Tamil Nadu, one of India's earliest adopters of renewable energy, built a formidable wind power ecosystem and held the title of the country's largest wind energy producer for years. Although Gujarat overtook it in installed wind capacity recently, Tamil Nadu remains the nerve center of India's wind industry and is striving to regain leadership through repowering, grid upgrades, and fresh investments.
Solar Capacity Overtakes Wind
In a significant milestone, Tamil Nadu's cumulative installed solar capacity has surpassed its wind power capacity. As of April 2026, solar capacity stood at 13,871 MW across utility-scale, rooftop, and other segments, compared with 12,159 MW of wind capacity. The state's solar capacity has nearly tripled from 5,067 MW in March 2022, an addition of 8,804 MW representing a growth of about 174%. Installations crossed the 10-GW milestone in March 2025 and rose by another 3,717 MW in just over a year.
Drivers of Solar Growth
According to Aneesh Sekhar, former MD of Tamil Nadu Green Energy Corporation, the addition of over 3 GW of solar capacity in the last year reflects overwhelming investor interest. He noted that with adequate grid connectivity, annual additions of 5 GW to 6 GW are achievable. Key drivers include the state's favorable open-access policy framework, increasing industrial commitments to green-energy targets, and Carbon Border Adjustment Mechanism (CBAM) regulations in Europe that encourage companies to source renewable power.
Another factor is the rapid development of battery energy storage systems. Sekhar explained that solar now has a viable storage solution through batteries, making it easier to add solar capacity than wind capacity. Wind is seasonal and lacks an equivalent large-scale seasonal storage solution, whereas solar generation follows a predictable diurnal pattern, facilitating storage and management.
Solar Manufacturing Hub
Tamil Nadu has emerged as a major destination for solar manufacturing investments. Tata Power and Vikram Solar have established large cell and module production facilities in the state. Tata Power's Tirunelveli facility, developed with an investment of about ₹4,300 crore, houses 4.3 GW each of solar cell and module manufacturing capacity, making it one of the country's largest integrated solar manufacturing units.
Wind Sector Developments
The wind sector continues to gain momentum through repowering initiatives and transmission upgrades. Nearly 2,500 MW to 3,000 MW of ageing wind capacity is eligible for repowering, which could significantly increase generation from existing sites. Industry stakeholders highlight that repowering ageing turbines has the potential to transform the sector and reinforce Tamil Nadu's longstanding leadership in renewable energy.
However, high land costs in Tamil Nadu compared with states like Andhra Pradesh, Gujarat, and Karnataka constrain new greenfield wind investments. Industry players expect the new government to bring greater transparency to land transactions to attract fresh investments and strengthen the state's position in clean energy and allied sectors.
Conclusion
Solar energy has emerged as the new growth engine of Tamil Nadu's clean-energy transition, expanding rapidly due to abundant sunshine, supportive policies, declining technology costs, growing storage deployment, and rising demand from industries and households. Once known primarily as India's wind capital, the state is steadily evolving into one of the country's most important solar power hubs.
