Southeast Asia stands at a pivotal moment in its energy investment trajectory. Long characterised by rapid economic growth underpinned by fossil fuels, the region is now entering a decisive phase of transition as clean energy investment rises to meet expanding demand, climate commitments and energy security concerns. According to the World Energy Investment 2025 report, Southeast Asia’s energy sector reflects both the opportunities and structural challenges facing emerging economies attempting to balance development priorities with decarbonisation goals.
Demand growth reshaping the investment landscape
Over the past decade, Southeast Asia has been among the fastest growing economic regions globally, with GDP per capita rising by more than 30 per cent since 2015. This growth has translated directly into energy demand. Total energy demand increased by over 35 per cent during the last 10 years, while electricity demand surged by more than 60 per cent, driven by industrial expansion, urbanisation, rising incomes and increased access to electricity. Approximately 12 per cent of the population gained electricity access during this period, while demand for cooling and appliances rose sharply across urban centres.
Looking ahead, electricity demand is expected to grow faster than overall energy demand over the coming decade. This trend reflects industrial electrification, the expansion of manufacturing value chains and the rapid digitalisation of Southeast Asian economies. Meeting this demand sustainably will require a significant reorientation of energy investment patterns.
From fossil fuel dominance to a more balanced mix
Historically, Southeast Asia’s energy demand growth has been met largely by fossil fuels. Over the past decade, fossil fuels accounted for around 60 per cent of total energy investment. Coal emerged as the dominant fuel, increasing its share in the regional energy mix from 20 per cent to 30 per cent. Since 2015, coal investments have totalled around $110 billion, largely concentrated in Indonesia and Vietnam.
However, the composition of energy investment is beginning to shift. Fossil fuel investment declined from approximately $70 billion in 2015 to around $50 billion in 2025, while clean energy investment rose from $30 billion to $47 billion over the same period. Clean energy now accounts for almost half the total energy investment in Southeast Asia, marking a structural turning point in the region’s development pathway.
This transition is reinforced by national climate commitments. Eight out of 10 Southeast Asian countries have announced carbon neutrality targets. Brunei, Cambodia, Lao PDR, Malaysia, Singapore and Vietnam aim to reach net zero emissions by 2050; Indonesia has set a 2060 target, while Thailand has committed to 2065. These pledges are increasingly influencing policy frameworks, investment priorities and financing structures across the region.
Southeast Asia’s expanding role in clean energy supply chains
Beyond deployment, Southeast Asia is also strengthening its position in global clean energy manufacturing. In 2023, Vietnam, Thailand and Malaysia emerged as the world’s largest solar photovoltaic manufacturers after China, reflecting the region’s growing integration into renewable energy supply chains. This manufacturing base not only supports domestic deployment but also positions Southeast Asia as a critical exporter in the global clean energy transition.
The region’s importance is further amplified by its abundance of critical minerals. Indonesia alone produces over 60 per cent of global nickel supply, a key input for batteries and electric vehicles. Between 2014 and 2023, Indonesia attracted more than $50 billion in greenfield mining investment, representing over 90 per cent of global investment in nickel mining. Chinese investment has played a central role, with $30 billion invested in nickel refining in 2024; Chinese companies accounted for roughly three-quarters of Indonesia’s refining capacity.
The scale of investment needed
Despite recent progress, current investment levels remain insufficient to meet future demand and climate goals. Under the IEA’s Stated Policies Scenario (STEPS), Southeast Asia needs to invest an additional $47 billion annually in clean energy by 2035. Of this, approximately $14 billion per year must be directed towards end-use sectors such as buildings, industry and transport.
Under this pathway, annual fossil fuel investment declines by around $20 billion over the next decade, while investment in renewables, electricity grids, energy storage and end-use sectors doubles. Transport investment alone needs to increase by nearly 200 per cent by 2035, reflecting the scale of electrification required across road transport and logistics networks. These figures highlight the magnitude of capital mobilisation needed and underscore the importance of effective policy frameworks, bankable project pipelines and diversified financing instruments.
