Electricity demand in Southeast Asia is expected to grow by an average of 5.4% annually between 2026 and 2030, according to the International Energy Agency's ASEAN Energy Security Review, published on October 6, 2026.
The IEA identifies industrial expansion, air conditioning, data centres and electrification as major drivers. Regional electricity demand has already grown by approximately 6% annually since 2015.
Indonesia is expected to account for around 40% of additional electricity demand across ASEAN member states through 2030, followed by Vietnam at 26%.
Renewable generation is also expanding. Southeast Asia's installed solar capacity reached nearly 38 GW in 2025, more than fifteen times its level a decade earlier.
However, transmission and distribution networks have not kept pace with electricity demand and renewable development in several countries.
The IEA estimates that annual investment in regional grids and storage will need to rise from approximately USD 13 billion today to USD 30 billion by 2035.
The report identifies ageing networks, congestion and extreme weather as risks to electricity supply. Around one-fifth of Southeast Asia's grids are exposed to tropical cyclone risk.
For industrial facilities, hospitals and data centres, these conditions make local power quality and backup requirements important considerations when planning electrical installations.
Equipment such as low frequency UPS systems can provide backup power for suitable critical loads, although the IEA's electricity demand figures do not represent a forecast for UPS sales.
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