ASEAN Power Grid Depends on Shared Benefits, Clear Rules and Financing

A regional electricity network needs more than cables

More than 38,000 gigawatt hours of electricity crossed ASEAN borders between 2016 and 2022, according to the International Energy Agency. The next challenge is turning that experience into a regional network that countries are willing to join and investors are willing to finance. ASEAN and its partners estimate that hundreds of billions of United States dollars will be needed for generation and transmission to achieve a fully integrated grid by 2045.

The ASEAN Power Grid, launched in 1999, aims to move electricity across Southeast Asia to where it is needed at the lowest cost. As of November 7, 2025, the central questions are how countries will share the benefits, who will pay for the infrastructure and what rules will protect those taking the risks.

Regional outlooks project that electricity could account for as much as 45 percent of total final energy use by 2050. Final energy means the energy used by consumers, including households and businesses. Renewable sources could supply more than 70 percent of power generation by then, compared with less than 30 percent today. Those projections make reliable connections between national systems an important part of meeting demand while cutting emissions.

The Laos Thailand Malaysia Singapore Power Integration Project has already demonstrated that electricity can be traded through several countries. Yet progress remains uneven. Some projects bring clear gains to countries hosting dams, solar parks or transmission infrastructure. Others require countries along a transmission route to accept social and environmental costs with little benefit. A shared framework must explain who gains, who pays and how risks are managed before projects advance.

What participating countries stand to gain

Mainland Southeast Asia holds much of the region's hydropower, while areas rich in solar and wind resources can be far from major centres of electricity demand. Connecting those resources to a wider market would let countries trade power and smooth variations in wind and sunshine. It could also reduce the need for expensive reserve plants kept ready to cover supply shortages.

Importing countries can gain cleaner electricity and more stable prices when gas or coal markets become volatile. Exporting countries can gain dependable demand, making new projects easier to finance. Countries that electricity passes through can earn transit revenue, while those providing reserves or services that keep voltage and frequency stable can receive service fees.

A joint study by researchers in the United States and Singapore estimated that the grid could support about US$2 billion in research and development activity each year and create as many as 9,000 jobs annually. Most of those jobs would be in manufacturing for renewable energy. The estimates give governments another reason to consider benefits beyond the price of electricity alone.

The United Nations Economic and Social Commission for Asia and the Pacific promotes a broader assessment that includes air quality, health, employment, and social and environmental outcomes. Its approach connects power planning with the Sustainable Development Goals through tools such as life cycle assessments and frameworks for community engagement. A life cycle assessment examines impacts over a project's life, helping planners compare options rather than focus only on initial costs.

Financing the transition to a connected grid

The ASEAN Power Grid Financing Initiative aims to address the investment gap by developing a pipeline of projects that lenders can finance, standardising data and opening access to climate finance. ASEAN institutions lead the initiative, with coordination by international development banks. The World Bank's financing initiative overview sets out its aims and programme structure.

Many utilities in Southeast Asia are vertically integrated, meaning they combine activities such as generating, transmitting and supplying electricity. Their balance sheets limit how much new investment they can take on. Private capital and financing arrangements that share risk therefore have a larger role to play.

Blended finance combines funding with different expectations about risk and returns. Concessional capital, which accepts lower returns, can sit alongside commercial funding and absorb early losses or construction risk. Public private partnerships can also divide responsibilities and costs between governments and businesses.

Guarantees from development partners can cover risks such as currency movements or a buyer failing to pay. That protection can make contracts lasting many years more workable. When risks become easier to manage, the combined cost of borrowing and investor funding can fall, reducing project tariffs and helping more connections win investment approval.

The International Energy Agency finds that the cost of capital for clean energy in Southeast Asia remains higher than in advanced economies. Singapore can help through financial expertise, catalytic funding and bringing investors together. Regulatory certainty matters alongside those financial tools: transparent transmission revenue, credible access rules and dependable settlement arrangements make a project easier to finance.

Who sets the rules for regional power trade?

ASEAN has no single regional electricity regulator, and coordination is spread across several committees. Physical connections therefore need a matching system of rules for planning, operations and payments. Without predictable arrangements, utilities and investors face uncertainty about how a connection will be used and how its costs will be recovered.