Financing structures and the role of commercial capital
Southeast Asia’s energy sector has traditionally relied on domestic commercial lending, and this remains the dominant source of finance. In 2024, domestic finance accounted for around 75 per cent of clean energy investment, rising to approximately 85 per cent in end-use sectors. Commercial finance represents over 75 per cent of clean energy funding overall and exceeds 85 per cent in clean power, clean fuels and battery storage projects.
However, financing patterns vary significantly across subsectors. Grid infrastructure and transmission and distribution investments attract lower commercial participation, with commercial finance accounting for only about 55 per cent. In these areas, domestic public finance plays a critical role, contributing roughly 40 per cent of total investment.
Several factors have supported the growth of commercial financing. Sustainable finance markets have expanded rapidly, supported by initiatives such as the ASEAN Taxonomy for Sustainable Finance. Between 2020 and 2024, sustainable debt issuance in Southeast Asia increased from $17 billion to $60 billion, signalling growing investor appetite for green and transition assets.
Policy reforms have also been instrumental. Feed-in tariff programmes in Viet Nam and Thailand catalysed private sector participation in renewable energy, while corporate clean energy power purchase agreements (PPAs) are gaining traction across the region. Nevertheless, policy inconsistency remains a concern. Retroactive changes to subsidy frameworks in Vietnam, for example, could affect more than $13 billion in solar and wind investment, highlighting persistent bankability risks.
Catalytic capital and blended finance
Given the scale of investment required, domestic commercial finance alone will not be sufficient. International finance, concessional capital and blended finance structures are increasingly necessary to de-risk projects and mobilise private investment. Although development finance institutions (DFIs) have historically played a limited role in Southeast Asia’s clean energy sector, their impact has been highly catalytic where deployed effectively.
A notable example is the 600 MW Monsoon Wind Power project in Lao PDR, which secured a $692 million financing package involving concessional blended finance from DFIs and export credit agencies. This structure mitigated risks such as curtailment and cross-border transmission uncertainty, enabling private capital participation in a complex, first-of-a-kind project.
Such models demonstrate how targeted concessional finance can unlock large-scale private investment and accelerate the deployment of clean energy technologies in emerging markets.
Managing coal dependence and transition risks
Despite growing clean energy investment, coal remains deeply embedded in Southeast Asia’s power sector. Installed coal-fired capacity reached approximately 121 GW in 2025, following two decades of sustained investment. Assuming an average economic lifetime of 25 years, capital yet to be recovered from coal plants amounts to over $130 billion, exposing utilities and investors to significant stranded asset risk as energy transitions accelerate.
At the same time, energy security remains a pressing concern. Under the Announced Pledges Scenario (APS), Southeast Asia faces a growing supply deficit that could result in $140 billion in fossil fuel imports around 2030, increasing exposure to price volatility and geopolitical instability.
Addressing these challenges requires carefully designed transition finance mechanisms. Initiatives such as the Monetary Authority of Singapore-led TRACTION platform are exploring the use of transition credits to support early coal plant retirement. A pilot project in the Philippines aims to accelerate the phase-out of a 246 MW coal plant, demonstrating how innovative financial instruments can help resolve the risk-return dilemma associated with early asset retirement.
Beyond early retirement, additional investment is required to reduce emissions from existing coal assets through repurposing, retrofitting and co-firing, ensuring an orderly and just transition.
The way forward
Southeast Asia’s energy investment outlook reflects a region at a crossroads. Rapid demand growth, rising clean energy investment and expanding manufacturing capabilities offer significant opportunities. Yet structural challenges – including coal dependence, policy uncertainty and financing gaps – continue to constrain progress.
Meeting the region’s energy and climate goals will require sustained policy coherence, deeper capital markets, expanded international cooperation and innovative financing solutions. If these conditions are met, Southeast Asia has the potential not only to meet its own energy needs sustainably but also to play a central role in global clean energy transition.
