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China-Laos power line tops 1 billion kWh in six months

China-Laos power line tops 1 billion kWh in six months

Built World

The 500-kilovolt link has carried 1 billion kWh since April, avoided over 800,000 tonnes of CO2 and stayed available above 99.7% of the time

October 8th, 2026: Cumulative flow tops 1 billion kWh

Overview

Updated Oct 25

A 500-kilovolt power line between China and Laos has carried more than 1 billion kilowatt-hours since it switched on in April. China's first cross-border alternating-current link at that voltage passed the mark on October 8, and it raised two-way exchange capacity between Yunnan and northern Laos from 50 megawatts to 1.5 gigawatts.

Lao hydropower has been reaching the Guangdong-Hong Kong-Macao Greater Bay Area since August 6, a run due to end in late October at about 600 million kWh. China Southern Power Grid says the line has cut carbon dioxide emissions by more than 800,000 tonnes and stayed available above 99.7% of the time since it opened.

Why it matters

The line lets Lao solar and hydropower reach Chinese cities and Yunnan backstop Laos in dry season — a working template for Mekong power trade.

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Key Indicators

1 billion kWh
Cumulative electricity transmitted
Total power moved through the line since commissioning on April 20, 2026.
1.5 GW
Two-way exchange capacity
Up from 50 megawatts under earlier lines, a 30-fold increase.
800,000 t
CO2 emissions avoided
Carbon dioxide reduction attributed to the green power sent through the line since April, per Seetao.
99.7%
Cross-border availability
China Southern Power Grid reports the channel has had no safety accidents and stayed above this availability rate since commissioning.
177.5 km
Transmission line length
145 km in China, 32.5 km in Laos.

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People Involved

Malaithong Kommasith
Malaithong Kommasith
Lao Minister of Industry and Commerce
Oversees Laos's energy and trade policy as the line came online
ZS
Zhang Shaohui
Official, China Southern Power Grid's Lancang-Mekong unit
Pushing cross-border participation in China's regional electricity market

Organizations Involved

China Southern Power Grid
China Southern Power Grid
State-owned power grid operator
Built and operates the Chinese section of the line; runs the regional power market it feeds

China's state grid operator for the southern provinces, including Yunnan.
EL
Electricite du Laos Transmission Company Limited (EDL-T)
National transmission utility
Built and operates the 32.5-km Lao section

Laos's state transmission company, responsible for the national high-voltage grid.

Timeline

February 2025 October 2026

8 events Latest: October 8th, 2026 · 1 month ago
Tap a bar to jump to that date

  1. Cumulative flow tops 1 billion kWh

    Latest Milestone

    Cumulative transmission exceeds 1 billion kWh, Yunnan Power Grid reports.

  2. China-Laos Joint Operations Committee Formed

    Institutional

    First plenary session held in Dali, Yunnan. Both sides signed a trial charter and set up five working groups for dispatch, trading, safety, maintenance, and standards.

  3. First Digital Yuan Settlement of Project Funds

    Finance

    China Southern Power Grid completed the first digital yuan cross-border settlement of project funds using blockchain and smart contracts, covering financing, settlement, and subcontractor payments.

  4. Lao hydropower reaches Guangdong

    Trade

    Lao hydropower delivered to the Guangdong-Hong Kong-Macao Greater Bay Area through the line.

  5. Green Power Certificate MoU Signed

    Trade

    Nam Tha Mekong International Company and Electricite du Laos agreed to study Lao green power and green certificate cooperation.

  6. Line switches on

    Commissioning

    Line commissioned; first Lao solar exports reach Yunnan, a cross-border renewable first.

  7. First Digital Yuan Electricity Trade

    Finance

    China Southern Power Grid completed its first digital yuan cross-border bilateral electricity transaction through the CBETS platform.

  8. Construction starts on 500-kV line

    Infrastructure

    Work begins on the 177.5-km link spanning Yunnan and northern Laos.

