Solar may remain king, but India’s next renewable boom could be in batteries and transmission

India’s renewable-energy story is entering a new phase. Solar power is expected to remain the largest source of new capacity through 2030, but the next wave of growth could increasingly come from the infrastructure needed to store, transmit and manage that electricity, according to the “Indian Renewable Energy Sector — 2026–2030: A Comprehensive Sector & Investment Outlook” research report.

As of July 31, 2026, India had 300.51 GW of total non-fossil capacity, including 291.73 GW of renewable energy. Solar accounted for 164.59 GW, making it the dominant source, while wind capacity stood at 58.14 GW.

Solar remains the primary growth engine

The report expects solar to continue leading India's renewable expansion through 2030. India added 14.33 GW of solar capacity between April and July 2026, taking cumulative solar capacity to 164.59 GW.

The International Energy Agency expects Indian solar generation to grow by around 24% annually through 2030, supported by falling solar technology costs, large-scale auctions, rising commercial and industrial demand, rooftop adoption, government incentives and domestic module manufacturing.

MUST READ: BT Explainer: Why JSW Group is putting its plans to make battery cells in India on hold

However, the rapid growth of solar is also changing the nature of the infrastructure challenge. Solar generation is concentrated during daylight hours, while electricity demand continues through the evening and night. This makes storage and grid infrastructure increasingly important to ensure that renewable power can be used when and where it is needed.

Batteries emerge as a major investment theme

Energy storage could be one of the biggest beneficiaries of India's next renewable cycle. The report gives battery storage a five-star conviction rating, placing it alongside solar and transmission and grid infrastructure among its highest-conviction investment themes.

Lithium-ion batteries, battery energy storage systems, pumped-storage hydro, flow batteries and emerging long-duration storage technologies are expected to play a larger role.

The basic model is straightforward: solar generation during the day can charge batteries, which can then discharge during evening peaks. This can improve grid flexibility and reduce the mismatch between renewable generation and consumption. The report says India's storage market therefore has the potential to grow much faster than the traditional renewable-generation market.

ALSO READ: JSW MG Motor launches India’s first mainstream plug-in hybrid Hector Tomahawk PHEV at ₹25.69 lakh

Transmission becomes the critical bottleneck

While storage addresses the timing problem, transmission addresses the location problem.

The report describes transmission as a “critical bottleneck and opportunity”, arguing that renewable generation cannot create economic value unless electricity can reach consumers. Renewable projects have already faced curtailment because transmission infrastructure has struggled to keep pace with rapid solar expansion.

This creates opportunities across transmission lines, substations, grid automation, smart grids, power electronics, energy-management systems, grid-scale storage and HVDC infrastructure.

The report's assessment is significant because it shifts the renewable investment story beyond power generators. Transmission companies, storage developers and equipment manufacturers could become increasingly important as renewable penetration rises.

199.5 GW capacity gap remains

India's clean-energy infrastructure build-out also has a substantial runway. With around 300.5 GW of non-fossil capacity already installed, the country would need approximately 199.5 GW of additional non-fossil capacity to reach the 500 GW objective by 2030.

That requirement extends the opportunity across solar and wind developers, renewable EPC companies, transmission firms, battery manufacturers, storage developers, equipment makers and clean-energy financiers.

At the same time, electricity demand is projected to grow by approximately 6.4% annually through 2030, driven by industrialisation, urbanisation, air-conditioning, data centres, manufacturing, electric vehicles and rising household consumption.

MUST READ: Ather’s ₹1 lakh gamble: Its cheapest scooter yet could shake up the EV market

From solar farms to a clean-energy ecosystem

The report ultimately argues that India's renewable transition is moving beyond simply adding generation capacity. Its final investment view describes the next phase as “Generation + Storage + Transmission + Manufacturing + Digital Grid + Green Molecules.”

Solar is still expected to remain the largest source of incremental capacity, but the supporting ecosystem could increasingly determine how effectively that capacity is integrated into the power system.

For investors, the report gives India's renewable-energy sector an overall 8.8/10 rating, or “Strongly Positive”, with solar, energy storage, and transmission and grid infrastructure receiving the highest conviction.

The central message is clear: India's next renewable boom may not be only about producing more clean electricity. It could increasingly be about building the batteries, transmission networks and grid infrastructure needed to make that electricity usable.