Laos–Thailand electricity trade (1971–present)
Laos's first major dam, Nam Ngum 1, began exporting hydropower to Thailand in 1971, launching the country as an electricity seller. Sales to Thailand grew into a main revenue source over the following decades.
Power exports became Laos's largest source of foreign earnings, funding further dam construction.
The 'battery of Southeast Asia' label stuck, but Laos's own grid stayed weak and swung between wet-season glut and dry-season shortage.
That seasonal imbalance is exactly what the China-Laos line is built to fix — it lets Laos export surplus and import to cover shortfall.
