Whalesbook
Grid Bottleneck Stifles India's Renewable Energy Boom
India's ambitious expansion of clean energy is hitting a major roadblock: the nation's power grid cannot handle the influx of new solar and wind power. In the first three months of 2026, approximately 300 gigawatt-hours (GWh) of renewable electricity had to be curtailed, meaning it was generated but could not be sent to consumers. This wasted energy represents a significant portion, nearly two-thirds, of the total 470 GWh of renewable energy losses across the national grid during that period.
Years of Underinvestment Plague Grid Development
For the past five years, India has consistently missed its targets for building new transmission lines, only completing about 80% of its annual goals. This ongoing lag has created a large backlog of delayed projects, a problem that is worsening as solar and wind farms are built at a faster pace. Energy experts warn that this growing gap between clean energy generation and the grid's capacity is a serious threat to India's goal of having 500 gigawatts (GW) of non-fossil fuel electricity by 2030. Duttatreya Das, an energy analyst at Ember, noted that the increasing mismatch between how quickly renewable energy is deployed and how ready the transmission infrastructure is has led to these substantial power losses.
Project Delays Ripple Across Regions
These grid limitations are causing widespread issues. An estimated 20 GW of renewable energy projects planned for completion in fiscal years 2026-27 could face connection delays of over four months. Rajasthan is particularly affected, with more than 12 GW of solar and wind projects experiencing these delays, and another 8 GW in western and southern regions are also at risk. Across the country, one in every four new transmission projects is delayed by at least a year. The eastern and northeastern parts of India face even greater challenges, with half of their projects expected to be delayed by a year or more. Common causes for these extended timelines include difficulties in acquiring land, securing rights-of-way, obtaining forest clearances, and issues with the global supply chain for crucial high-voltage direct current (HVDC) equipment.
Network Congestion Spurs Search for Solutions
The current Indian transmission network, which spans roughly 503,661 circuit kilometers, is under immense strain. The National Transmission Plan aims to expand it to 648,190 circuit kilometers by 2031-32, requiring an average annual increase of about 24,000 circuit kilometers. However, renewable energy projects, which typically take 12 to 18 months to develop, are being built much faster than traditional thermal power plants (36 to 60 months). This speed difference intensifies network congestion, especially in states like Rajasthan and Gujarat that have a high concentration of renewable energy sources. As of March 2026, India had 43.7 GW of solar and 12.5 GW of wind capacity connected to its inter-state transmission system.
To combat these energy losses, battery energy storage systems (BESS) are being proposed as a practical, near-term fix. Experts estimate that 3-4 GW of two-hour battery storage could capture most of the renewable energy currently being curtailed. Fortunately, around 236 GW of battery connection capacity is already available at major renewable energy hubs. Analysts suggest regulatory changes, such as allowing battery storage to be treated as a transmission asset, could speed up its adoption for grid support. The financial case for BESS is strong, with the cost of delivering stored renewable power estimated between Rs 7-8 per kilowatt hour (kWh), which is less than the Rs 9-10 per kWh many states currently pay for peak electricity.