
Singapore once led the charge. Now its data center pause reveals the tension. Malaysia races ahead in Johor. Thailand approves billions in projects. Yet the numbers tell a harder story. Power demand from data centers in the region stands set to quadruple from 2.6 gigawatts to 10.7 gigawatts between 2025 and 2035.
Wood Mackenzie laid out that forecast in December 2025. The jump would lift data centers from 1% of peak demand today to 3-4% by 2035. That growth equals seven to 10% of all new electricity consumption across Southeast Asia over the decade. Roughly the same as Singapore’s entire current power use.
But the TechRadar analysis from earlier this year already flagged the risk. Energy constraints sit underestimated while governments chase AI investment and hyperscalers hunt cheap land and lower costs. Joe Ong, ASEAN vice president and general manager at Hitachi Vantara, put it plainly in that TechRadar article. “The artificial intelligence (AI) boom is often framed as a race for compute power, talent and investment. But beneath the surface, a different constraint is emerging; one that is far less visible and harder to scale. Energy.”
Short. Direct. And increasingly accurate.
The International Energy Agency sees Southeast Asia driving a quarter of global energy demand growth by 2035. Data centers already number more than 2,000 across Indonesia, Malaysia, Singapore, Thailand, Vietnam and the Philippines, according to Ember. A standard AI facility can draw as much electricity as 100,000 households. Cooling demands soar in the tropical heat. Grids strain. Water use draws scrutiny.
Malaysia plans to add as much as eight gigawatts of gas-fired power by 2030 to meet data center needs. Its utility, Tenaga Nasional Berhad, has fielded applications for 11,000 megawatts of data center supply. That figure equals nearly 40% of the country’s current total generation capacity. Projections show data center electricity demand there could hit 5,000 megawatts beyond 2035.
The Grid Reality Check
Yet supply timelines lag. Grid congestion grows. Intermittency of renewables clashes with the always-on requirement of AI training runs that can demand hundreds of megawatts without pause. In Indonesia, coal still generates nearly 70% of electricity. Power consumption by data centers there could quadruple by 2030, per Ember’s analysis in its recent ASEAN report.
Singapore learned early. It imposed a moratorium on new data centers years ago. Growth resumed under tighter rules that stress efficiency, low-carbon power and tighter alignment with energy planning. Land remains scarce. The island imports most of its energy. Its data centers already tripled power demand in recent years.
Malaysia and Thailand now position as alternatives. Thailand’s Board of Investment approved $21 billion in data center projects in 2025 alone. Ninety percent concentrate in the Eastern Economic Corridor. Capacity in Bangkok could surge more than 10 times between 2026 and 2030. Jakarta follows with a projected 4.4 times increase.
But the Associated Press reported in March 2026 that several nations now revisit nuclear plans shelved years ago. Malaysia revived its program specifically for data centers. Indonesia, Vietnam and others eye small modular reactors. The reason stays simple. Tech giants demand uptime measured in nines. Solar and wind alone cannot deliver that reliability at the densities AI requires.
“The Iran war has caused the price of oil to increase, raising concern on the reliability of traditional energies,” one data center executive told Fortune in late March. The piece highlighted how conflict in the Middle East adds pressure on fossil fuel supplies already stretched by AI growth.
And the heat makes everything worse. Tropical humidity forces more energy into cooling. Traditional air conditioning systems lose efficiency. Some operators explore liquid cooling or waste heat reuse. Others simply pay higher tariffs. On-grid electricity costs for data centers in the region could quadruple to $10.2 billion annually by 2035, according to Wood Mackenzie.
Local resistance builds in places. Communities question water consumption when reservoirs run low. Regulators in Johor rejected nearly 30% of recent data center applications over efficiency and grid concerns. Vietnam already saw power shortages during peak seasons even before the latest AI wave.
Nuclear Returns to the Table
The nuclear discussion marks a policy pivot. Southeast Asia never operated a commercial nuclear plant. Now five countries pursue programs tied directly to digital infrastructure goals. Power purchase agreements from Microsoft, Amazon and others provide the revenue certainty developers need. The shift reframes energy policy as industrial policy.
Global data center electricity use surged again in 2025 despite some deployment bottlenecks, the IEA noted in recent updates. AI already represents a fast-rising share of workloads. One forecast sees it driving 50% of data center capacity by 2030, up from 25% today.
Operators respond with varied strategies. Some hyperscalers source half their Malaysian power from solar and plan to expand that model. Others push for grid modernization, better interconnectivity across ASEAN and accelerated storage deployment. Yet structural gaps persist. Transmission infrastructure often cannot deliver new generation to the exact sites where data centers cluster.
Recent announcements underscore the momentum. Gorilla Technology revealed plans for a 200-megawatt AI data center campus in Thailand in early May 2026. Chinese firms such as ByteDance and Alibaba shift more AI workloads to Malaysia, drawn by available power and Nvidia hardware access. The regional data center market could exceed $30 billion by 2030.
Still, vacancy rates across Asia tightened last year even as 1.5 gigawatts of capacity came online. Demand outruns supply. Southeast Asian hubs show the fastest projected growth rates through the end of the decade.
The pattern mirrors what the United States and Europe faced earlier, only compressed. Here the baseline grids start weaker in many markets. Urbanization and industrial demand already pull hard. AI adds a new, concentrated load that behaves differently from traditional factories or homes.
Success will hinge on more than raw megawatts. Integration matters. Energy planners must coordinate with data center developers months or years in advance. Efficiency gains from better chips and optimized software help but cannot offset the sheer scale of projected growth. Data quality and governance also shape outcomes. More compute without clean inputs simply amplifies errors at higher cost.
So governments face choices. Accelerate fossil capacity and accept higher emissions. Bet on renewables and storage while managing intermittency risks. Or embrace nuclear for firm, low-carbon baseload. Many appear prepared to pursue all three in parallel.
The underestimated part, as the original TechRadar piece argued, lies in the visibility. Compute announcements make headlines. Power contracts rarely do. Yet the latter determines which ambitions survive contact with physical limits. Those limits now press hard across the region.
Ember projects that between 2% and 30% of national electricity demand could flow to data centers by 2030 in major Southeast Asian markets. The upper end applies to places like Malaysia. A third of ASEAN data centers could run on solar and wind under optimistic scenarios. The gap between hope and delivery remains wide.
Operators who solve the power equation first will capture market share. Those who treat energy as an afterthought risk delays, cost overruns and regulatory blocks. The AI race in Southeast Asia has quietly become an energy race. The winners will measure success not just in racks deployed but in electrons reliably delivered.
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