India adds 29GW of renewables in six months, with solar installations up 43%
Rooftop solar more than doubled on the back of a government subsidy scheme, but wind's 16% decline and grid constraints temper the outlook.
India added nearly 29 gigawatts of renewable energy capacity in the first half of 2026, with solar accounting for all but 2.9 GW of that total, JMK Research data published on Sunday (2026-07-12) showed. The pace means India has installed nearly 70% of its entire solar capacity from calendar year 2025 in just six months.5
Solar installations rose 43% year on year across that January-to-June period, with utility-scale projects contributing around 19 GW, up 32% from the same period in 2025. Rooftop solar added 6.4 GW, an increase of 104% year on year. Wind declined 16% to 2.9 GW — a divergence that matters in generation terms, since wind delivers power at hours solar cannot.5
The rooftop jump traces back to a single government scheme. Modi's PM Surya Ghar: Muft Bijli Yojana, which provides free electricity through subsidised rooftop panels, drove the majority of that segment's growth, JMK Research said. This moves the buildout beyond utility developers and into millions of households, altering both financing flows and grid management requirements.5
India's cumulative installed renewable capacity stood at around 288 GW at the end of June 2026, with solar now representing 56% of that total, wind 20%, and large hydro 18%. The Economist reported in May 2026 that India's entire generation capacity — clean and fossil combined — was roughly 400 GW, putting renewables well past the majority of installed capacity even as coal continues to dominate actual generation.5,1
The acceleration sharpens the outlook for seaborne thermal coal. In 2025, Carbon Brief analysis found that coal power generation in India fell 3.0% year on year — part of the first simultaneous decline alongside China in over half a century — as record clean energy additions cut into generation share.3 If the solar addition rate from the first half of 2026 is sustained through the second half, pressure on coal dispatch deepens further. Newcastle coal physical prices stood at $117.35 per tonne as of Monday (2026-07-13), and demand signals from India's grid will be watched for any directional shift.
Transmission capacity is the variable most likely to determine whether commissioned solar actually generates. Power Grid Corporation of India — PGCIL — controls roughly 84% of India's inter-regional transmission capacity and won more than half of competitive project awards in fiscal year 2025, according to a report published in May 2026.2 Grid bottlenecks and execution risks remain the primary constraints analysts flag when assessing India's buildout claims against likely output.
Open-access solar offers a partial read on the system's absorption. India added 2.7 GW of solar open-access capacity in Q1 2026 (January to March 2026), up 55% from 1.7 GW in Q4 2025 and 160% higher than a year earlier, Mercom India data showed. Total open-access capacity reached 32.9 GW.4 This segment — where commercial and industrial buyers contract directly with generators — relies less on PGCIL's high-voltage backbone. Its acceleration suggests corporate demand for clean power is outrunning policy-driven utility targets.
India's stated 2030 targets include cutting emissions by one billion tonnes from their current trajectory and substantially increasing non-fossil power generation. Bloomberg New Energy Finance estimated those goals would require around $500 billion in clean energy and grid spending.1 The H1 2026 installation rate runs ahead of the historical baseline required to reach them — but the gap between installed capacity and actual generation, widened by grid constraints and wind's underperformance, means the figures do not translate one-for-one into reduced coal burn.
Wind is the signal worth watching. Its 16% decline in the first half of 2026 offsets part of the solar gains in generation terms, since wind delivers capacity factor advantages utility solar cannot replicate across India's northern and central grid zones. Whether wind project pipelines recover in the second half of 2026, or whether grid absorption limits become the binding constraint, will set the pace for what is already the fastest renewable buildout in India's history.5