Wayang Windu geothermal power plant has played a pivotal role in Indonesia’s electricity supply in the last few decades. The electricity generated at Wayang Windu feeds the Jamali grid, which provides power for millions of households across the islands of Java, Madura and Bali. As part of its modernization initiative, Star Energy Geothermal (SEG), a subsidiary of Barito Renewables, is collaborating with ABB to further enhance the facility in West Java. By 2025, this 230.5 MW MW geothermal power plant will comprise three units, with Unit 3 currently under development. The capacity at Wayang Windu contributes to a total 910 MW of geothermal energy produced by SEG in West Java.
ABB has modernized the distributed control system (DCS) at Wayang Windu Units 1 and 2 to ABB Ability™ Symphony Plus DCS, enabling SEG to more effectively manage the variable demands of geothermal power generation while maintaining stable and reliable electricity supply. ABB’s modernization solution not only helped streamline scalability, enabling seamless integration between existing and future units without significant infrastructure upgrades, but also delivered a more robust and resilient control system for Units 1 and 2.
As a result, SEG has experienced greater system stability, reduced downtime and improved operational efficiency. The modular design of Symphony Plus supports future capacity expansion and optimizes control architecture, driving stronger cost efficiency and reinforcing the long-term reliability of SEG’s geothermal power plant operations.
As part of the project scope, ABB also upgraded the Human Machine Interface (HMI) systems for Wayang Windu Units 1 and 2, transitioning from the legacy Power Generation Portal (HMIPGP) platform to the advanced Symphony Plus (S+). For Unit 3, ABB has implemented the Symphony Plus DCS as part of the ongoing expansion efforts at the geothermal plant. These enhancements further strengthen SEG’s ability to support future growth at the facility. Geothermal energy is one of Indonesia’s most promising renewable resources. According to the Indonesian Geothermal Association, the country holds around 40 percent of the world’s geothermal reserves, spread across Sumatra, Java, Bali, Nusa Tenggara and Sulawesi, and attributable to its location along the Pacific Ring of Fire[1]. However, out of a total potential of approximately 24,000 MW, only about 10 percent has been utilized to date.
SEG is planning to harness this vast potential by continuing to develop geothermal at Wayang Windu. SEG also operates geothermal facilities in Gunung Salak and Darajat .
“Star Energy Geothermal is best positioned to support the energy transition journey. Underpinned by our decades-long experience, we are committed to unlocking the full potential of geothermal power. By partnering with a global technology leader like ABB, we harness global expertise and proven solutions that accelerate our progress towards a low carbon future for Indonesia,” said Hendra Soetjipto Tan, Group CEO of Star Energy Geothermal.
“We are proud of our long-standing collaboration with Star Energy Geothermal. At ABB, we believe that technology is one of the key enablers in making renewable energy, such as geothermal, a dependable and scalable power source for Indonesia. Through our automation expertise, we are committed to helping industries optimize operations, boost reliability and accelerate the shift towards a low-carbon future,” said Anders Maltesen, President of ABB’s Energy Industries division, Asia.
Through the National Energy General Plan[2] (RUEN 2020–2024), the Indonesian government has set a target of utilizing approximately 7,200 MW of geothermal capacity by 2025. Recent industry insights from the Asia Pacific Energy Transition Readiness Index 2025 conducted by ABB’s Energy Industries division shows that 87 percent of the organizations in Indonesia expect renewable energy use to grow by more than 20 percent in the next five years, with the top three sources of this coming from solar, hydropower and geothermal. Expanding the capacity of geothermal energy not only strengthens the country’s energy independence but also builds a more resilient and sustainable energy future for Indonesia.
[1] INAGA | Indonesia Geothermal Association
[2] https://iesr.or.id/en/pustaka/ruen-existing-plan-current-policies-and-energy-transition-scenario/