Scenarios

1

China-Laos power line doubles milestone by first anniversary

Likely Resolves by Apr 20, 2027

Discussed by: Chinese state media framing sustained growth; CGTN and Xinhua reports emphasize rising cross-border volumes

Expect cumulative throughput to keep climbing past 1 billion kWh at a steady clip. Flood-season hydropower from Laos plus new Oudomxay solar capacity supply the volume. If nothing disrupts operations, cumulative flow should near or pass 2 billion kWh by the April 2027 anniversary.

2

Market-based trading hits 1.5 billion kWh for 2026

Likely Resolves by Jan 31, 2027

Discussed by: Yidaiyilu and China Daily reporting the 1.5-billion estimate; CSG promoting market participation

The 2026 target of 1.5 billion kWh in market-based transactions rests on sustained solar flows into Yunnan plus the August-to-October hydropower run into the Greater Bay Area. Hitting it depends on demand in southern China and on Laos's ability to deliver during the wet season.

3

Grid model expands to a third Mekong country

Possible Resolves by End of 2027

Discussed by: Yidaiyilu commentary on replicating the model across the Lancang-Mekong region; Lao ambitions as a regional hub

Officials on both sides describe the link as a template for the broader Mekong region. A move to extend the pattern would show up as a new cross-border interconnection agreement with Thailand, Cambodia, or Myanmar, or an MoU on green-power integration. No such deal is public yet.

4

Joint operations committee becomes template for Mekong grid coordination

Possible Resolves by End of 2027

Discussed by: Seetao reporting on the committee's establishment; both sides describing it as institutionalizing cross-border grid management

The committee, established September 22, has set up five working groups and six long-term collaborative mechanisms. If it works, it could be replicated for other Mekong cross-border links, potentially accelerating the stalled ASEAN Power Grid vision.

5

First dry-season reverse flow: Yunnan backstops Laos before April

Likely Resolves by Apr 30, 2027

Discussed by: China Southern Power Grid and Electricite du Laos, which describe the channel as a surplus-and-shortage mechanism and have agreed a dry-season operating plan

The line was built to work both ways. Laos exports surplus hydropower in the rainy season; in the dry months, Chinese power is meant to flow back to cover Lao demand and take pressure off Lao reservoirs. Operations staff from both grids already agreed a dry-season operating plan, so the test is whether reverse flows into Laos are reported before the next wet season starts.

Historical Context

3 moments from history that rhyme with this story — and how they unfolded.

1971–present

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.

Then

Power exports became Laos's largest source of foreign earnings, funding further dam construction.

Now

The 'battery of Southeast Asia' label stuck, but Laos's own grid stayed weak and swung between wet-season glut and dry-season shortage.

Why this matters now

That seasonal imbalance is exactly what the China-Laos line is built to fix — it lets Laos export surplus and import to cover shortfall.

December 2021

China-Laos Railway (2021)

A 1,035-km rail line connecting Kunming, China, to Vientiane, Laos, opened December 3, 2021, as a flagship Belt and Road project. It turned landlocked Laos into a transit link for Southeast Asian freight.

Then

Passenger and freight use climbed after opening, reshaping regional trade routes.

Now

The railway became a template for follow-on regional rail links and a symbol of China-Laos infrastructure cooperation.

Why this matters now

The power line follows the same playbook — flagship cross-border infrastructure under the China-Laos 'shared future' framework, upgrading Laos's role from resource exporter to regional hub.

1997–present

ASEAN Power Grid (1997–present)

ASEAN's Vision 2020 called for a region-wide power grid to interconnect national systems and enable cross-border electricity trade across Southeast Asia. Implementation has stalled, with only bilateral links built.

Then

Most cross-border power in the region still flows over direct bilateral lines.

Now

A true multilateral Southeast Asian power market remains unrealized decades later.

Why this matters now

The Laos-China link operates alongside that stalled vision, and officials present it as a concrete model for standardizing Mekong-region energy trade.

Sources

(14)
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CGTN china.com.cn Xinhua State-owned Assets Supervision and Administration Commission Belt and Road Portal (yidaiyilu.gov.cn) China Daily Laotian Times Seetao EconTransition People's Daily (overseas edition) Yunnan Gateway (Mekong News Network) Xinhua Seetao State-owned Assets Supervision and Administration Commission