new 1,600 MW coal-based thermal plant at Salboni, with an additional 1,600 MW agreement subsequently announced, locking the state into large coal-based capacity for decades. Long-term coal PPAs expose utilities to high fixed costs, fuel price volatility, and reduced operational flexibility, precisely at a time when energy systems globally are moving towards cheaper and more flexible renewable-plus-storage models.
Coal-heavy power systems are becoming progressively more expensive to sustain, placing mounting pressure on DISCOM finances and state budgets.
Renewable-plus-storage systems offer far greater long-term price certainty while reducing exposure to fuel volatility. As storage costs continue to decline, round-the-clock renewable contracts are becoming increasingly competitive. Battery storage costs have fallen by 90 percent globally over the past decade, while recent bids in India have yielded storage costs as low as INR 2.1–2.8 per unit.
At present, West Bengal procures much of its renewable power from outside the state, treating clean energy largely as a compliance requirement rather than an economic opportunity. Instead, Bengal must begin building its own renewable pipeline: floating solar on reservoirs, solar parks on degraded mining land, biomass-linked projects in agricultural districts, rooftop solar across urban centres and MSMEs, alongside pumped-storage systems to stabilise supply.
Such a strategy could unlock significant climate and development finance. International investors and climate funds are increasingly looking for large-scale, bankable clean-energy projects with predictable returns. States that move early are already attracting capital at scale. Bengal risks missing this investment cycle if it fails to build a credible clean-energy pipeline.
The third dividend is advancing development outcomes.
Bengal’s energy future cannot be separated from the lived realities of Kolkata, Asansol, Durgapur and Raniganj, where pollution, heat stress, and deteriorating air quality increasingly affect productivity, healthcare burdens and quality of life.
The state’s next growth phase will inevitably be urban and industrial. RE-RTC systems would allow renewables to replace coal generation across the day rather than intermittently. This creates a sustained reduction in pollution and emissions, reduces healthcare burdens, improves workforce productivity, and strengthens the competitiveness of cities such as Kolkata and Durgapur.
West Bengal now has the opportunity to write that story — not by walking away from its coal economy, but by transforming it into the foundation of its next industrial revival.
But the transition must also remain politically credible. Coal districts require a serious just-transition strategy that protects livelihoods, reskills workers, repurposes industrial land, and channels new investment into the very regions that powered Bengal’s earlier industrial economy.
India’s energy transition will not succeed if it remains concentrated in a handful of renewable-rich states. It will succeed when coal-dependent states such as West Bengal discover a new development proposition in clean power.
West Bengal now has the opportunity to write that story — not by walking away from its coal economy, but by transforming it into the foundation of its next industrial revival.
Aparna Roy is a Fellow and Lead, Climate Change and Energy with the Centre for New Economic Diplomacy (CNED) at the Observer Research Foundation.
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Aparna Roy is a Fellow and Lead Climate Change and Energy at the Centre for New Economic Diplomacy (CNED). Aparna's primary research focus is on ...
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