India's ambitious target of achieving 500 gigawatts (GW) of non-fossil electricity capacity by 2030 is facing significant hurdles, primarily due to the slow expansion of its transmission infrastructure. A recent report by global energy think tank Ember highlights that transmission constraints were responsible for nearly two-thirds of all renewable energy curtailment in the first quarter of 2026, totaling 300 gigawatt-hours (GWh).
Grid Delays Hamper Renewable Energy Expansion
Over the past five years, India has consistently fallen short of its annual transmission targets, delivering only about 80% of planned capacity. This shortfall has led to a growing backlog and substantial energy losses. For instance, on March 30, 2026, India lost approximately 34 GWh of renewable energy generation in a single day due to insufficient transmission margins. This amount is equivalent to the daily power consumption of around 5 million middle-class urban households in India.
The pace of renewable energy project development, particularly solar, is now outpacing the grid's ability to evacuate the generated power. This imbalance is creating critical operational risks for the country's 2030 green energy goal.
Project Delays and Regional Bottlenecks
Renewable energy projects slated for the financial year 2026–27 are projected to experience average connectivity delays of four to five months beyond their scheduled commissioning timelines. Out of 45 GW of planned projects, approximately 20 GW could face delays extending beyond this period.
These delays are particularly acute in certain regions. Rajasthan's pooling stations, for example, are experiencing significant backlogs, affecting over 12 GW of solar and wind capacity. Additionally, about 8 GW of combined capacity in the Western and Southern Regions are similarly impacted. Such delays not only impose financial strain on developers but also result in system-level opportunity costs due to underutilized generation capacity.
Structural Issues Impede Transmission Growth
The core of the problem lies in execution risks within the Inter-State Transmission System (ISTS) schemes, with about one in four projects nationwide experiencing delays of a year or more. Several structural issues contribute to these holdups:
- Right-of-way disputes
- Fragmented land ownership
- Challenges in securing forest and biodiversity clearances
- A limited global supplier base for high-voltage direct current (HVDC) components
These are complex challenges that cannot be resolved by capital investment alone.
The concentration of utility-scale solar and wind capacities in states like Rajasthan (Northern Regional Grid) and Gujarat (Western Regional Grid) further exacerbates the issue. This geographical concentration, combined with delayed transmission infrastructure, leads to long queues at key pooling stations, prolonging connectivity delays for new projects.
Paths Forward: Planning and Technology
Addressing this growing mismatch requires a shift from a reactive approach to a more proactive one. Long-term planning reforms should integrate generation and transmission planning co-optimally, rather than having transmission planning constantly respond to generator needs.
Introducing stronger market signals is also crucial. This would help guide generation siting decisions, improve network utilization, and support a more cost-optimal system expansion. In the near term, deploying Battery Energy Storage Systems (BESS) at renewable pooling stations offers a credible solution for transmission augmentation and curtailment avoidance. While the technical and infrastructural components for BESS integration are largely in place, regulatory gaps and the need for a robust commercial case currently inhibit their widespread deployment.