Indonesia-based Pertamina New and Renewable Energy (Pertamina NRE), a subsidiary within the Pertamina Group focused on low-carbon and renewable energy solutions, and HyET Clean Energy Solutions (HCES), a Netherlands-based electrochemical technology developer, have signed a Non-Binding Term Sheet to jointly develop, test, and commercialise advanced electrochemical technologies in Indonesia.
Invest International has signed a Letter of Intent for their involvement in the collaboration.
This collaboration outlines the framework for a multi-phase joint program (“the Project”) to validate technical performance and commercial feasibility, and to explore future manufacturing and licensing rights within Indonesia and the broader ASEAN region.
Leveraging Indonesia’s Geothermal Strengths
Pertamina NRE brings strategic advantages through its geothermal resources, including abundant low-cost baseload power, high-quality geothermal steam, and relatively pure CO₂ streams.
These inputs form an ideal foundation for producing green hydrogen which then combined with biogenic CO₂ can be further developed as green synthetic fuel, a key raw material for e-methanol and e-SAF/e-fuels – crucial for decarbonising aviation, shipping, and other hard-to-abate sectors.
HCES contributes innovative electrochemical technologies, including:
- Proton-conducting solid oxide steam electrolysis (p-SOEC): A high-efficiency electrolysis technology that converts geothermal steam directly into green hydrogen at significantly lower operating temperatures compared to traditional solid oxide steam electrolysis (SOEC).
- Single-step CO₂ electrolysis: A novel process that converts geothermal CO₂ into carbon monoxide using low-cost geothermal baseload electricity.
Together, these technologies can enable cost-effective production of green hydrogen, carbon monoxide, and ultimately green synthetic fuel, positioning Indonesia as a competitive hub for the regional e-fuels and green chemicals market.
Pilot Development in Kamojang
The potential site for the initial pilot has been preliminarily identified within the Pertamina Geothermal Energy (PGE) facilities in Kamojang, subject to further technical and administrative assessments.
The first phase of cooperation aims to jointly develop:
- A 1 MW pilot steam electrolyser based on HCES’s p-SOEC technology, utilising steam and power from the Kamojang geothermal plant.
- A 1 MW pilot CO₂ electrolyser using geothermal CO₂ and electricity from the same site.
The pilot project will generate critical technical and financial data required for scaling to a 10 MW full-scale e-chemicals manufacturing facility in Indonesia.
Such a facility could serve as a production hub for the ASEAN region and help build a domestic supply chain based on critical materials, including nickel.
The timeline for the first pilot is from the beginning- until the end of 2026, once this pilot is achieving the objectives, the scaling/commercialisation phase would be followed right after that.
About Pertamina NRE
Pertamina NRE is the Subholding Power & New and Renewable Energy of PT Pertamina (Persero), Indonesia’s national energy company.
Pertamina NRE plays a central role in accelerating Indonesia’s energy transition by developing and operating clean energy solutions across the country and the region.
Its portfolio includes renewable power generation, green hydrogen, energy storage, and other sustainable technologies that support Indonesia’s decarbonisation roadmap. Through strategic partnerships and innovation-driven initiatives, Pertamina NRE aims to strengthen national energy security while contributing to a low-carbon future.
About HyET Clean Energy Solutions (HCES)
HyET Clean Energy Solutions (HCES) is a Netherlands-based innovator in advanced electrochemical technologies for the production of green hydrogen, carbon monoxide, and green syngas.
The company specialises in high-efficiency proton-conducting solid oxide steam electrolysis (p-SOEC) systems, next-generation CO₂ electrolysis solutions, and state-of-the-art anion exchange membrane (AEM) electrolysis for flexible, modular hydrogen production.
HCES is also active in silicon anode manufacturing, developing high-performance materials that enable next-generation battery technologies.
By integrating cutting-edge electrochemistry, materials science, and industrial-scale engineering, HCES delivers cost-effective solutions that support deep decarbonisation across hard-to-abate sectors and enable the scalable production of e-fuels and green chemicals. The company is part of the HyET Group, a global leader in sustainable energy technologies.
About Invest International
Invest International is a Netherlands-based impact investor focused on accelerating sustainable, innovative, and internationally scalable business activities that contribute to global development and the UN Sustainable Development Goals.
Backed by the Dutch State and FMO, the organisation provides long-term financing, project development support, and strategic partnerships to enable breakthrough technologies and infrastructure in emerging markets.
By combining public purpose with private-sector expertise, Invest International helps bridge financing gaps for transformative projects in sectors such as renewable energy, green industry, climate technology, and sustainable supply chains.
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