ALPHAXIOMS Geothermal News & Energy Research

Major Geothermal Projects of Pertamina Geothermal Energy (PGEO) Set to Secure US$613 Million (Rp10.18 Trillion) Funding from World Bank, ADB, and Others By: Robert Buluma   Four flagship geothermal projects of PT Pertamina Geothermal Energy (PGEO) have entered Indonesia’s 2025-2029 Blue Book, opening the door to US$613 million (Rp10.18 trillion) in concessional loans from World Bank, ADB, JBIC, and JICA. The projects will add 215 MW of clean energy and boost local economies.   Indonesia, sitting on the Pacific Ring of Fire, possesses the world’s largest geothermal reserves  nearly 24 GW of proven potential. Yet only about 2,300 MW has been tapped so far. That is about to change in a big way. On December 4, 2025, PT Pertamina Geothermal Energy Tbk (IDX: PGEO) announced that four of its major geothermal projects have officially been included in Indonesia’s prestigious Blue Book 2025-2029 compiled by Bappenas (Ministry of National Development Planning). This inclusion ...

PGE’s Lumut Balai Unit 2: A 55 MW Geothermal Triumph Rewriting Indonesia’s Clean Energy Future By:  Robert Buluma Indonesia has once again staked its claim as a global geothermal heavyweight. With the successful operationalization of the Lumut Balai Unit 2 Geothermal Power Plant, PT Pertamina Geothermal Energy Tbk (PGE) has delivered a strategic blow in the global race toward clean baseload energy. More than just a 55 MW addition to the country’s energy mix, this project marks a bold step in Indonesia’s ambition to expand its geothermal capacity to 1 gigawatt within the next few years. In a world grappling with climate volatility, unstable energy prices, and growing demand for reliable renewable power, this achievement resonates far beyond Indonesia’s borders. It signals a shift — a declaration that geothermal energy is rapidly maturing, scaling, and proving itself as the backbone of modern clean-energy systems. A Milestone Project in a Region Rich With Geothermal Potential Lumut ...

Archi Indonesia and Ormat Form Powerful Geothermal Joint Venture: A 40 MW Vision That Could Redefine North Sulawesi’s Energy Future By: Robert Buluma In a decisive move that signals Indonesia’s accelerating transition toward renewable energy, Archi Indonesia (ARCI ) —one of the country’s largest pure-play gold mining companies—has joined forces with global geothermal powerhouse Ormat Technologies . Their new joint venture, PT Toka Tindung Geothermal (TTG) , aims to deliver a 40-megawatt geothermal power plant within ARCI’s mining concession in North Sulawesi. The partnership is more than a business deal. It represents a strategic realignment in Indonesia’s energy landscape, a recalibration of ARCI’s identity, and a major step forward for geothermal development in Southeast Asia. Below is a deep, comprehensive look at what this collaboration means, what it could unlock, and why it deserves the attention of every energy observer today. A Bold Partnership: ARCI Holds 5%, Ormat Lead...

The EPC contract was signed with a consortium of reputable partners  Sumitomo Corporation , PT Inyi Kanya Teknik Persada , and PT Wasa Mitra Engineering  ensuring a collaborative effort that leverages the strengths of each organization.  By: Robert Buluma The contract signing events included a handover ceremony held on February 13, 2025, at  SEML's Head Office and the official contract signing on December 24, 2025 . This article delves into the details of the project, the significance of this milestone, and its anticipated impact on the local community and Indonesia’s broader renewable energy objectives. Project Overview: The Muara Laboh Stage 2 Geothermal Project Understanding Geothermal Energy in Indonesia Indonesia is uniquely positioned as one of the world's richest countries in geothermal resources. Geothermal energy harnesses the natural heat stored beneath the Earth's surface, offering a sustainable, clean, and renewable power source. As global energy ...