Tata Power Solar, Roofsol Energy, Mahindra Solarize, Kalpa Power, and Hartek Group emerged as the top rooftop solar installers in India in 2025, according to Mercom India’s India Solar Market Leaderboard 2026.

Together, these five companies accounted for nearly 23.6% of the total rooftop solar market.

India added 7.1 GW of rooftop solar capacity in 2025, marking an 123.3% increase from 3.2 GW in 2024, as per Mercom India’s 2025 Q4 & Annual Mercom India Rooftop Solar Market Report. The PM Surya Ghar: Muft Bijli Yojana continued to dominate rooftop solar additions, supported by integration with the JanSamarth platform for end-to-end digital processing.

Waived feasibility checks for systems up to 10 kW and automatic net metering approvals improved installation timelines. Additional state subsidies in Uttar Pradesh, Delhi, Odisha, Haryana, Assam, Andhra Pradesh, and Maharashtra further boosted momentum under the PM Surya Ghar program.

As of December 2025, India’s cumulative rooftop solar capacity stood at 20.8 GW.

Tata Power Solar retained its leadership position, accounting for 19.2% of rooftop solar installations in 2025. The company has a diversified portfolio across commercial, industrial, and residential segments, supported by a nationwide dealer network, financial modes, and integrated solar solutions. The residential segment, with 58%, was the main contributor, especially in Maharashtra, Gujarat, Tamil Nadu, and Chhattisgarh.

Roofsol Energy ranked second, primarily focusing on the commercial and industrial (C&I) segment. The company secured ₹2.1 billion (~$24.67 million) in funding from Aseem Infrastructure Finance in May 2025 to expand rooftop and open access projects for C&I units across multiple locations in India.

Mahindra Solarize ranked third with rooftop solar installations across C&I and residential segments. The company’s client base includes firms from the textile and automotive sectors. As the distributed solar EPC arm of the Mahindra Group, it continues to expand its rooftop footprint across key cities, including Lucknow, Pune, Nashik, Ahmedabad, and Mumbai.

 

Kalpa Power moved up in the rankings to fourth place, recording 17.2% year-over-year growth in installations, supported by its rooftop and open access solar offerings and asset management services for C&I clients across India.

Hartek Group climbed up to the fifth rank with a 36.4% YoY growth, delivering turnkey EPC services for ground-mounted and rooftop solar projects and supporting power infrastructure and grid integration. The installations were spread across food processing, automotive, steel, chemicals, and other industries. In January 2025, Hartek won an EPC contract from Kandhari Beverages for an 8 MW rooftop solar installation in Jammu and Kashmir.

Rising participation from new players in rooftop solar signals expanding competition across residential and C&I segments. This trend reveals a diversifying installer landscape with competitive pressure extending beyond established industry leaders.

Importantly, companies outside the top 10  accounted for nearly 74% of total installations, illustrating the rooftop solar sector’s broad-based growth.

Mercom’s India Solar Market Leaderboard provides a detailed analysis of market trends, competitor analysis, and company performance across the solar supply chain.

For the detailed and comprehensive report, click here.

A complete list of solar rooftop installers and quarterly market share is available through Mercom’s India Solar Market Share Tracker.