Q3 2025 MERCOM INDIA SOLAR OPEN ACCESS MARKET REPORT - 6.1 GW INSTALLED IN 9M 2025
In the first nine months (9M) of calendar year (CY) 2025, India added nearly 6.1 gigawatts (GW) of solar open access capacity, up over 13% from 5.4 GW in 9M 2024, according to the Q3 2025 Mercom India Solar Open Access Market report.
India added 2.2 GW of solar open access capacity in the third quarter (Q3) of 2025.
Open access installations maintained year-over-year (YoY) growth driven by steady demand from commercial and industrial consumers, resulting in increased installations in 9M 2025.
Capacity additions in Q3 were, however, hampered by delays in grid connectivity approvals, restricted substation access, and limited transmission evacuation capacity in states with weaker grid infrastructure.
In Q3 2025, Karnataka led solar open access capacity additions, accounting for nearly 38% of installations. Rajasthan and Gujarat followed, accounting for approximately 25% and 11%, respectively.
As of September 2025, the cumulative installed solar open access capacity stood at 27.9 GW.
Karnataka remained the leading state in cumulative installations, accounting for nearly 25% of solar open access capacity. Maharashtra and Gujarat ranked second and third, with 17% and 12% of total installations, respectively, through the end of Q3 2025.
In Q2 2025, Adani Green Energy was the top seller in the Green Day-Ahead Market (G-DAM), accounting for approximately 44% of electricity sold.
Odisha was the leading procurer from G-DAM, contributing to 449.7 MU.
In the Green Term Ahead Market (G-TAM), electricity traded on the IEX totaled 92.7 million units (MU) in April, 73.9 MU in May, and 30.3 MU in June.
The cleared volume of Renewable Energy Certificates (RECs) traded on the Indian Energy Exchange (IEX) fell 16% QoQ.
The Q3 2025 Solar Open Access report provides a comprehensive analysis of the solar open access market, retail electricity tariffs, PPA prices, and open access charges and costs for fifteen states.
Key Highlights from Mercom’s Q3 2025 India Solar Open Access Market Report
- In 9M 2025, India added 6.1 GW of solar open access capacity, up 13% YoY
- In Q3 2025, 2.2 GW of solar open access was added, down 20% QoQ and up 108% YoY
- Karnataka led capacity additions, accounting for nearly 38% of solar open access capacity added in Q3 2025
- Rajasthan and Gujarat ranked second and third, contributing 25% and 11% respectively, of the quarter’s installations
- As of September 2025, cumulative installed solar open access capacity was over 27.9 GW
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MERCOM INDIA RESEARCH
Mercom India Research is a leading research and consulting firm at the forefront of India’s clean energy transformation delivering timely, relevant market intelligence and advisory for India’s energy markets.
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