Summary
The Development Of ASEAN Power Grid And The Iran War – Analysis
The Iran War (Third Gulf War), which began on 28 February 2026, has impacted on the development of the ASEAN Power Grid (APG) by transforming it from a long-term aspiration into an urgent energy security priority (SCMP, 28 March 2026). Paradoxically, while the conflict has caused immediate economic strain, it has also provided the political momentum needed to accelerate regional energy integration (SCMP,12 April 2026).
The resulting blockades in the Straits of Hormuz have had direct, damaging effects on Southeast Asian economies. Over 50 percent of ASEAN’s crude oil and significant amounts of its natural gas typically transit the Strait of Hormuz. In addition, damage to regional facilities and shipping standstills has caused spot LNG prices to more than double.
ASEAN member states heavily reliant on Middle Eastern imports, such as the Philippines (which sources 90 percent of its oil from the region), declared national energy emergencies. Several countries, including Cambodia, Laos, Myanmar, and Thailand, have experienced temporary fuel shortages and rationing. Overall, the surge in energy costs has driven up operational and freight expenses across the board, weakening local currencies and straining government budgets.
The high energy prices and weakening regional currencies (such as the Thai Baht and Indonesian Rupiah) have strained national budgets, potentially slowing the capital-intensive construction of subsea cables and transmission lines by creating investment “bottlenecks.”
The energy shock that is marked by oil prices surging past US$100 a barrel, has forced member states to reconsider cross-border electricity trade as a hedge against maritime chokepoints like the Strait of Hormuz. The conflict has created a severe energy crisis due to high dependence on Middle Eastern oil and liquefied natural gas (LNG), forcing Southeast Asian nations to re-evaluate their energy security and accelerate long-term infrastructure projects (Norton Rose Fulbright, March 2026).
The Iran War has intensified the urgent need for a connected energy grid, pushing the ASEAN Power Grid (APG) back into focus as a crucial long-term energy security strategy. It has strengthened the argument for creating a regional, self-sufficient, and diversified energy system. Table 1 shows regional energy vulnerabilities among some ASEAN countries due to oil dependency from Middle Eastern suppliers.
Table 1: Regional Energy Vulnerabilities in ASEAN (2026)
Regional Responses Among ASEAN Members
The Philippines has declared a national energy emergency. The government rolled out a $300 million fund to enhance fuel security, advocated for regional oil-sharing, and instituted a four-day workweek.
Indonesia absorbed the initial shock by pledging to maintain domestic fuel subsidies, while also initiating fuel rationing for private motorists and mandating civil servants work from home one day a week. Indonesia is actively looking to accelerate its energy transition to mitigate vulnerability to import shocks, focusing on strengthening the grid to absorb more renewables.
However, the Iran War has caused short-term fossil fuel regression. For example, Thailand had activated its Energy Emergency Surveillance Centre to manage reserves, temporarily capped diesel prices, and temporarily reactivated idle coal plants. To prevent blackouts, Vietnam have also temporarily reactivated coal plants, which may divert immediate attention away from the renewable-heavy integration the APG was designed for (ASEAN Energy Centre website).
Vietnam also implemented targeted temporary tax reductions to 0%, suspended crude exports, and urged businesses to encourage remote work to reduce fuel consumption.
Malaysia reduced monthly subsidized fuel quotas for private vehicles and rolled out remote-work directives for civil servants. In Laos, the school week was reduced from five days to three to help families cope with volatile fuel costs (Fulcrum 12 May 2026).
While acting as a highly resilient energy hub, Singapore, the city-state has faced downstream pressures and is drawing down strategic reserves, as a heavy importer of LNG, Singapore is pushing forward with regional power grid projects to diversify its energy supply. In this context, Singapore has increasingly imported increasing volumes of Russian oil. Approximately, 1.26 million tonnes of Russian crude arrived in Singapore in April 2026. In February 2026, shipments from Russian were 160,155 barrels per day (bpd) and this increased to 272,565 bpd in April 2026 (Straits Times, 26 May 2026).
The 2026 ASEAN Summit held in the Philippine cities of Cebu and Manila is scheduled to focus on the war’s impact on energy, emphasizing the acceleration of regional power grid plans and renewable adoption (ASEAN 2026 Website).
Key Impacts on APG Development
The ASEAN Power Grid (APG) is driven by the need to meet surging power demand from rapid industrialization and data centres, achieve long-term energy security, and unlock cost-effective renewable energy across Southeast Asia
There has been a shift in strategic focus because the APG is no longer viewed solely as a “green” decarbonisation project; it is now being recast as a critical tool for hard energy security to reduce the region’s 56 percent reliance on Middle Eastern crude oil.
