India added a record 4.9 GW of rooftop solar capacity in the first nine months (9M) of calendar year (CY) 2025—around 157% up year-over-year (YoY) from 1.9 GW installed in 9M 2024. With this, the nation has reached a cumulative installed rooftop solar capacity of 18.6 GW as of Sept. 30, 2025, according to Mercom India’s newly released Q3 2025 India Rooftop Solar Market Report.
In the third quarter (Q3) of 2025, 2.1 GW of rooftop solar capacity was installed, marking the highest quarterly additions to date. This represents more than 165% YoY growth from 791.1 MW in Q3 2024.
The PM Surya Ghar initiative remained the dominant contributor in Q3, making up 73% of rooftop solar installations in the quarter. The industrial segment accounted for nearly 20% of the quarter’s installations. The commercial and government segments accounted for nearly 6% and more than 1% of capacity additions, respectively.
Rooftop solar capacity additions under the capital expenditure (CAPEX) model accounted for 84% of the quarterly installations.
“Like utility scale, rooftop installations in the first nine months of the year have already surpassed all of last year’s additions,” said Raj Prabhu, CEO of Mercom Capital Group. “Residential installations, which made up only a third of rooftop solar three years ago, now account for 75% of the market. We expect this trend to continue until the PM Surya Ghar target is reached. The awareness created by the program is also likely to influence smaller C&I customers and encourage them to go solar. To keep this momentum on track, quality control in residential systems and persistent cost and supply challenges will need ongoing attention from the policymakers.”
Uttar Pradesh led the country’s rooftop solar capacity additions, accounting for 16% of the quarterly installations. Maharashtra and Gujarat ranked second and third, respectively, accounting for more than 15% and 14% of capacity installed during the quarter.
Assam achieved the highest compounded quarterly growth rate of more than 35% between Q3 2024 and Q3 2025.
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