What Renewable Energy Sources Have the Highest Potential in Indonesia?

Renewable energy sources represent Indonesia’s pathway toward energy independence and emission reduction while maintaining the industrial growth that drives economic development. The country’s geographic position, abundant natural resources, and growing infrastructure investment create multiple renewable generation pathways with different characteristics in terms of availability, reliability, scalability, and integration with the electricity grid. Understanding which renewable energy sources offer the highest potential helps investors, policymakers, and manufacturers evaluate energy strategies that support long-term operational resilience and decarbonization goals.

Indonesia’s Renewable Energy Landscape: From Geothermal to Solar Power

Indonesia has significant renewable energy potential across geothermal, solar, hydropower, bioenergy, wind, and other resources. Among these, geothermal is particularly important for its potential to provide stable, dispatchable electricity, while solar power offers scalable generation that can be deployed across rooftops, industrial facilities, and utility-scale projects.

Indonesia’s geothermal potential is estimated at approximately 23.2 GW, although only around 2.8 GW of capacity was installed as of 2026, highlighting the significant development opportunity that remains. The government continues to promote geothermal development as part of Indonesia’s energy transition and energy security strategy.

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Geothermal Energy Potential Across Indonesian Volcanic Arcs

Indonesia’s geothermal resources are concentrated across geologically active regions, particularly along the volcanic belts of Sumatra, Java, Sulawesi, Bali-Nusa Tenggara, and other parts of the country. Geothermal power is valuable for electricity systems because it can provide relatively stable generation that is less dependent on daily weather conditions than solar or wind power.

However, geothermal development is highly site-specific and requires significant exploration, drilling, capital investment, and long development timelines. The cost and technical requirements vary depending on reservoir characteristics, plant technology, and project location. These characteristics make geothermal an important part of Indonesia’s national renewable energy portfolio, but not necessarily a direct energy source for every industrial parks.

1. Equatorial Positioning and Year-Round Solar Potential

Indonesia’s location near the equator provides strong solar resources throughout the year, with average solar radiation generally around 4.8 kWh per square meter per day, although conditions vary between regions.

This resource creates opportunities for photovoltaic installations across residential, commercial, and industrial applications. For industrial facilities, solar power can complement grid electricity by generating electricity during daylight hours, when many manufacturing and commercial activities are operating.

Rooftop Solar for Industrial Facilities

Industrial and commercial buildings across Indonesia can deploy rooftop photovoltaic systems to utilize available roof space and offset electricity consumption. Facilities with suitable roof structures can evaluate rooftop solar based on available area, structural capacity, electricity demand profiles, grid conditions, applicable regulations, and project economics.

Rather than relying on a fixed percentage of roof coverage or a universal return-on-investment period, each rooftop solar project should be assessed according to its site-specific conditions and electricity consumption profile.

Indonesia’s rooftop solar framework is governed by Minister of Energy and Mineral Resources Regulation No. 2 of 2024, which introduced changes to the application, capacity allocation, and treatment of excess electricity generated by rooftop solar systems. Under the current framework, excess electricity supplied to the grid is not counted toward the customer’s electricity bill.

Utility-Scale Solar Farms

Large-scale solar farms provide another pathway for expanding renewable electricity generation. Indonesia has already demonstrated the potential of utility-scale solar through projects such as the 192 MWp Cirata Floating Solar PV project in West Java.

The Cirata project, developed through collaboration between PLN Nusantara Power and Masdar, supplies clean electricity to the Java-Bali electricity system and demonstrates how large-scale solar can be integrated into Indonesia’s broader power infrastructure.

The growing development of utility-scale solar is also reflected in Indonesia’s electricity planning. Under the 2025–2034 RUPTL, solar power accounts for 17.1 GW of planned additional capacity, making it the largest renewable generation addition in the plan.

2. Grid Integration and Energy Storage

As renewable generation expands, grid integration becomes increasingly important. Solar generation varies according to sunlight availability and therefore needs to operate alongside grid infrastructure, flexible generation, energy storage, and effective electricity management systems.

(BESS) can store electricity generated during periods of high renewable production and release it when needed. The role of storage is becoming increasingly relevant in Indonesia’s electricity planning, with the 2025–2034 RUPTL including 4.3 GW of BESS alongside 6 GW of pumped-storage capacity.

For industrial users, however, energy storage is only one component of a broader energy strategy. Power reliability can also be supported through grid infrastructure, appropriate electrical system configuration, demand management, energy efficiency, and on-site renewable generation.

3. Regional Deployment and Supply Chain Development

The expansion of renewable energy is also creating opportunities across Indonesia’s energy technology and industrial supply chains. Solar projects, in particular, require a range of components, engineering services, installation capabilities, operations, maintenance, and supporting infrastructure.

For manufacturers and industrial investors, the availability of renewable energy can increasingly become part of broader environmental, social, and governance (ESG) strategies and corporate decarbonization programs, particularly for companies serving international supply chains with increasingly ambitious emissions targets.

Commercial and Industrial Sector Adoption

Companies operating warehouses, food processing facilities, manufacturing plants, and other commercial properties are increasingly evaluating renewable energy as part of their long-term energy strategies.

Solar power can be deployed through on-site systems, utility-scale projects, or other procurement arrangements, depending on regulatory requirements and project structure. For industrial users, the value of renewable energy extends beyond electricity generation, supporting energy diversification, emissions reduction, and progress toward corporate sustainability targets.

Rural Electrification and Off-Grid Applications

Renewable energy can also support remote and off-grid applications where connection to centralized electricity infrastructure may be challenging or uneconomical. Solar PV combined with battery storage can provide electricity for isolated communities and facilities, while hybrid systems can incorporate other generation sources where appropriate.

The suitability and economics of these systems depend heavily on local conditions, including electricity demand, resource availability, logistics, existing infrastructure, and the cost of alternative energy sources.

Read also: What Types of Electricity Systems Are Used in Indonesia’s Industrial Sector?

Biomass and Hydropower in Indonesia’s Renewable Energy Mix

Renewable energy sources beyond solar and geothermal also contribute to Indonesia’s energy transition. Hydropower has significant development potential across regions with suitable water resources, while biomass can utilize agricultural and organic waste as an energy resource.

Indonesia’s 2025–2034 RUPTL reflects the importance of these resources, with planned additions of 11.7 GW of hydropower and 0.9 GW of bioenergy, alongside solar, wind, geothermal, and energy storage.

These resources can complement solar and geothermal within Indonesia’s broader renewable energy mix. The combination of different renewable sources, supported by interconnected grids and energy-management technologies, can help create a more diversified and resilient electricity system.

Read also: Why Is Skilled Labor Important for Industrial Growth in Indonesia?

Powering a More Sustainable Industrial Future at Subang Smartpolitan

For industrial parks, the relevance of renewable energy lies not only in the availability of a particular renewable resource, but in how clean energy is integrated with reliable infrastructure and the operational needs of businesses.

Subang Smartpolitan is being developed with this broader approach in mind. The parks is supported by smart infrastructure and a renewable-energy strategy – the solar power project.

This initiative complements the park’s broader positioning as a “Smart, Green, and Sustainable City” for industry and commercial businesses—bringing together renewable energy, smart infrastructure, and integrated utility management to support the evolving needs of modern businesses.

For investors, this integrated approach provides a foundation for pursuing operational efficiency and sustainability while supporting long-term business growth. As Indonesia’s renewable energy capacity continues to expand, industrial parks that can connect reliable infrastructure with renewable-energy opportunities will play an increasingly important role in the country’s transition toward a more sustainable industrial future.