The Iran war has accelerated the push toward renewable energy, as fossil fuel reliance has become economically and security-wise precarious. The APG serves as a vital component for integrating this new renewable capacity into the regional grid. While driving long-term renewable goals, the immediate impact has been a fallback to coal to keep power prices from soaring, which may create a short-term, paradoxical obstacle to rapid decarbonisation, even as regional grid plans are revived.
While the need for the grid is clearer, the financial strain from the energy crisis has resulted in higher import costs, rising subsidies, and currency depreciation, that may make funding massive, capital-intensive infrastructure projects like the APG more challenging in the immediate term (Forbes, 17 May 2026).
However, development of the APG is hindered by regulatory fragmentation, massive financing deficits, political distrust, and complex technical hurdles. While regional goals aim for a unified, multilateral trading network, the transition requires aligning diverse national infrastructures and overcoming deep-seated institutional barriers.
Political and Institutional Hurdles
The absence of a central, overarching entity with the mandate to set or enforce specific market rules, has resulted in a lack of regional coordination and enforcement authority for the APG. Final decisions regarding transmission rules, pricing, and dispute resolution remain with individual national governments.
Policy continuity is lacking undermining cross-border infrastructure development which takes over a decade to complete. This is due to frequent changes in domestic energy policies and political leadership that could shelve long-term projects.
Regional trust in the APG development has been eroded because some member states fear that relying on neighbouring countries for energy bears security risks. In addition, geopolitical disputes or domestic tariff disagreements can foster hesitation to depend entirely on regional exports (Business Times, 21 May 2026).
Market and Regulatory Incompatibilities
Individual ASEAN member states operate with different technical standards, grid codes, energy policies, and pricing mechanisms resulting in divergent power grid structures. Harmonizing these requires extensive regulatory restructuring which takes time.
In addition, member countries often prioritize local or internal interconnections over regional cross-border ones to secure their own populations first. In addition, the absence of open-access regimes and independent system operators across all borders prevents the seamless multilateral trading of electricity (EU-ASEAN Business Council, October 2025).
Financial and Economic Barriers
Realizing the full vision of the APG will require billions in capital. The International Energy Agency (IEA) highlights the need for roughly USD $27 billion to build the necessary interconnectors over a 15-year span, vastly outpacing historical investment. Private financiers are hesitant to back large early-stage projects due to unclear ownership structures, regulatory uncertainty, and a lack of guaranteed power purchase agreements (Petromindo, 12 March 2026).
Technical and Infrastructure Challenges
Many future interconnections rely on subsea cables crossing deep waters. This technology is extremely expensive and requires specialized expertise and installation. In addition, integrating different renewable energy sources requires advanced grid intelligence. Member ASEAN states with high shares of variable renewables (like Vietnam and Thailand) struggle with transmission congestion, forecast errors, and low system inertia (ASEAN Centre for Energy Website).
Balancing seasonal surpluses and shortages across different nations (e.g., hydropower dependencies in Lao PDR vs. high demands elsewhere) poses a constant threat to baseline power stability without wide-area predictive monitoring systems.
Proactive Strategic Shifts
The Iran war has exposed the structural fragility of Southeast Asia’s reliance on imported fossil fuels, making the ASEAN Power Grid more politically relevant than at any point in its 20-year history. For example, a nuclear momentum is emerging because the Iran War is accelerating interest in civilian nuclear energy as a stable, domestically controlled baseload power source to feed into the regional grid. As the 2026 ASEAN Chair, the Philippines is being urged to use its position to transition the APG “from vision to voltage” to protect against future geopolitical shocks (SCMP, 28h March 2026).
Collectively, the Association of Southeast Asian Nations (ASEAN) has been forced to rethink its energy playbook. At regional summits, member states discussed activating emergency fuel coordination under the ASEAN Petroleum Security Agreement (APSA). Furthermore, the supply shock has spurred long-term strategic shifts, with countries like Vietnam and the Philippines actively accelerating renewable energy transitions and fast-tracking studies into civilian nuclear power (CNA 14 March 2026). Singapore’s role as ASEAN Chair in 2027, will likely continue to drive the need for the APG to increase ASEAN’s energy resilience and reduce the adverse impact of uncertainty of energy supplies.
In summary, the war acts as a double-edged sword as it creates short-term financial pressure that could slow infrastructure projects, but also highlights the fatal flaw of energy dependence, making the long-term, faster development of the ASEAN Power Grid a top security priority.