Positioned along the Ring of Fire, Indonesia possesses vast geothermal resources estimated at 24 GW. Spanning from Sumatra in the west to Papua in the east, each major island in the country is home to several active volcanoes.
As the world’s second-largest producer of geothermal energy, Indonesia boasts a total installed power-generating capacity of 2,653 MW. The country plans to add an additional 3,300 MW of capacity between 2021 and 2030, aiming to increase geothermal energy to 8% of its total energy mix. With the expansion costs estimated at 14 billion USD, Indonesia is actively seeking participation from companies to support this initiative.
Businesses interested in contributing to Indonesia’s geothermal sector can do so in three key ways:
- Securing rights to conduct preliminary surveys and exploration in designated areas for early-stage geothermal assessments, known as WPSPE.
- Bidding to acquire a geothermal work area, officially recognized as WKP (Wilayah Kerja Panas Bumi).
- Forming partnerships with existing license holders of geothermal work areas. Indonesia has several geothermal energy producers, and many of them are actively expanding their production capacity while exploring new work areas for future energy generation.
The Ministry of Mining and Natural Resources has identified various geothermal work areas (WKP) and areas for preliminary survey and exploration (WPSPE). Some of them are already licensed and developed. Here is the list.
WKP in Aceh, Sumatra
- Jaboi
- Seulawah Agam.
WPSPE in Aceh, Sumatra
- Gn. Geureudong
WKP in North Sumatra
- Sibayak – Sinabung.
- Sibual-Buali
- Sipaholon Ria-ria
- Sorik Marapi
WPSPE in North Sumatra
- Simbolon Samosir
WKP in West Sumatra
- Gunung Talang – Bukit Kili
- Liki Pinangawan Muara Laboh
- Sumani
WPSPE in West Sumatra
- Bonjol
- Cubadak
- Tandikat Singgalang
WKP in Jambi, Sumtra
- Sungai Penuh
WPSPE in Jambi, Sumatra
- Graho Nyabu
WKP in Bengkulu, Sumatra
- Hululais
- Kepahiang
WPSPE in Bengkulu, Sumatra
- Tanjung Sakti
- Lawang Malintang
WKP in South Sumatra
- Lumut Balai.
- Rantau Dedap
WKP in Lampung, Sumatra
- Gunung Rajabasa
- Gunung Way Panas.
- Way Ratai
- Andau Ranau
WPSPE in Lampung, Sumatra
- Sekincau
WKP in Banten, Java
- Kaldera Andau Banten
- Gunung Endut
WKP in West Java
- Cibeureum – Parabakti
- Cibuni
- Cisolok Cisukarame
- Gunung Tamponas
- Gunung Tangkuban Perahu
- Kamojang.
- Darajat
- Karaha Cakrabuana.
- Pangalengan
- Gunung Ciremai
- Gunung Galunggung
WPSPE in West Java
- Cipanas
WKP in Central Java
- Batu Raden
- Dataran Tinggi Dieng.
- Guci
- Gunung Ungaran
- Candi Umbul Telomoyo
- Gunung Lawu
WKP in East Java
- Blawan – Ijen.
- Gunung Iyang Argopuro
- Telaga Ngebel
- Arjuno Wilerang
- Gunung Pandan
- Gunung Wilis
- Songgoriti
WKP in Bali
- Tabanan
WKP in NTB, West Nusa Tenggara
- Sembalun
WPSPE in NTB, West Nusa Tenggara
- Hu’u Daha
WKP in NTT, East Nusa Tenggara
- Atadei
- Sokoria
- Ulumbu
- Mataloko
- Oka Ile Ange
- Gunung Sirung
- Waesano
- Nage
WKP in Central Sulawesi
- Marana
- Bora Pulu
WKP in Central Sulawesi
- Lainea
WKP in North Sulawesi
- Kotamobagu
- Lahendong-Tompaso.
WPSPE in North Sulawesi
- Klabat Wineru
WKP in North Maluku
- Jailolo
- Songa Wayaua
- Telaga Ranu
WPSPE in North Maluku
- Gunung Hamiding
WKP in Maluku
- Tulehu
WPSPE in Maluku
- Wapsalit
Here are geothermal companies that are actively expanding their geothermal assets in Indonesia.
KS Orka Renewables
KS Orka Renewables added a new geothermal power station in December 2024—the 33-MW Sorik Marapi Unit 5. This power station is operated by Sorik Marapi Geothermal Power, a subsidiary of KS Orka Renewables. With this new station, the total installed capacity of the five Sorik Marapi power stations in North Sumatra increased to more than 200 MW.
Medco Cahaya Geothermal
PT MCG started commercial operations of the 35-MW Ijen geothermal power plant in February 2025, the first geothermal power plant in East Java. Medco Cahaya Geothermal is a joint venture between Medco Power Indonesia and Ormat Technologies.
Star Energy Geothermal
Star Energy Geothermal added 15.5 MW of installed power generation capacity from its new Salak binary plant in West Java. With this expansion, the company boasts a total installed capacity of 901.5 MW, making it Indonesia’s largest geothermal power plant operator.
Star Energy Geothermal is also working on increasing power generation capacity in its Darajat and Wayang Windu plants.
Pertamina Geothermal Energy
Pertamina Geothermal Energy is expected to complete its new 55 MW Lumut Balai Unit 2 power plant in May 2025. The company also has plans to start exploration drilling this year in the Seulawah Agam Geothermal Working Area at Aceh, a joint project with PT Pembangunan Aceh (PEMA).
Geo Dipa Energi
Geo Dipa Energi looks forward to adding a new geothermal power plant, the 55-MW Patuha Unit 2, in 2027. Toshiba ESS will supply the steam turbine, generator, and auxiliary equipment. The expansion will double the Patuha power generation capacity to 110MW.
Geodipa is also working on adding a second power station in the Dieng area. The company aims to increase its installed capacity to 1100 MW in 5 years.
Supreme Energy
Supreme Energy Muara Laboh, a joint venture company of Supreme Energy, Sumitomo, and Inpex, plans to complete the 80 MW Muara Laboh Unit 2 in 2027. Supreme Energy also operates the 91.2 MW Rantau Dedap geothermal power plant.
PLN
PLN, Indonesia’s national power company, has started the Atadei Project, aiming to develop a 10 MW geothermal power plant in the Atadei work area, and is acquiring land to drill two wells.
The Atadei geothermal work area is on Lembata Island in East Nusa Tenggara (NTT).
Sources: Various sources, including Geoenergis and ThinkGeoEnergy.
