PGE’s journey of utilizing geothermal energy to produce electricity began in 1974 with the exploration and exploitation activities by Pertamina upon the discovery of 70 geothermal points in Indonesia. In 2006, PGE was established to pass the baton of geothermal energy development and management for the purpose of producing clean energy that is both economically and environmentally friendly.
Pertamina was mandated to locate geothermal reserves across Indonesia to be utilized for electricity production.
Kamojang Geothermal Power Plant Unit 1 with an installed capacity of 30MW started operating by utilizing geothermal energy from the Kamojang field in West Java Province. In 1987, Kamojang Geothermal Power Plant Units 2 and 3 with total installed capacity of 110 MW started its commercial activities.
The utilization of geothermal energy expanded to Sumatra Island with the operation of Sibayak Monoblok Area Geothermal Power Plant. The power plant, with a capacity of 2 MW, is located in Sibayak-Sinabung Mountains Geothermal Work Area, North Sumatra Province.
After Java and Sumatra, geothermal energy utilization efforts expanded to Sulawesi. On 21 August 2001, Lahendong Geothermal Power Plant Unit 1 started operating. The 20-MW-capacity power plant utilizes geothermal energy from the Lahendong Power Plant Work Area, North Sulawesi Province.
As part of its commitment to geothermal energy utilization, Pertamina established PT Pertamina Geothermal Energy (PGE) as a subsidiary company. PGE’s focus is to continue the business management aspect of developing and utilizing Indonesia’s geothermal energy potential.
One year after its establishment, PGE inaugurated an additional Geothermal Power Plant unit in Lahendong Geothermal Work Area, North Sulawesi Province. The construction of the 20-MW-capacity Lahendong Area Geothermal Power Plant Unit II started in 2004.
To optimize geothermal production wells in West Java, PGE added another Power Plant unit in Kamojang Geothermal Work Area. The Kamojang Geothermal Power Plant Unit IV started operating with a capacity of 60 MW. In the same year, PGE inaugurated two Geothermal Power Plants in Sibayak-Sinabung Mountains Geothermal Work Area with a capacity of 2 x 5 MW. Sibayak Area Geothermal Power Plant Units I and II are operated to meet the electricity demand of North Sumatra Province.
To meet the electricity demand of North Sulawesi Province, PGE inaugurated Lahendong Area Geothermal Power Plant Unit II with a capacity of 20 MW, which is located in Lahendong Geothermal Work Area. With the operation of 3 Geothermal Power Plant units, PGE is able to supply clean and environmentally friendly energy to the people of North Sulawesi.
The journey of geothermal energy utilization in Sulawesi continued with the inauguration of Lahendong Area Geothermal Power Plant Unit IV. The 20-MW-capacity power plant complements the existing 3 units with a capacity of 60 MW.
The effort to meet electricity demands with renewable energy continued to the southern part of Sumatra. On 6 December 2012, the President of the Republic of Indonesia inaugurated not only one, but two Geothermal Power Plant units (Ulubelu Geothermal Power Plant Units I and II) with a capacity of 2 x 55 MW, located in Ulubelu Geothermal Work Area, Lampung.
PGE continued to increase the capacity of geothermal power plants in West Java. On 5 July 2015, the President of the Republic of Indonesia inaugurated Kamojang Area Geothermal Power Plant Unit V with a capacity of 35 MW, which operates commercially by supplying electricity to PT PLN (Persero).
The geothermal potential in North Sulawesi can be found in 3 locations: Lahendong, South Lahendong (Tompaso), and Kotamobagu. After the 4 Geothermal Power Plant units in Lahendong Geothermal Work Area commenced operations, PGE added another 2 units which utilizes the geothermal energy in Tompaso area. Lahending Geothermal Power Plant Units V and VI, with a capacity of 2 x 20 MW, was planned to meet the electricity demands of North Sulawesi, Central Sulawesi, and Gorontalo.
In the same year, PGE also started operating an additional PLTP unit in Lampung. PLTP Ulubelu Unit III has a capacity of 55 MW.
PGE has completed the drilling of 23 geothermal wells to meet the energy demands of geothermal power plant projects in Ulubelu. In addition to meet the demands of Ulubelu Geothermal Power Plant Unit III, which started operating in the previous year, the geothermal well was utilized for the 55-MW-capacity Geothermal Power Plant Unit IV, which started its commercial operations on 25 March 2017.
PGE has completed its exploration activities and the construction of Karaha Geothermal Power Plant Unit 1 in West Java Province. The 30-MW power plant started its commercial operations on 6 April 2018 to supply electricity to households in Tasikmalaya and its surrounding areas.
As of June 2019, the realization of geothermal power plants installed capacity has reached 617 MW. To increase the installed capacity, PGE expedited the operation of Lumut Balai Geothermal Power Plant Unit 1. The 55-MW power plant is located in Muara Enim District, South Sumatra, and started commercial operations in September 2019.
In August 2021, the Power and New Renewable Energy (PNRE) subholding was legally established. PNRE subholding is the new fuel for Pertamina’s efforts in achieving energy transition, supporting national energy resilience, and realizing the national decarbonization agenda. As part of PNRE subholding, PGE is committed to the acceleration of geothermal energy source provision to support the achievement of sustainable development goals.
On 24 February 2023, PGE transformed into PT Pertamina Geothermal Energy Tbk. and has officially listed its shares for trading on the Main Board of the Indonesian Stock Exchange (IDX) with the stock code PGEO.