India and Bhutan Sign Tariff Protocol for Punatsangchhu‑II, Strengthening Hydropower Partnership

Why It Matters

The protocol secures a stable revenue stream for Bhutan while bolstering India’s renewable supply, strengthening regional energy security and deepening bilateral ties.

Key Takeaways

• Punatsangchhu‑II adds 1,020 MW to Bhutan‑India power pool
• Tariff protocol locks export price for Bhutan’s surplus electricity
• Reactive‑energy accounting improves cross‑border grid stability
• Enhanced framework expands cooperation beyond hydro to financing and transmission

Pulse Analysis

India and Bhutan’s hydropower collaboration has matured into a cornerstone of South Asian energy strategy. The 1,020 MW Punatsangchhu‑II plant, inaugurated in late 2025, is the latest addition to a portfolio that already includes the 2,000 MW Chukha and 1,200 MW Tala projects. By exporting surplus power to India, Bhutan monetizes its abundant water resources, while India gains a reliable source of clean electricity to meet its climate targets and offset coal‑generated capacity. The new tariff protocol formalizes the pricing mechanism, providing fiscal predictability for Bhutan’s government and investors.

Beyond pricing, the agreement introduces a methodology for reactive‑energy accounting, a technical advance that addresses voltage regulation and frequency control in an increasingly interconnected grid. This framework reduces transmission losses and enhances the efficiency of electricity trade, allowing both nations to optimize dispatch schedules and lower operational costs. For India, the improved grid stability supports the integration of additional renewable sources, while Bhutan benefits from reduced curtailment and higher utilization of its generation assets.

The protocol also embeds a broader institutional framework that extends cooperation into non‑hydro renewables, cross‑border transmission projects, and joint financing mechanisms. Regular reviews and capacity‑building initiatives aim to streamline project approvals and attract private capital, accelerating the region’s transition to a low‑carbon economy. As geopolitical dynamics shift, the strengthened energy partnership underscores a strategic alignment that could serve as a model for other trans‑border renewable collaborations in Asia.