Geothermal Powerhouse: Indonesia’s Booming Green Giant
Indonesia isn’t just known for its stunning landscapes and vibrant culture; it’s also a geothermal energy powerhouse!
Nestled on the Ring of Fire, the country boasts the world’s largest estimated geothermal potential, with a whopping 23.7 gigawatts (GW) across 300 identified sites. That’s like harnessing the power of over 23 million homes!
Leading the Charge:
Despite its immense potential, Indonesia currently utilizes only a fraction of its geothermal capacity, ranking second globally with 2,130.7 MW of installed capacity. But the country is on a mission to change that. The government has ambitious plans to triple its geothermal capacity within the next decade, driven by:
- Energy Security: Geothermal offers a reliable, baseload source of power, crucial for a rapidly growing economy like Indonesia’s.
- Environmental Sustainability: Unlike fossil fuels, geothermal energy is clean and renewable, reducing greenhouse gas emissions and air pollution.
- Economic Opportunities: The sector attracts significant foreign investment and creates high-skilled jobs.
Challenges and Opportunities:
While the future looks bright, challenges remain. High upfront costs, complex exploration and development processes, and land acquisition issues can hinder progress. To overcome these hurdles, Indonesia needs:
- Streamlined regulations and licensing procedures to expedite project development.
- Enhanced financial incentives to attract more investments, particularly for exploration and drilling.
- Technology innovation to improve efficiency and reduce costs.
- Community engagement to ensure local communities benefit from the development and address concerns.
The Path Forward:
Indonesia’s geothermal journey is an inspiring story of potential and progress. With continued commitment from the government, industry, and international partners, the country can unlock its geothermal potential and become a true leader in clean and sustainable energy production, not just for itself but for the entire region.
Geothermal Power Plants in Indonesia: A Booming Green Energy Landscape
Indonesia’s geothermal power sector is one of the fastest-growing in the world, thanks to its abundant geothermal resources and commitment to clean energy. Here’s a list of some of the major geothermal power plants in Indonesia, along with their capacities:
Java Island:
- Kamojang Geothermal Power Plant: Located in West Java, Kamojang is the oldest and largest geothermal power plant in Indonesia with a total capacity of 377 MW. It consists of several units, the first of which started operating in 1983.
- Darajat Geothermal Power Plant: Also in West Java, Darajat has a total capacity of 243 MW. It’s known for its innovative binary cycle technology, which utilizes lower-temperature geothermal resources.
- Salak Geothermal Power Plant: Situated in Central Java, Salak has a capacity of 140 MW. It’s known for its scenic location, surrounded by mountains and rice paddies.
- Dieng Geothermal Power Plant: Located in Central Java, Dieng has a capacity of 60 MW. It’s one of the highest geothermal power plants in Indonesia, situated at an altitude of over 2,000 meters.
- Karaha Geothermal Power Plant: Located in West Java, Karaha has a capacity of 30 MW. It’s the first geothermal power plant in Indonesia to be built by a private company.
Sumatra Island:
- Sarulla Geothermal Power Plant: Located in North Sumatra, Sarulla has a capacity of 330 MW. It’s the largest geothermal power plant outside Java and plays a vital role in powering the island’s electricity grid.
- Ulubelu Geothermal Power Plant: Located in Lampung, Ulubelu has a capacity of 110 MW. It’s known for its advanced technology and environmental sustainability practices.
- Lumut Balai Geothermal Power Plant: Located in South Sumatra, Lumut Balai has a capacity of 110 MW. It’s one of the newest geothermal power plants in Indonesia and plays a key role in meeting the growing energy demand in the region.
Beyond Java and Sumatra:
- Lahendong Geothermal Power Plant: Located in North Sulawesi, Lahendong has a capacity of 80 MW. It’s the first geothermal power plant in Eastern Indonesia and serves as a model for future development in the region.
- Wayang Windu Geothermal Power Plant: Located in West Java, Wayang Windu has a capacity of 50 MW. It’s known for its unique flash steam technology and its contribution to rural electrification.
Table of Geothermal Power Plants in Indonesia
Geothermal Power Plants in Indonesia (as of January 15, 2024)
| Island | Power Plant | Capacity (MW) | Year Initiated | Key Features |
|---|---|---|---|---|
| Java | Kamojang | 377 | 1983 | Oldest & largest, multiple units |
| Java | Darajat | 243 | – | Innovative binary cycle technology |
| Java | Salak | 140 | – | Scenic location, surrounded by mountains |
| Java | Dieng | 60 | – | High altitude (2,000+ meters) |
| Java | Karaha | 30 | – | First private-built geothermal plant |
| Sumatra | Sarulla | 330 | – | Largest outside Java, powers North Sumatra |
| Sumatra | Ulubelu | 110 | – | Advanced technology & environmental focus |
| Sumatra | Lumut Balai | 110 | – | New plant, supports regional energy demand |
| Sulawesi | Lahendong | 80 | – | First in Eastern Indonesia, model for future projects |
| Java | Wayang Windu | 50 | – | Unique flash steam technology & rural electrification |
Notes:
- Capacities may vary depending on source and recent updates.
- Year initiated information not readily available for all plants.
- Key features provided are highlights; additional details may exist for each plant.
This is just a glimpse of the extensive geothermal power plant landscape in Indonesia. With continued investment and development, Indonesia is poised to become a global leader in clean and sustainable energy production.
Key Takeaway:
- Indonesia sits on a massive geothermal treasure trove, but only a fraction is tapped.
- Ambitious plans aim to triple capacity within a decade, driven by energy security, environmental benefits, and economic opportunities.
