India’s annual solar installations surpassed the 30 GW mark for the first time, with 36.6 GW added in calendar year 2025. Installations in 2025 rose nearly 43% year over year from 25.6 GW in 2024, according to Mercom India’s newly released Q4 and Annual 2025 India Solar Market Update.
Large-scale solar projects, including open access (off-site commercial and industrial) installations, accounted for nearly 81% of total additions, while rooftop solar contributed 19%.
In 2025, 29.5 GW of large-scale solar capacity was installed, a 31% increase from 22.5 GW in 2024. Open access projects represented 26% of large-scale additions. According to Mercom, record commissioning levels in 2025 were driven by supportive policies, accelerated project execution, and favorable market conditions.
Rajasthan, Gujarat, and Maharashtra led large-scale solar installations in 2025, accounting for around 34%, 28%, and 15% of the capacity additions, respectively.
“India recorded its highest-ever annual solar installations in 2025, reflecting strong demand and steady execution despite ongoing challenges,” commented Raj Prabhu, CEO of Mercom Capital Group.
Prabhu highlighted curtailment as the most pressing issue, particularly in solar-heavy states. “At the same time, the upcoming ALMM-II deadline is creating uncertainty around cell availability, raising the risk of short-term supply bottlenecks. Equipment delays and a growing PPA backlog also weigh on the market. Unless transmission expansion and manufacturing scale move in sync with capacity additions, growth will remain uneven in 2026,” he added.
In the fourth quarter (Q4) of 2025, India added 9.9 GW of solar capacity, up nearly 11% from 8.9 GW in Q3 2025 and 21% from 8.2 GW in Q4 2024. Large-scale solar installations totaled 7.6 GW. Rajasthan, Gujarat, and Andhra Pradesh led large-scale solar additions, accounting for around 41%, 25%, and 10% of installations, respectively.
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