Southeast Asia's Green Rush Enriches the One Supplier It Can't Replace
China controls over 70% of global production of the raw materials, solar cells and modules that Southeast Asia needs for its green transition — a structural reality that a $200 billion regional investment surge is about to make more visible, not less.3
A May 2026 report by Bain & Company and Standard Chartered found that power demand from data centres, electric vehicles and green industrial parks across Southeast Asia is forecast to grow by more than 100 terawatt-hours over the next three to four years. The investment required to meet that demand — $200 billion-plus, with more than half directed at data centres — will run disproportionately toward suppliers capable of delivering solar panels, battery systems and grid components at the speed and volume the region requires. China is the only country that can.1,2
The arithmetic is straightforward. Southeast Asia's green economy, currently valued at $290 billion, is projected to expand to $430 billion by 2030, according to the same report. That trajectory requires a procurement cycle that bypasses Beijing only with difficulty. In a survey of policymakers, business leaders and regional officials published in 2026, 77% of respondents named China as the most influential economic power in Southeast Asia — a finding that reflects supply-chain reality as much as geopolitical alignment.2,3
The region's grid constraints compound the dependency. Data centre power demand across Southeast Asia is set to quadruple from 2.6 gigawatts to 10.7 gigawatts between 2025 and 2035, reaching 3-4% of peak demand by 2035, Wood Mackenzie research found. Yet grid infrastructure buildout is lagging well behind those projections. Renewable energy projects in Vietnam, Thailand and Indonesia have faced a 50-60% cancellation rate over the past five years, driven by regulatory delays, permitting failures and limited grid capacity, the Bain and Standard Chartered analysis noted.4,2
The gap between announced capacity and deliverable capacity is where China gains further ground. Of the $540 billion in announced green investments across power and electric vehicle supply chains in Southeast Asia, only around 60% is considered likely to proceed under current conditions. The projects most likely to survive are those with reliable equipment supply, faster permitting pathways and offtake certainty — criteria that tilt toward Chinese manufacturers with established regional relationships and the ability to finance components at scale.2
EV adoption is accelerating in Thailand, Vietnam and Indonesia, but the supporting power infrastructure remains thin. Thailand, which has moved most aggressively toward EV manufacturing as a hedge against its oil-dependent industrial base, faces the same grid bottlenecks constraining every other market in the region. The scramble for capacity runs directly into Chinese dominance of battery and charging-system supply chains.5
Gavekal Dragonomics analyst Dan Wang has argued that China's lead in solar technology is likely to be irreversible, a judgment that applies with similar force to solar-adjacent supply chains including inverters, trackers and storage systems. The region's ambition to reduce dependence on fossil fuel imports is producing a different dependency — one measured in procurement orders placed with Shenzhen and Guangdong rather than cargoes lifted at Ras Tanura.3
The irony is structural. Southeast Asian governments and their corporate anchor tenants are spending heavily on digital infrastructure and clean energy precisely to reduce geopolitical exposure — data sovereignty from US hyperscalers, energy sovereignty from Gulf oil. The outcome, given current supply-chain geography, is that both transitions channel capital toward the one regional power whose influence 77% of the region's policymakers already acknowledge as dominant.3,2
What to watch is the pace at which grid bottlenecks resolve. The $200 billion investment target assumes a grid build that has repeatedly underdelivered. Vietnam, which sits at the centre of the data-centre investment wave given its competitive labour costs and existing manufacturing base, has seen some of the sharpest project cancellation rates in the region. If regulatory reform in Vietnam and Thailand accelerates grid connection timelines, the pace of procurement from Chinese suppliers accelerates with it. If it stalls, data centre operators will look to on-site generation — solar plus storage — which leads to the same procurement conclusion through a different route. Either way, China's position in the supply chain does not diminish.