India Faces Growing Solar Power Curtailment Amid Grid Oversupply Challenges

India’s electricity grid is increasingly unable to handle the rapid influx of solar energy, forcing grid operators to curtail more renewable power. In October, solar curtailment rose to around 12% - the highest since May - with some days seeing up to 40% of generated solar power unable to reach consumers.

The imbalance stems from a mismatch between daytime solar generation and the limited flexibility of coal-based power plants, which cannot ramp down output quickly enough. As a result, the grid faces difficulties accommodating renewable energy during peak solar hours while still depending on coal to meet evening demand.

Wind power also experienced rare curtailments during the same period, indicating broader integration challenges for renewable sources. Experts emphasize the urgent need for large-scale energy storage solutions, such as batteries, to balance intermittent power and reduce waste.

India currently has about 44 gigawatts of renewable projects struggling to secure buyers. The government is reportedly considering canceling projects with limited offtake prospects, potentially impacting its target to reach 500 gigawatts of clean energy capacity by 2030.

Curtailment at 12 percent monthly average - with daily peaks reaching 40 percent - represents a meaningful economic loss for the sector: renewable generation that never reaches consumers is renewable generation that never earns revenue. The pattern reflects a well-understood technical challenge: coal-based generation's inability to ramp down quickly enough to accommodate solar's daytime peak, combined with insufficient storage or interconnection to absorb the excess.

The resolution pathway is equally understood, if not yet delivered at scale: large-scale battery storage to absorb daytime solar surplus for evening dispatch, more flexible thermal generation, and stronger inter-regional grid interconnection. Each of these is progressing, but the pace of curtailment is now outrunning the pace of solutions - a pattern that will likely persist through the mid-2020s.

For solar developers, storage operators, grid utilities and industrial buyers of clean power, Cognitud's energy transition, market intelligence and responsible investment teams help clients evaluate curtailment exposure by geography, structure storage-integrated PPA arrangements that capture value across the daily cycle, and prepare disclosures that reflect the operational reality of grid-integration challenges alongside the headline capacity progress.