- Challenges remain, including regulations, financing, technology, and community engagement.
- Overcoming these hurdles can make Indonesia a global geothermal leader and a beacon for clean energy.
https://www.exaputra.com/2024/01/indonesia-geothermal-power-plant.html
Renewable Energy
Hitting the Tipping Point
Have we hit the tipping point on climate change? For example, has the melting permafrost in the Arctic released so much methane that a runaway feedback loop has been established?
As suggested at left, an analogous question could be asked about the level corruption in the U.S. government.
Renewable Energy
Nordex Outsells Vestas, GE Vernova Rebuilds Wind Team
Weather Guard Lightning Tech

Nordex Outsells Vestas, GE Vernova Rebuilds Wind Team
Nordex closes in on Vestas in onshore orders, GE Vernova rebuilds its wind team, Nexxis buys BladeBug, and wooden blades draw doubts.
The Uptime Wind Energy Podcast is brought to you by Weather Guard Lightning Tech, creators of the StrikeTape Ultra LPS retrofit. Subscribe to Uptime’s Substack newsletter. And check out Rosemary’s “Engineering with Rosie” Youtube channel. Have a question we can answer on the show? Email us!
Renewable Energy
Siemens Gamesa Builds Hornsea Blades, NEMS Invests in Perth
Weather Guard Lightning Tech

Siemens Gamesa Builds Hornsea Blades, NEMS Invests in Perth
Siemens Gamesa starts Hornsea 3 blade production in Hull, Germany approves an Offshore Wind Act amendment, and Nexxis buys BladeBUG.
The Uptime Wind Energy Podcast is brought to you by Weather Guard Lightning Tech, creators of the StrikeTape Ultra LPS retrofit. Subscribe to Uptime’s Substack newsletter. And check out Rosemary’s “Engineering with Rosie” Youtube channel. Have a question we can answer on the show? Email us!
Episode Transcript
Uptime News Flash
September 7, 2026
Happy Monday, everyone. Well, let’s talk about the biggest wind farm on earth. It doesn’t exist yet, but its blades are being built right now. Over in Hull, England, Siemens Gamesa just started making blades for Ørsted’s Hornsea 3 offshore wind farm. That’s two point nine gigawatts, one hundred and ninety-seven turbines. Each blade is longer than a football pitch. Fourteen hundred workers build blades in that factory, turning raw materials into finished product. When complete, Hornsea 3 will power more than three million British homes. It’s the single largest offshore wind farm in the world.
And if we slide over to Germany for a moment, the German cabinet just approved an amendment to the Offshore Wind Act, the WindSeeG. It’s headed to the Bundestag next. The goal? New rules by January first, twenty twenty-seven. But the Offshore Wind Energy Foundation says the draft does not go far enough. Sixteen gigawatts of awarded projects are still waiting on final investment decisions. Sixteen — that’s quite a few. The foundation wants a new way for developers to hand back sites they can’t build, so those sites can be re-tendered quickly under conditions that actually work. Sort of a use-it-or-lose-it approach. That’s the idea.
We’ll head a little further east to India. India ranks fourth in the world for installed wind power, but probably not for long. A government official said this week that India will overtake Germany and become the world’s third-largest wind energy nation by twenty thirty — one hundred seven gigawatts of installed capacity. India added a record six gigawatts last year alone, shattering their previous record of a little over four gigawatts. And twenty-eight more gigawatts are under construction right now. Impressive.
Let’s head down to Western Australia, because a company called National Electric Motor Services, NEMS for short, is building a one million dollar facility in Perth to test and repair wind turbine generators. Right now, Australian wind farm operators ship their broken generators overseas for repairs, and that takes months. NEMS is the only authorized service center for ELIN Motoren in all of Western Australia. This is the fifth project funded through Australia’s Wind Energy Manufacturing Co-investment program. Local repair, faster turnaround, and homegrown capability — that’s all good.
And staying in Australia, Perth-based Nexxis Technology just bought a British robotics company, BladeBUG. BladeBUG is a robot that uses suction cups to crawl across wind turbine blades. Nexxis already has a robot called Magneto that uses electromagnetic adhesion to climb steel structures. If you put the two together, you can inspect almost any surface on a turbine, or about anything else. Add AI and machine vision, and you have robots that can see what human eyes might miss, from places human hands shouldn’t have to reach. It’s safer, faster, and it’s going to be a lot smarter.
One more story before we finish today. Siemens Gamesa has now installed more than 300 recyclable blades in six countries. The secret is a new resin. Unlike conventional resins, this one lets you separate the blade components at end of life, so you can separate the fabric from the resin. Cool stuff. Jonas Pagh Jensen, head of sustainability at Siemens Gamesa, says the technology is ready for full-scale use. And Siemens Gamesa has already installed 36 GreenerTower units — steel towers with 63% lower carbon emissions. So although sustainability may have faded from the headlines, it’s still in tender documents, and it’s showing up more than ever. In Denmark, the Netherlands, and France, buyers are all asking about recyclability and decarbonization before they award contracts.
So what should you be watching this week? Recyclability is no longer a nice-to-have — it’s a must-have, and it’s showing up in tender scoring. If your blades can’t be recycled at end of life, you may not win the contract to begin with. And a lot of supply chains are going local. Australia doesn’t want to ship generators overseas anymore. India is building its own turbine factories. The countries buying wind power want it built at home. For professionals in the wind industry, the competitive edge is shifting — it’s not just who can build the best turbine, it’s who can build it locally, recycle it fully, and inspect it without putting a person in a harness.
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