A stronger central function, such as a dedicated ASEAN Power Grid Secretariat, could provide continuity, publish standards and help keep projects on schedule. It could work with the ASEAN Centre for Energy and the Heads of ASEAN Power Utilities and Authorities. The centre's ASEAN Power Grid programme describes the regional effort.

Countries can build trust by agreeing on wheeling charges, the fees paid to move electricity through another country's network, and on grid codes, the technical rules for connecting and operating equipment. They can also publish methods for calculating available transfer capacity and hold regular auctions for rights to use connections between countries.

System operators need compatible procedures for outages and congestion, when demand to use a line exceeds what it can safely carry. Commercial rules should cover payment settlement, electricity lost during transmission and ancillary services, the support needed to keep a power system stable. Publishing and enforcing these terms can reduce disputes and speed investment, as experience in other connected markets shows.

Industry leaders have proposed new coordination bodies and called for financial leadership from regional hubs to keep projects moving through uncertainty. A gradual approach would connect countries within subregions first, then expand into a wider network. The aim is to turn individual deals into a coherent programme that investors can understand.

Making renewable electricity claims trustworthy

Renewable energy certificates, or RECs, record that a megawatt hour of electricity came from a renewable source. Companies use them to claim renewable electricity use in their sustainability reports. Trading these certificates across Southeast Asian borders is difficult because national rules vary and the same renewable generation could be counted more than once.

Singapore is developing a framework with the International Tracking Standard Foundation to give buyers confidence that their claims are exclusive when electricity crosses borders. Exclusive ownership means the renewable attribute attached to a unit of generation belongs to one buyer, addressing the risk of double counting.

A credible certificate system can attract corporate buyers that want renewable electricity where they operate but cannot secure power contracts lasting many years. Certificate sales can provide an extra revenue stream for renewable projects, alongside electricity sales and payments for grid services.

Clear certificate rules can reduce policy uncertainty, standardise trade and give investors a stronger signal that demand for clean electricity exists. Regulation, power contracts and investment in the physical network remain central to making that trade work.

Building a backbone in stages

The regional network will need major transmission corridors, but it does not have to be built all at once. A backbone approach would create a main route that countries can connect to when ready, while smaller bilateral lines continue serving local needs. This can lower costs in the near term and speed progress while keeping open the possibility of a fully integrated network later.

The Laos Thailand Malaysia Singapore Power Integration Project already uses existing interconnectors for trade involving several countries. The Brunei Indonesia Malaysia Philippines initiative is working to add further links. These efforts provide practical starting points for a larger network.

Sarawak in Malaysia and Singapore plan a subsea cable linked to an agreement to export one gigawatt of power. Construction is expected to start later this decade, with operations planned around 2032. Sarawak aims to reach about 10,000 megawatts of generation capacity by 2030, mostly hydropower. One gigawatt equals 1,000 megawatts, making the planned export capacity equivalent to one tenth of that generation target.

Sarawak already supplies electricity to Indonesia's Kalimantan region and plans to serve Sabah and possibly Brunei. The timetable for regional integration includes both achievements and targets:

• 1999: The ASEAN Power Grid was launched.
• 2016 to 2022: More than 38,000 gigawatt hours were traded across ASEAN borders.
• Later this decade: Construction is planned to begin on the Sarawak to Singapore subsea cable.
• 2030: Sarawak aims for about 10,000 megawatts of generation capacity.
• Around 2032: The Sarawak to Singapore connection is planned to begin operating.
• 2045: ASEAN and its partners target a fully integrated grid.
• 2050: Regional outlooks project a much larger role for electricity and renewable generation.

The cable schedule remains a plan, with operations expected around 2032 rather than on a specified opening date. Its development is part of the staged approach to expanding regional trade.

Digital upgrades are part of the infrastructure

Research groups estimate that ASEAN will need up to US$10.7 billion in smart grid investment to manage rising electricity demand and integrate more solar and wind power. Smart grids use sensors, automation and control software to monitor conditions and respond to changes in supply and demand.

These upgrades can help avoid curtailment, when generators must reduce output because the network cannot accept or carry all the electricity available. They can also reduce how often outages occur and shorten service interruptions.

