India’s energy transition hinges on $1.5 trillion grid investments and policy reforms

“India’s next decade is decisive,” said Joshua Ngu, Vice Chairman, Asia Pacific at Wood Mackenzie, as he outlined the scale and urgency of capital required for the country’s energy transition. Wood Mackenzie’s assessment, presented at India Energy Week 2026, estimates that roughly $145 billion a year will be necessary to preserve growth ambitions while pursuing net-zero objectives. The bulk of this financing, the consultancy argues, must go to renewable generation, grid modernisation and storage if India is to avoid locking in carbon-intensive infrastructure.

The power system sits at the centre of that challenge. Industry analysis shows that non-fossil capacity now outweighs fossil capacity on the system, but the shift from a high-carbon to a flexible, low-carbon grid depends on rapid deployment of variable renewables combined with significant investments in transmission, distribution and grid-balancing resources. Wood Mackenzie’s figures indicate cumulative transition investment needs of about $1.5 trillion between 2026 and 2035, with grid works, “the wires”, emerging as a decisive element, according to Rashika Gupta, Vice President, Power and Renewables Research at Wood Mackenzie. “The $1.5 trillion investment between 2026 and 2035 for energy transition is not just about adding megawatts; it is about the wires,” she said.

Market and regulatory reforms are being flagged as critical to unlocking private capital for these network upgrades. Wood Mackenzie highlighted the Electricity Amendment Bill as a potential enabler of distribution competition and clearer, longer-term investment signals; without such reforms, investors may remain wary of financing sophisticated grid projects at scale. Independent projections reinforce the magnitude of the task: Indian industry bodies and market studies point to several hundred billion dollars of spending required by 2030 on generation, transmission and storage to meet a 500 GW renewables ambition and to support an electricity system that could exceed 1,300–1,400 GW by 2035.

Despite rapid renewables roll-out, hydrocarbons will remain economically and operationally significant in the near term. Wood Mackenzie notes India is on course to reach its 1.5 billion tonnes coal production target by 2030 and that oil import dependence is projected to climb, creating strategic vulnerabilities. Natural gas presents both demand upside and supply questions; Wood Mackenzie projects domestic gas demand could double from roughly 72 bcm in 2024 to beyond 140 bcm by mid-century, with liquefied natural gas imports potentially rising to about 90 Mtpa by 2050 if gas remains price-competitive.

Material bottlenecks in manufacturing and storage threaten to slow deployment unless addressed. Although India has grown into the world’s second-largest solar module manufacturer, gaps remain in wafer and cell vertical integration. Wood Mackenzie warns that new domestic cell content rules from June 2026 may tighten near-term supply until additional capacity, estimated at about 24 GW, comes online. In batteries, announced Advanced Chemistry Cell capacity tops 200 GWh, but execution risks and scheme design flaws mean only roughly half that output may be realised by 2030, the consultancy estimates.

High-profile low-carbon technologies face an even steeper climb. India’s ambition to achieve 5 mtpa of green hydrogen by 2030 is dominated by early-stage project work rather than bankable assets, while carbon capture, utilisation and storage remains largely at the policy and pilot phase. “the 2026 launch of the Carbon Credit Trading Scheme (CCTS) marks a crucial transition from the PAT scheme’s energy-efficiency focus to mandatory emissions caps. By imposing these limits, India is decoupling industrial growth from carbon intensity and turning compliance into a competitive differentiator. Ultimately, this framework provides the regulatory certainty required to enable adoption of low-carbon technologies,” Hetal Gandhi, Lead – CCUS, Asia Pacific at Wood Mackenzie, said.

Policy-driven and multilateral finance is already beginning to position itself alongside private capital. The World Bank, for example, approved an additional $1.5 billion in financing in 2024 to support low-carbon pathways, including green hydrogen development and renewables scaling, signalling the kinds of blended finance instruments likely to be required. Domestic estimates and industry presentations similarly point to hundreds of billions of dollars of investment needs through 2030 for renewables, network reinforcement and storage, with transmission-only programmes in some reports reaching into the tens of trillions of rupees by 2035.

For industrial decarbonisation professionals, the implications are clear. Technology deployment alone will not be sufficient; success hinges on coordinated policy reform, finely targeted incentives and mobilising a mix of public, private and international finance to underwrite both generation and the grid that must carry it. Wood Mackenzie emphasises that India’s manufacturers and service providers have an opportunity to capture market share as global supply chains diversify away from China, but this will require sustained policy certainty, faster project execution and stronger domestic value chains for wafers, cells and batteries.

Ngu closed his assessment with a forward-looking note: by scaling domestic manufacturing and maintaining policy momentum, India could meet its 500 GW ambition and become central to the global renewable supply base. Whether that outcome materialises will depend on investment decisions made now and over the next decade, and on the ability of regulators, financiers and industry to translate targets into bankable, deliverable projects.