South-East Asia's $200bn power build hands China the supply chain

South-East Asia's $200bn power build hands China the supply chain A Bain–Standard Chartered report says regional power demand will triple past 100 TWh by 2030, but cancellations and grid gaps mean China captures most of the upside. South-East Asia's power demand from data centres, electric vehicles and green industrial parks will rise by more than 100 terawatt-hours over the next three to four years, a report from Bain & Company and Standard Chartered published on Wednesday (2026-05-20) found, roughly tripling consumption from those sectors.^1,2³ That matters because meeting it requires more than $200bn of investment, with more than half flowing to data centres as operators chase faster grid access.^1,2 The region's green economy is valued at $290bn and projected to reach $430bn by 2030.² The demand is real. The question is who supplies the hardware, and on current evidence that is overwhelmingly China.³ Solar modules, batteries, inverters and the EV supply chain that the region needs are dominated by Chinese manufacturers. A build-out of this scale, financed largely by foreign and regional capital, converts into orders that flow back to Chinese factories.^3,2 But the headline number hides a weaker reality underneath. Only about 60% of the $540bn in announced green investments across power and EV supply chains is considered likely to proceed under current conditions, the report found.² The track record is poor. Across several regional markets, 50% to 60% of renewable projects have been cancelled over the past five years, undone by regulatory uncertainty, permitting bottlenecks and limited grid capacity.² These are the base rate for the region's clean-energy pipeline, not edge cases.² Grid build-out is the binding constraint. A separate analysis flagged that slower grid infrastructure could throttle the demand surge before it materialises, with annual grid investment shortfalls estimated at $18bn by 2035.^7,2 Power demand is set to outpace the wires meant to carry it.⁷ Data centres are the sharpest edge of the demand story. Wood Mackenzie expects South-East Asian data-centre power demand to quadruple from 2.6 GW to 10.7 GW between 2025 and 2035, reaching 3-4% of peak demand by 2035, up from 1% in 2025.⁵ Operators want power now, not after a decade of grid upgrades.² Singapore's cross-border ambitions show both the scale and the friction. The city-state has issued conditional awards to import up to 3.4 GW of firmed solar from Indonesia, a volume that could lift the region's installed solar capacity by more than 70%, according to Mott MacDonald.⁶ Designed around 3.5 GWp of solar PV, these projects remain far from bankable.⁶ The interconnector economics are unforgiving. Mott MacDonald noted that project development costs can exceed $60m, with booking deposits for subsea cables often running 10-20% of cable value and required well before financial close.⁶ Firmed renewables and connecting cables are technically feasible. They are also expensive, slow and exposed to regulatory drift.⁶ Indonesia sits at the centre of this. It is poised for a boom, but inconsistent policymaking could undermine its progress, the Economist argued on Tuesday (2026-05-19).⁴ As both a solar exporter to Singapore and a magnet for industrial investment, Indonesia is where the windfall thesis is tested.^4,6 Watch the conversion rate. If the share of announced green investment deemed likely to proceed climbs above 60%, the build-out is on track.² If cancellations hold at recent rates, the $200bn becomes a ceiling, not a floor, and the only certain beneficiary is the supply chain that already exists.^2,3