Reliability data from recent years show improvements across the region, although performance still varies by country. Continued spending on flexible systems and modern controls can help the network accept more renewable capacity at lower cost. Digital equipment is therefore part of the same investment challenge as cables and transmission corridors.

What makes a project ready for lenders?

Investors begin with cash flow and risk allocation: how a project earns money, whether buyers will pay and who bears the cost when something goes wrong. Power contracts lasting many years, dependable buyers, payment security and transparent tariff setting are central to making a project bankable, meaning suitable for financing.

Transmission projects can use revenue arrangements that pay for availability and performance. Clear indexation rules explain how payments change over time. A regional project preparation facility could help governments complete feasibility studies, address land requirements, secure permits and carry out environmental and social work. Those steps can reduce delays that weaken investment returns.

The ASEAN Power Grid Financing Initiative points to a regional database of planned projects and technical standards, alongside standard contracts for interconnection and electricity sales. Common information and contract terms would give governments and lenders a more consistent starting point for assessing proposals.

Public private partnerships can be supported by guarantees, insurance and funding in local currencies where appropriate. Credit enhancements, protections that make lenders more confident about repayment, should match the specific risks in each market. A dedicated transmission investment facility, funded by public and private sources, could absorb risk at the early stages and attract commercial lenders.

Early trade shows how cooperation can grow

Electricity trading between Laos and Thailand helped establish the bilateral connections that later supported flows into Malaysia and Singapore. The more than 38,000 gigawatt hours traded across ASEAN borders between 2016 and 2022 provide practical experience for expanding cooperation. The approach is to begin with modest volumes, operate reliably, demonstrate savings and then increase trade.

Countries can strengthen trust by publishing operating limits in advance, explaining how transmission capacity is allocated and applying rules consistently to market participants. Agreed procedures for curtailment and emergency support would make responsibilities clearer when the system comes under pressure.

Regular ministerial meetings involving energy, finance and economic portfolios can keep technical work aligned with political commitments. That coordination matters because a transmission project combines engineering decisions, public policy and financing arrangements, rather than belonging to just one ministry or utility.

Managing security, technical and community risks

Governments face concerns about sovereignty, political risk and depending too heavily on neighbouring countries. Contracts can address those concerns through clear rights to reduce exports during emergencies, agreed compensation and defined conditions for leaving agreements that last many years. Shared reserves and several transmission routes can reduce exposure to a single line or supplier.

Insurance and guarantees can support those contractual protections. Countries considering participation can then assess both the benefits of trade and the arrangements available when supplies are disrupted.

Growing shares of wind and solar also require technical measures to keep the system stable. Batteries, fast frequency response and demand response can help balance supply and use. Demand response adjusts electricity consumption when the system needs support. Grid forming inverters and modern controls can provide the stabilising functions needed to keep voltage and frequency within limits.

Training, testing and laboratories across ASEAN can build the skills to operate a more complex network. Those investments also connect with the research and manufacturing opportunities identified in the United States Singapore study.

Communities and the environment need attention during planning, construction and operation. Life cycle assessments can compare emissions and other impacts over time. Environmental impact assessments and early engagement with affected communities can reduce delays and strengthen public acceptance of projects.

The Green Power Corridor framework promoted by the United Nations Economic and Social Commission for Asia and the Pacific provides measures that align energy connections with the Sustainable Development Goals. Combining those measures with workable financing and clear operating rules can support cleaner air, more reliable access to electricity, new industry and jobs.

Key Points

• The ASEAN Power Grid began in 1999, with a fully integrated network targeted for 2045.
• More than 38,000 gigawatt hours crossed ASEAN borders between 2016 and 2022.
• Regional outlooks project electricity could reach 45 percent of final energy use and renewables could exceed 70 percent of power generation by 2050.
• Generation and transmission will require hundreds of billions of United States dollars, making shared benefits and credible financing central to progress.
• A United States Singapore study estimates about US$2 billion in annual research and development activity and up to 9,000 jobs a year.
• Common trading rules, payment protection and exclusive renewable certificate claims can support investment.
• Sarawak plans a connection exporting one gigawatt to Singapore, with operations expected around 2032.
• ASEAN may need up to US$10.7 billion in smart grid investment, alongside physical transmission infrastructure.
• Emergency arrangements, technical stability and community engagement are essential parts of regional cooperation.