IEA: Southeast Asia grid investment must nearly quadruple to $50 billion by 2050
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The International Energy Agency projects Southeast Asia's grid and storage investment must rise from $13 billion today to $50 billion by 2050 to meet announced pledges. Transmission and distribution networks need to more than double in length by 2050 to keep pace with demand and renewable variability. The region is set to account for almost 20% of global energy demand growth to 2035 under current policies.
Key Facts
- Southeast Asia's renewable energy capacity stood at 120 GW in 2024 and is expected to almost triple by 2035 under current policies.
- Grid and storage investment must increase from $13 billion today to $50 billion in 2050 to meet announced pledges.
- Eight countries in Southeast Asia have introduced economy-wide net zero targets.
- Renewable energy and electrification investment saved the region roughly $30 billion in fossil fuel import costs in 2025.
- Electricity access across Asia rose from about 70% in 2000 to over 97% in 2021, while grid losses remained around 12% in 2022.
Grid Investment Gap
The IEA says transmission and distribution networks in Southeast Asia need to more than double in length by 2050 to keep pace with rising demand and growing variability of supply and demand. Investment in grids and storage must rise from $13 billion today to $50 billion in 2050 to meet announced pledges. An estimated $27 billion is needed for cross-border interconnections under the ASEAN Power Grid. The Asian Development Bank has identified the lack of investment in transmission networks as a major barrier to Asia's energy transition.
Demand and Infrastructure Strain
Southeast Asia accounts for 9% of the world's population and 4% of its GDP, but is set to account for almost 20% of global energy demand growth to 2035 under current policy settings. Across Asia, energy consumption rose by around 50% over the past decade, while investment in energy infrastructure remained broadly stagnant. A recent assessment suggests that overloaded transmission lines, undersized transformers, ageing equipment, weak maintenance, and inadequate network planning can increase technical losses, constrain power flows, and delay the connection of new renewable projects. Grid losses remained around 12% in 2022, only slightly lower than the 14% recorded in 2000.
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IEA: Southeast Asia grid investment must nearly quadruple to $50 billion by 2050
