Why storage is the missing layer in India’s clean energy story

What would it take for the world’s third-largest solar market to also become one of its most resilient energy systems?

In April 2026, India recorded its highest-ever electricity demand of 256 GW, as temperatures surged across large parts of the country. Solar generation contributed nearly 58 GW during peak afternoon hours, helping meet rising daytime demand before tapering off towards evening. Other sources stepped in to maintain reliability and keep the grid stable.

The moment reflected both the progress India has made in renewable energy and the next phase of the transition ahead. The challenge is no longer only about generating renewable power at scale. It is about ensuring that clean energy remains available when demand is highest.

India’s power demand profile is evolving rapidly. Solar generation peaks during the middle of the day, while electricity demand often remains elevated well into the evening, driven increasingly by cooling needs. As renewable energy capacity expands, ensuring that clean power remains available across all hours of the day is becoming central to grid planning.

The evidence is already visible across the grid. Between May and December 2025, India curtailed more than 2.3 terawatt-hours of solar generation because excess midday renewable power could not always be absorbed efficiently into the system. In the same period, the National Load Dispatch Centre flagged a potential shortfall of 15 to 20 GW during evening hours when solar output drops and demand holds firm.

A recent report by Citigroup described this transition clearly: the challenge is shifting from “not enough energy” to “not enough dispatchable energy at the right hour.” The report also highlighted that India’s power sector could begin experiencing supply strain during non-solar hours if storage deployment does not keep pace with renewable energy growth.

India’s peak electricity demand has more than doubled over the past decade, while air-conditioning and cooling loads are becoming some of the fastest-growing drivers of consumption. Electricity demand in April 2026 alone rose nearly 9% year-on-year due to heat-driven cooling demand.

Recognizing this shift, India has already begun laying the foundations for a storage-enabled energy system.

The country has committed to achieving 500 GW of non-fossil fuel capacity by 2030, one of the world’s most ambitious clean energy targets. The Central Electricity Authority has projected a requirement of 47.2 GW of battery storage capacity by 2032 to support reliable renewable energy integration at scale. Importantly, storage is no longer being treated as a future technology layer, but as a core part of India’s evolving energy infrastructure.

For much of the past decade, the technical case for battery storage was clear, but costs remained a constraint. That equation is now changing rapidly. Battery storage auction tariffs in India declined by over 65% between 2022 and 2024, while global battery costs have also fallen sharply in recent years. Research by Ember now estimates that solar-plus-storage capable of meeting 90% of India’s electricity demand can be delivered at INR 5.06 per kWh, a number that increasingly competes with retail grid tariffs in many states.

Policy momentum is accelerating alongside these economic shifts.

Government programmes are supporting both battery deployment and domestic manufacturing, while renewable energy tenders are increasingly incorporating storage components. Initiatives such as PM Surya Ghar Yojana are also accelerating rooftop solar adoption across Indian households. As of early 2026, the programme had enabled rooftop solar installations across nearly 30 lakh homes, with a target of one crore households by 2027, laying the foundation for a more decentralized and resilient energy system.

Importantly, India is already building the policy, manufacturing and market foundations needed for large-scale storage adoption. From rooftop solar programmes and storage-linked tenders to domestic battery manufacturing incentives, policy direction is increasingly aligned with the realities of a renewable-heavy grid.

At the utility scale, integrated solar-plus-storage projects are beginning to move from pilot stage to mainstream deployment. At the residential level, battery-backed rooftop solar systems are gradually changing how households interact with energy.

A home equipped with rooftop solar and battery storage is no longer entirely dependent on the timing of grid supply. It can store excess daytime generation and use it during evening hours, when electricity demand and system stress are highest. In rural India, this can improve reliability during outages. In urban India, where time-of-use tariffs are likely to become more common, it can create significantly greater long-term savings and resilience.

The focus now is shifting towards execution at scale. India has already seen rapid growth in storage tenders and project announcements. The next phase will require coordinated progress across financing, transmission infrastructure, supply chains, and project execution to convert announced capacity into operational systems at scale.

This opportunity extends far beyond India.

Across Southeast Asia, Sub-Saharan Africa and Latin America, many emerging economies are navigating similar conditions: rising electricity demand, strong solar potential, and the need for more flexible power systems. As storage costs continue to decline, solar-plus-storage systems are becoming increasingly viable pathways towards affordable and reliable clean energy access.

If India can demonstrate how storage can be scaled affordably across utility, commercial and residential layers simultaneously, it will offer a credible blueprint for energy transitions across the developing world.

The direction is already clear. Battery costs will continue falling. Solar capacity will continue expanding. Electricity demand will continue rising as summers arrive earlier and run hotter across many parts of the world.

India has the solar resource, the policy ambition and the manufacturing intent to lead this transition. The infrastructure is being built. The economics are improving. As storage scales alongside renewable energy, India has the opportunity to build one of the world’s most resilient, decentralized

and future-ready clean energy systems, and offer a powerful blueprint for emerging economies around the world.