Star Energy

What Star Energy does

Star Energy Geothermal Group is Indonesia's largest geothermal energy producer, operating a portfolio of three geothermal power plants in West Java with a combined installed capacity of 875 MW (886 MW as of July 2025 after the Salak Binary project). The plants are Wayang Windu (227 MW, Bandung regency), Salak (377 MW, Sukabumi/Bogor regency), and Darajat (271 MW, Garut regency), all feeding baseload renewable electricity into the Java-Madura-Bali grid under long-term power purchase agreements with PLN, Indonesia's state electricity utility. Star Energy also holds government-assigned exploration acreage at Hamiding (North Halmahera) and Sekincau (Lampung Barat), and operates a Renewable Energy Certificate (REC) program serving corporate customers.

The company employs both flash steam and binary cycle power generation technologies. Its principal technology differentiator is the Fracture Characterization and Optimized Well Placement (FCOWP) technique developed with Schlumberger through the DELFI Cognitive E&P Environment — described as the world's first fracture modeling method for geothermal drilling, intended to identify subsurface sweet spots, improve drilling success rates, and reduce the levelized cost of electricity. Plant automation is being modernized through ABB Ability Symphony Plus DCS at Wayang Windu. Operations are recognized by repeated PROPER Gold/Green awards and multiple Subroto Awards from Indonesian ministries.

Revenue is generated primarily through long-term electricity sales to PLN under regulated tariffs (subscription-like recurring revenue) and secondarily through direct REC issuance to corporate buyers such as PT Johnson & Johnson Indonesia. The asset base is funded through operating cash flow and US$1.69 billion of green bond financing issued in 2018 and 2020, with bond ratings of Baa3 (Moody's) and BBB- (Fitch). Star Energy Geothermal is a wholly-owned subsidiary of PT Barito Renewables Energy Tbk (IDX: BREN), the listed renewable energy vehicle of the Barito Pacific Group, which itself consolidates Star Energy's financials. The company employs 501–1,000 people across Jakarta headquarters and West Java operations.

Name

Star Energy

Legal name

Star Energy Geothermal Group

Website

https://starenergygeothermal.co.id

Company type

Private

Founded year

2003

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Star Energy Geothermal is Indonesia's largest geothermal energy producer, operating 875 MW of installed capacity across three West Java power plants (Wayang Windu, Salak, Darajat) and supplying baseload renewable electricity to PLN under long-term power purchase agreements.

Ownership category

akta.pro rank

Product category

Geothermal Power Generation

NAICS

Geothermal Electric Power Generation (221116)

SIC

Electric Services (4911)

akta.pro primary industry

Geothermal Power Plant Development & IPP (Permitting, Financing, Project Development) (EUAMAEAD)

akta.pro secondary industry

Geothermal Power Generation Operations & Maintenance (Plant O&M, Performance Optimization) (EUAMAEAF)

Keywords

• Geothermal power generation
• Renewable electricity supply
• Baseload energy services
• Geothermal exploration services
• Renewable energy certificates

Headquarters

HQ city

Jakarta

HQ country

Indonesia

HQ region

Asia

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Operations, Infrastructure, Technology or R&D, Personnel, Supply Chain, Marketing or Sales

Revenue model

1. Electricity Generation and Sales: Sale of electricity generated from geothermal power plants to PLN (Perusahaan Listrik Negara), Indonesia's state electricity company. Long-term power purchase agreements underpin revenue streams.
2. Renewable Energy Certificates (REC): Issuance and sale of Energy Attribute Certificates including Renewable Energy Certificates to corporate customers enabling them to claim renewable energy usage.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Star Energy Geothermal develops, owns, and operates geothermal power generation assets in Indonesia, primarily three West Java fields (Wayang Windu 227 MW, Salak 377 MW, Darajat 271 MW) totaling 875 MW of baseload renewable capacity sold to state utility PLN under long-term PPAs. The company also issues and sells Renewable Energy Certificates (RECs) to corporate buyers and conducts geothermal exploration at Hamiding (North Halmahera) and Sekincau (Lampung).

Product overview

Star Energy Geothermal is Indonesia's largest geothermal energy producer operating a platform of geothermal power generation assets. The company manages three producing geothermal power plants (Wayang Windu at 227 MW, Salak at 377 MW, and Darajat at 271 MW) with a combined installed capacity of 875 MW, all located in West Java. The portfolio includes Binary cycle technology for power generation from lower-temperature geothermal resources, and the company is expanding through new unit developments (Salak Binary, Wayang Windu Unit 3, Salak Unit 7) and retrofitting existing units. Star Energy also provides geothermal exploration services in new areas (Hamiding, Sekincau) and issues Renewable Energy Certificates (RECs) that certify renewable electricity production for end-users.

