(Reuters) - Nepal has begun exporting 40 megawatts (MW) of electricity to Bangladesh through India's power grid in its first move into the international energy market and positioning India as a key facilitator of regional electricity trading.

Nepal is also exporting 80 MW to Bihar state in India's east, Nepal's Energy Minister Dipak Khadka said on X on Sunday, adding that power exports had unlocked a 5,000 MW export market for the Himalayan nation.

The power transaction follows a tripartite agreement signed in October between Nepal Electricity Authority, Bangladesh Power Development Board, and India's NTPC Vidyut Vyapar Nigam.

India exports electricity to Nepal, Bangladesh and Myanmar, while importing power from Nepal and Bhutan and is discussing plans to integrate its grid with Sri Lanka.

The development comes as Nepal rapidly expands its hydropower capacity, with Indian hydro power producer SJVN currently developing the 900 MW Arun-3 project in Nepal's Sankhuwasabha district.

In April, India's Power Grid Corporation and Nepal Electricity Authority agreed to implement high-capacity cross-border transmission infrastructure to facilitate increased power trading.

Nepal, which has installed capacity of more than 3,000 MW, with 95% hydro, has also been seeking Indian investment to boost its hydroelectric output and export surplus power to New Delhi.

(Reporting by Sethuraman NR; Editing by Kate Mayberry)