[REVISION HISTORY]

Gunung Ungaran geothermal project and Indonesia energy road

Updated 9 times since CLSTR started tracking revisions of this situation.

What changed

2026-10-10 14:08 UTC → 2026-10-11 12:42 UTC · added ~~removed~~

The proposed geothermal energy project in the Gunung Ungaran area of Central Java, designated as a National Strategic Project, remains a key component of Indonesia’s energy security initiatives. PT PLN (Persero) is tasked with developing the 55 MW Ungaran Geothermal Working Area as part of the 2025–2034 Electricity Supply Business Plan (RUPTL). The project has faced local opposition due to concerns regarding environmental damage, risks to biodiversity like the Javan Hawk-eagle, and potential disruptions to drinking water sources for Semarang City and the Gedong Songo Temple complex. Recent developments emphasize the need for a data-driven approach to mitigate these risks. Ali Ahmudi Achyak of the University of Indonesia’s Research Group on Energy Security for Sustainable Development has stressed that geothermal expansion should be conducted gradually. He noted that comprehensive studies regarding hydrology and hydrogeology—including spring and river flow, water quality, and groundwater levels—are essential to protect water sources, biodiversity, and cultural heritage before proceeding. As part of a broader national energy transition, ~~the government~~ Indonesia is ~~pursuing a roadmap to reduce fossil fuel import reliance. This includes a phased transition to bioethanol, with plans~~ advancing several renewable initiatives. PT PLN (Persero) is now providing verified green electricity to ~~introduce E10 in 2027~~ 59 national corporations through products like Renewable Energy Certificates (REC) and ~~E20 in 2028, eventually aiming for E50. Additionally, President Prabowo Subianto has directed the exploration of coal-to-liquid technology~~ Green Energy as a Service (GEAS) to ~~produce gasoline and gas from coal. To support these transitions,~~ ensure energy traceability. Simultaneously, the ~~RUPTL 2025–2034 seeks massive investment, estimated between Rp2,600 trillion and Rp2,700 trillion, with a goal~~ Indonesian Solar Energy Association (AESI) is advocating for ~~70% of new capacity to come from renewable sources. Other related developments include~~ a 100 GWp solar power ~~implementation at Ahmad Yani Airport~~ program to bolster national energy security and ~~regulatory reforms by~~ rural electrification. The government is also pursuing energy independence through biofuel mandates. Following the B40 mandate introduced in early 2025, the B50 program—mandating a 50 percent biodiesel mixture—is being implemented. The Ministry of Energy and Mineral Resources ~~to stabilize nickel~~ projects that B50 could eliminate diesel imports by 2026 and ~~coal commodity prices.~~ save approximately Rp170 trillion in foreign exchange reserves. Additionally, PT Pertamina Patra Niaga Refinery Unit Cilacap is testing Sustainable Aviation Fuel (SAF) production using used cooking oil.

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