Differentiator

Problem solved

Functional benefit

Products and services

• Wayang Windu Geothermal Power Plant 227 MW geothermal power plant located in Bandung regency, West Java, operated by Star Energy Geothermal (Wayang Windu) Limited (SEGWWL) in partnership with Pertamina and PLN; supplies baseload renewable electricity to the Java-Madura-Bali grid.
• Salak Geothermal Power Plant 377 MW geothermal power plant (steam and electricity capacity) located in Sukabumi and Bogor regency, West Java, operated by Star Energy Geothermal Salak, Ltd. (SEGS) in partnership with Pertamina and PLN; approximately 70 km from Jakarta.
• Darajat Geothermal Power Plant 271 MW geothermal power plant (steam and electricity capacity) located in Garut regency, West Java, operated by Star Energy Geothermal Darajat II, Limited (SEGD II) in partnership with Pertamina and PLN.
• Renewable Energy Certificate (REC) Energy Attribute Certificates issued from Star Energy's geothermal facilities (including PLTP Salak) that certify the production of electricity from renewable geothermal sources; enables corporate end-users such as PT Johnson & Johnson Indonesia to make verifiable claims about renewable energy usage (e.g., 100% renewable electricity, green supply chain).
• Hamiding Geothermal Exploration Government-assigned geothermal exploration services at Gunung Hamiding in North Halmahera regency, conducted by PT Star Energy Geothermal Indonesia (SEGI) to identify and assess geothermal resources for future power generation development.
• Sekincau Geothermal Exploration Government-assigned geothermal exploration services at South Sekincau in Lampung Barat regency, conducted by PT Star Energy Geothermal Suoh Sekincau (SEGSS) to identify and assess geothermal resources for future power generation development.

Quantifiable outcome

• Likelihood of successful well drilling increased through fracture modeling technology
• +1 more outcomes

Named customers3 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability1 record

Feature1 record

Partnerships

Ten partnerships are on record, tiered core and supporting.

• SLB (Schlumberger)coreStrategic or Co-development Partner · 23 February 2026SLB partnered with Star Energy Geothermal for geothermal development including the Sekincau project, with frameworks established for identifying future opportunities including in North America. The partnership leverages SLB's subsurface expertise and global execution capabilities.
• ABBcoreTechnology or Integration · 19 December 2025ABB partnered with Star Energy Geothermal to modernize the distributed control system at the Wayang Windu geothermal power plant in West Java, upgrading Units 1 and 2 to ABB Ability™ Symphony Plus DCS. The project supports the plant's expansion to three units totaling 230.5 MW.
• SLB (Schlumberger)coreStrategic or Co-development Partner · 11 March 2025SLB and Star Energy Geothermal signed a technology collaboration agreement to develop and deploy technologies for geothermal asset development. The partnership combines geothermal expertise with SLB's industrial technology solutions for enhanced asset performance.
• Schlumberger (SLB)coreTechnology or Integration · 19 January 2022Star Energy Geothermal partnered with Schlumberger to develop the world's first geothermal fracture modeling technique to determine sweet-spot areas for drilling. The collaboration combines SEG's geothermal resource management expertise with Schlumberger's fracture characterization technologies through the DELFI Cognitive E&P Environment. Results include permeability maps identifying subsurface productive areas to reduce drilling costs and LCOE.
• Yayasan Sahabat Cipta (YSC)supportingImplementation/ SI/ Consulting Partner · 25 October 2021YSC served as implementing partner for integrated coffee cultivation program supporting farmers in Pasirwangi and Samarang, Garut regency. The program provides assistance on high quality and economical coffee cultivation with revolving fund scheme supported by SEGD II's community development program.
• Cornell UniversitysupportingOthers · 22 October 2021Star Energy Geothermal collaborated with Ivy League Cornell University to launch a Women's Leadership Program, a five-month program to support and empower professional women leaders at Star Energy through strategic and technical training. Program conducted virtually in collaboration with Genashtim Innovative Learning.
• PT Johnson & Johnson IndonesiasupportingGTM or Marketing Partner · 6 October 2021Johnson & Johnson Indonesia purchased Renewable Energy Certificates (REC) from Star Energy Geothermal Salak power plant to achieve 100% electricity from renewable sources and establish a green supply chain in Indonesia.
• INSEAD Business SchoolsupportingOthers · 10 October 2020About 55 Star Energy Geothermal leaders completed the INSEAD acceleration-learning program, a two-year educational program consisting of six modules and three capstone, to improve leadership, business and management skills.
• PT Pertamina (Oil and Gas)coreStrategic or Co-development PartnerPertamina (Oil and Gas) works in partnership with Star Energy Geothermal and PLN for geothermal operations at Darajat and Salak power plants.
• PLN (Perusahaan Listrik Negara)coreGTM or Marketing PartnerPLN (Electricity) works in partnership with Star Energy Geothermal and Pertamina for geothermal operations at Darajat and Salak power plants, purchasing electricity for the Java-Madura-Bali grid.

Scale indicators9 records

Recent moves10 records

Expansion highlights5 records

Market position

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/star.energy.geothermal.salak
• LinkedInlinkedin.com/company/star-energy

Compliance10 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Subsidiaries5 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Star Energy