India’s renewable electricity generation (excluding large hydro) hit 101 billion units in the second quarter of fiscal 2027, marking a historic high. While solar energy growth reduced coal plant usage to 68%, grid constraints led to the waste of 1.8 billion units of power. The sector faces a mix of rapid green energy expansion and lingering infrastructure challenges.
India’s power sector achieved a significant milestone in the second quarter of the 2026-27 fiscal year, as renewable energy generation (excluding large hydro) crossed the 100 billion units (BU) mark for the first time. The total generation reached 101 BU, reflecting the country's rapid push toward non-fossil fuel energy. When combined with large hydro and nuclear power, the total non-fossil fuel generation hit a record 177 BU for the quarter.
This growth in renewable energy is directly impacting how India manages its power grid. Peak electricity demand touched an all-time high of 270 gigawatts (GW) on July 16, 2026, marking an 18% increase compared to the same period last year. Despite this massive demand, the reliance on coal-fired thermal power plants eased slightly. The utilization of these thermal plants, known as the plant load factor, dropped to 68% during the quarter, down from 73% in the previous period. This reduction suggests that solar and wind power are increasingly meeting daytime electricity needs.
The Challenge of Grid Infrastructure
While the generation numbers are positive, the transition is not without friction. A critical issue for investors to note is the curtailment of power. Approximately 1.8 billion units of renewable electricity were wasted during July and August 2026 because the transmission grid could not absorb all the power produced. This highlights a clear infrastructure bottleneck. For renewable energy companies, such waste represents lost revenue, as they are unable to sell all the electricity they generate due to these grid constraints.
Coal Supply and Systemic Risks
Although renewable capacity is growing, India remains heavily dependent on coal, which still provides roughly two-thirds of the total electricity. The power sector continues to face risks related to coal supply chains. As of September 30, 2026, coal inventory levels at power plants were at 36% of the required normative levels. This leaves the national power system vulnerable. If inventory levels remain low, any disruption in coal logistics could force the grid to rely more heavily on expensive or scarce resources to meet peak demand.
Investor Monitorables
Looking ahead, the sector’s financial performance will likely be tied to two key areas beyond just generation capacity. First, the pace of investment in transmission and grid infrastructure will be vital to reduce the 1.8 billion units of wasted energy. Investors may track whether upcoming projects successfully bridge the gap between generation and transmission. Second, the stability of the coal supply chain remains a critical monitorable, as thermal power continues to provide the essential base-load that stabilizes the grid when renewable sources like solar and wind are not producing at full capacity.