This paper focus on the need of expansion of regional cooperation in South Asia (SA) and Southeast Asia (SEA). Cross-border power trade is already underway in both regions, and further integration through sub-regional and interregional interconnections can help reduce fossil fuel use and boost RE adoption. The Bangladesh-Bhutan-India-Nepal (BBIN) countries could save 403 million tonnes of CO2 by harnessing Bhutan, India, and Nepal’s RE potential to meet growing electricity demands. This model offers cost-effective decarbonization and benefits for all nations involved. Smaller countries with large RE potential, such as Bhutan, Nepal, Laos, and Myanmar, can export power, promoting economic growth. By 2050, both SA and SEA can achieve substantial power generation, with grid connectivity enabling greater trade opportunities and efficiency.
