Indonesia Power Market Size, Share - Growth Analysis Report and Forecast Trends 2026-2030

Indonesia is the largest archipelagic power market in Southeast Asia, with electricity demand driven by a population of more than 270 million, rapid urbanisation, and a manufacturing base that has expanded steadily over the past decade. Installed generation capacity is on track to exceed 105 GW in 2025 and grow at a CAGR of around 3.5% to surpass 125 GW by 2030. The market sits within a wider Asia Pacific power sector that is itself expanding at a mid-single-digit pace, indicating that Indonesia is broadly tracking regional trends while outpacing many neighbours in absolute capacity additions.

• •Installed capacity forecast at 105.51 GW in 2025, rising to 125.52 GW by 2030
• •Market value estimated at USD 2,103.178 billion in 2026 with 7.8% annual growth
• •Indonesia is the single largest national power market within ASEAN

Demand growth is anchored in population expansion, rising household electrification rates, and the energy needs of energy-intensive industries such as nickel processing, petrochemicals, and data centres. Government infrastructure programmes, including the long-term electricity supply plan (RUPTL), are catalysing investment in new transmission corridors and generation projects. At the same time, the cost-competitiveness of solar PV and the early-stage development of geothermal, wind, and battery storage are unlocking private capital and reshaping the generation mix.

• •Electrification of households, transport, and industrial users is lifting baseline demand
• •Nickel processing, EV battery materials, and data centres are driving incremental load
• •Renewable cost declines and supportive policy are unlocking new project pipelines

The market splits along three main axes: by source (thermal coal and gas, hydro, geothermal, and emerging solar/wind), by grid segment (state-owned Java-Bali grid, outer-island systems, and industrial captive/off-grid), and by end user (residential, commercial, and industrial). Java remains the dominant demand centre, but generation build-out is increasingly concentrated in Sumatra, Kalimantan, and Sulawesi, where resource endowments and industrial clusters are located. Geothermal resources are concentrated in Java and Sumatra, while large-scale solar potential is concentrated in eastern Indonesia.

• •Coal and gas still account for the majority of generation, but share is gradually declining
• •Java-Bali grid is the single largest demand pocket; outer islands are the fastest-growing
• •Industrial offtakers, including mining and smelting, are reshaping regional load profiles

Who are the notable companies in the industry?

The market is partially consolidated at the transmission and distribution level, where a single state-owned utility acts as the sole off-taker for most independent power producers, but is more fragmented on the generation side, with a mix of integrated state-owned generators, independent power producers, and industrial captive operators. Generation supply is technologically heterogeneous, spanning coal- and gas-fired steam, combined-cycle gas turbines, open-cycle gas turbines, run-of-river and reservoir hydro, geothermal flash and binary plants, utility-scale solar PV, and increasingly battery energy storage systems. Capacity is geographically concentrated on Java, but new additions are dispersing to resource-rich outer islands, gradually shifting the centre of gravity of the generation fleet.

• •Single-buyer model anchors generation competition around long-term power purchase agreements
• •Generation mix spans thermal, hydro, geothermal, and increasingly solar and storage
• •New capacity additions are shifting away from Java toward Sumatra, Kalimantan, and eastern regions

What are the recent trends and outlook?

The medium-term trajectory points to a gradual reweighting of the generation mix toward renewables, supported by a stated national ambition to peak power-sector emissions and to reach high renewable shares by the mid-2030s. Battery storage is expected to play a growing role in managing solar intermittency and stabilising outer-island grids, while grid digitalization and demand-side management programmes are being piloted to defer capacity additions. The IEA's World Energy Outlook 2025 highlights that Asian emerging markets, including Indonesia, will account for a disproportionate share of global power-demand growth, reinforcing the case for sustained capacity build-out through 2030 and beyond.

• •Coal's share of generation is expected to decline as renewables scale up
• •Battery storage and grid digitalization are emerging as critical enablers of variable renewable integration
• •Asia Pacific as a whole is projected to lead global power-demand growth into the 2030s