India’s Cross-Border Grid Capacity Set to Triple by 2031

New data from Renewable Watch indicates that India’s cross-border electricity grid interconnections are expanding significantly. As of September 2025, the total cross-border transmission capacity stands at 10,323 MW. This infrastructure development is part of a broader strategy aimed at supporting renewable energy integration and facilitating participation in regional power markets.

The report suggests these interconnections will help India manage variable renewable generation while strengthening ties with neighboring countries. By increasing transmission capacity, the grid can better accommodate power flows across borders, potentially stabilizing supply and demand fluctuations. The figures provided reflect the current state of infrastructure, highlighting the scale of existing connections before further planned expansions.

Renewable Watch notes that this growth aligns with national goals for energy security and decarbonization. While the specific mechanisms for market participation are still being defined, the physical capacity increase provides the necessary foundation for cross-border energy trade. The data underscores the technical readiness of the grid to handle increased international power exchanges.

Current Network Breakdown

The existing 10,323 MW capacity is heavily skewed toward the Himalayan neighbor, reflecting long-standing hydroelectric partnerships. Bhutan dominates the current infrastructure with 7,560 MW transmitted through seven synchronous lines. This high-voltage synchronization allows for stable, bidirectional power flows, which is typical for mature interconnections where grid frequency stability is jointly managed. In contrast, the southern and eastern connections are far more modest. Bangladesh currently receives 1,160 MW through the Baharampur-Bheramara and Tripura-Comilla corridors. A significant portion of this flow originates from Adani Power’s Godda plant, which delivers 1,600 MW to Bangladesh via a dedicated transmission line. Such dedicated lines reduce congestion on the main grid, ensuring reliable delivery for specific industrial or commercial loads.

Nepal’s current contribution is 1,600 MW, but 8,100 MW is already under construction. This pipeline suggests a shift from simple bilateral exchanges to a more integrated regional grid. For developers, the mix of synchronous and asynchronous connections matters. Synchronous lines, like those to Bhutan, require strict technical coordination but offer higher efficiency for large-scale transfers. Asynchronous links, often used for smaller or newer connections, provide isolation from neighboring grid disturbances, offering a layer of protection for domestic stability.

Country	Current Capacity (MW)	Key Infrastructure Details
Bhutan	7,560	Seven synchronous lines
Nepal	1,600	8,100 MW under construction
Bangladesh	1,160	Baharampur-Bheramara and Tripura-Comilla lines
Adani Power (to Bangladesh)	1,600	Dedicated line from Godda plant
Myanmar	2-3	11 kV radial connection

The disparity between these figures highlights the maturity gap in regional interconnections. While the Bhutanese link is fully operational and substantial, the Myanmar connection remains a minimal 2-3 MW radial link at 11 kV. Such low-voltage radial connections are typically used for localized, short-distance exchanges and lack the resilience of meshed high-voltage grids. They are often the first step in establishing physical connectivity before larger investments in dedicated transmission corridors are justified. For investors, the current breakdown shows that while the total capacity is over 10,000 MW, the bulk is concentrated in a single country relationship, leaving significant room for diversification in the coming decade.

Future Expansion and Capacity

The scale of upcoming infrastructure projects signals a dramatic shift in India’s regional energy role. By 2030-31, the total cross-border transmission capacity is projected to reach nearly 25,800 MW, more than double the current installed base. This expansion is driven largely by the massive increase in connectivity with Nepal, where capacity is expected to exceed 15,000 MW by the same period. For grid operators, such a surge in capacity necessitates advanced management protocols to handle higher volumes of bidirectional power flow without compromising domestic stability. The sheer volume of new lines will require robust frequency control mechanisms, as the grid becomes increasingly sensitive to fluctuations from neighboring systems.

Beyond land-based connections, the proposed 1,000 MW HVDC subsea cable linking Madurai and Mannar in Sri Lanka represents a distinct technical and strategic development. High-voltage direct current technology is particularly suited for long-distance or underwater transmission, offering efficiency advantages over alternating current in such environments. This project would establish a direct physical link to the island nation, diversifying India’s export corridors beyond its immediate land borders. For developers, the combination of expanded land borders and new maritime links suggests a maturing regional market. The tripling of capacity by 2031 indicates a move from sporadic bilateral exchanges to a structured, high-volume regional power grid, requiring coordinated investment in both generation and transmission assets.

Regional Cooperation Milestones

• India shares land borders with Bangladesh, Bhutan, Myanmar, and Nepal.
• In October 2024, Nepal, India, and Bangladesh signed the first tripartite hydropower export agreement.

The structural reality of South Asian energy trade is defined by geography. India’s position as a central hub is underpinned by its shared land borders with Bangladesh, Bhutan, Myanmar, and Nepal. These physical connections form the backbone for any cross-border energy flow, distinguishing India’s regional role from island nations or those separated by water. The recent diplomatic breakthrough in October 2024 marks a shift from purely bilateral arrangements to a more complex, multilateral framework. The tripartite hydropower export agreement signed between Nepal, India, and Bangladesh is the first of its kind in the region.

Such tripartite agreements typically allow for more flexible routing of power, where generation from one country can be consumed in another through a neighboring grid. For hydropower, this is particularly relevant as water resources often cross national boundaries, making coordinated management essential. The agreement suggests a move toward integrated regional planning, where transmission assets are viewed not just as national infrastructure but as shared corridors. This kind of cooperation can help optimize the use of renewable resources, allowing countries to balance their own generation profiles against the output of their neighbors. It sets a precedent for how future energy security strategies might evolve beyond simple neighbor-to-neighbor exchanges.

What to watch

With the physical infrastructure largely mapped, the next phase hinges on regulatory clarity and market mechanics. Readers should monitor how grid operators implement the advanced frequency control mechanisms required to manage the surge in bidirectional power flows. As the network expands, the ability to isolate disturbances from neighboring systems without compromising domestic stability will test the resilience of these new protocols.

Investors need to watch for the operationalization of the tripartite hydropower framework. The shift from bilateral to multilateral agreements introduces complex routing and settlement dynamics. How tariffs are structured for power moving through multiple jurisdictions will determine the economic viability of these corridors for developers.

Finally, the progress of the subsea HVDC link to Sri Lanka offers a distinct technical watch-item. This project tests the feasibility of long-distance underwater transmission in the region. Success here would signal a maturation of India’s export strategy beyond land borders, potentially opening new maritime trade routes. For consumers, the ultimate indicator will be whether this increased capacity translates into more stable pricing and reliable supply during peak demand periods.