25 Dec, 2025
Laos Section of Laos-China 500kV Power Interconnection Reaches 80% Completion
The Lao section of the Laos-China 500-kilovolt (kV) power interconnection project has reached 80 percent completion, one of the country’s most important cross-border energy infrastructure projects in northern Laos.
Vilaxay Xayluangsy, a technical officer from Electricité du Laos Transmission Company Limited (EDL-T) under the Construction Department, confirmed the milestone during an interview with Lao state media on 19 December at Namor 3 Power Station in Namor district, Oudomxay Province.
The project is being developed in two phases. EDL-T is responsible for the Lao section, while China Southern Power Grid (CSG) manages the Chinese section, which includes a 145-kilometer, 500kV transmission line from Xishuangbanna Dai Autonomous Prefecture to the Lao border.
This interconnection is expected to support major renewable energy developments in northern Laos, including the 1,000-megawatt solar power project in Oudomxay Province, which was inaugurated on 13 December. Phase I of the solar facility is projected to generate 1.7 billion kilowatt-hours annually, with electricity transmitted to China’s Yunnan Province through the new interconnection.
Beyond these bilateral benefits, the project will enhance power system stability, facilitate clean energy exports, and strengthen Laos’ electricity connections with neighboring countries, including Thailand, Vietnam, Cambodia, and Myanmar.
Once completed, the Lao government said the Laos-China 500kV interconnection will be a cornerstone in its plan to position the country as a regional clean energy hub in the Lancang-Mekong region.
Project Background
Construction of the Lao section began in late February 2025, following an official launch ceremony in Vientiane Capital. The project is expected to be completed by April 2026, with full operations scheduled to commence later that year.
The Lao section encompasses Oudomxay and Luang Namtha provinces and includes construction of a new 500kV substation in Namor district.
This substation will connect to Xishuangbanna in Yunnan Province, China, via a 183.5-kilometer cross-border transmission line.
Once operational, the interconnection will enable two-way power assistance of up to 1.5 million kilowatts and facilitate transmission of approximately 3 billion kilowatt-hours of clean electricity annually, enough to power millions of households for an entire year.