Stellae Energy

What Stellae Energy does

Stellae Energy Ltd. is a UK-based private energy transition company founded in 2020, headquartered in London, delivering integrated renewable energy solutions across geographies where diesel dependency, energy poverty, or volcanic/geothermal endowments create acute needs. Its portfolio centres on geothermal energy development (multiple well configurations, Binary ORC power generation, oil/gas well repurposing), green hydrogen and ammonia production via PEM electrolysis with hydrogen storage, hybrid microgrids, standalone power systems, carbon capture and storage (deep saline aquifers, depleted reservoirs, in-situ mineral carbonation), biowaste/biogas, solar PV, wind, and battery energy storage, plus an emerging green fertiliser value chain. The company also offers Ocean Thermal Energy Conversion (OTEC) for tropical island nations and a portfolio of advisory services covering ESG++, due diligence, financing plans, and project stage-gate support.

The business model is project-development centric rather than product- or SaaS-led. Stellae operates as a developer and technical advisor under flexible participation models: project manager/technical advisor (fees), minority interest (sweat equity), or operator with major equity share, with financing arranged from multilateral agencies and commercial banks. Revenue streams therefore combine project-development/EPC delivery economics (project ownership and equity stakes), advisory fees, and operator returns. Distribution is direct enterprise field sales to governments and institutional clients — chiefly Small Island Developing States in the Western Tropical Pacific (Vanuatu, Solomon Islands, Bougainville) and Sub-Saharan Africa (South Africa, with references to Liberia, Mauritania, Senegal) — supported by thought leadership content, LinkedIn presence, Financial Times event participation, and targeted press releases.

At present, Stellae is operating three flagship projects (Western Tropical Pacific geothermal and South African green hydrogen) that remain at MOU or pre-feasibility stage, a small pilot green hydrogen deployment at CPUT supplying three Cape Town township clinics, and is actively raising a private investment round while having secured Innovate UK grant funding. The company does not disclose revenue, headcount, or valuation, and its disclosed funding to date is modest, consistent with a pre-commercial development-stage business.

Name

Stellae Energy

Legal name

Stellae Energy Ltd.

Website

https://stellaeenergy.com

Company type

Private

Founded year

2020

Operating status

Operating

Headcount range

1–10 employees

Short description

Stellae Energy is a UK-based renewable energy project developer founded in 2020, developing geothermal power in the Western Tropical Pacific (Vanuatu, Solomon Islands, Bougainville) and green hydrogen in South Africa, offering advisory services and operating under flexible equity/advisory participation models.

Ownership category

akta.pro rank

Product category

Renewable Energy Project Development

NAICS

Geothermal Electric Power Generation (221116), Electric Power Generation (22111), Solar Electric Power Generation (221114), Wind Electric Power Generation (221115), Electric Power Generation, Transmission and Distribution (2211)

SIC

Electric Services (4911), Cogeneration Services & Small Power Producers (4991), Oil & Gas Field Machinery & Equipment (3533)

akta.pro primary industry

Microgrid Development, EPC & Integration (EUAMAJAB)

akta.pro secondary industry

Utility-Scale Power Generation Asset Management (EUAEAMAA)

Keywords

• Renewable energy solutions
• Geothermal power generation
• Green hydrogen production
• Carbon capture storage
• Energy transition advisory

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Project Development and EPC Delivery: The company combines digital platforms, project development, EPC delivery, financing structures, and long-term asset management to deliver integrated renewable energy solutions. Revenue is generated through project ownership, equity stakes, and delivery contracts.
2. Advisory Services: Comprehensive technical and business solutions including performance reviews, business transformation studies, digitalisation conceptual frameworks, investment due diligence advisory, financing plans, exit strategies assistance, and project sanction and development stage gate support for Energy, Mining, and Renewables sectors.
3. Flexible Participation Models: Revenue streams include project management/technical advisory fees, sweat equity through minority interest, and operator arrangements with major equity share. Financing arrangements with multilateral agencies and commercial banks support project development.

Go-to-market motion3 records

Distribution channels3 records

Marketing channels6 records

Core offering

Stellae Energy is a UK-based energy transition project developer and technical advisor that delivers integrated, end-to-end renewable energy solutions combining project development, EPC delivery, financing structures, and long-term asset management. Core offerings span geothermal energy (multiple well systems, ORC power generation, oil/gas well repurposing), green hydrogen and ammonia production (PEM electrolysis, microgrids), carbon capture and storage, hybrid microgrids, standalone power systems, and ESG++ advisory services for the energy, mining, and renewables sectors.

Product overview

Stellae Energy is an energy transition company delivering integrated, end-to-end renewable energy solutions across multiple geographies. The company combines digital platforms, project development, EPC delivery, financing structures, and long-term asset management. Their product portfolio centers on Green Hydrogen & Ammonia (production, storage, fuel logistics, fuel-cell applications), Hybrid Microgrids (solar-plus-storage, C&I solutions, rural electrification), Biowaste & Biogas conversion, Geothermal Energy Solutions, Solar PV and Wind Energy Systems, Standalone Power Systems (SPS), Carbon Capture and Storage (CCS), and Energy Storage Systems. The company also offers Advisory Services including ESG++ consulting, Business Development & M&A advisory, and expertise in repurposing oil/gas wells for geothermal applications. Additionally, they produce Green Fertilizers through their distributed green hydrogen and ammonia production capabilities.

Differentiator

Problem solved

Functional benefit

Products and services

• Geothermal Energy Solutions End-to-end geothermal power generation harnessing heat from volcanic regions, sedimentary hydrothermal reservoirs, and tectonic plate boundaries, including Binary ORC power generation for low and medium enthalpy resources, offered to governments and developers in Western Tropical Pacific and other markets.
• Green Hydrogen & Ammonia Production, storage, fuel logistics, and fuel-cell applications for transformational, base load, renewable heating and cooling solutions, with distributed production supported by PEM electrolysis from renewable sources.
• Hybrid Microgrids

Quantifiable outcome

• 4kg/day hydrogen production capacity demonstrated at pilot scale
• +2 more outcomes

Named customers5 records

Segments4 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

Six partnerships are on record, tiered core and flagship.

• Resilience EnergycoreStrategic or Co-development Partner · 1 March 2025Local South African partner for green hydrogen pilot project in Cape Town. Resilience Energy is a project manager and local partner working with Stellae Energy on the implementation of green hydrogen production using solar power, providing expertise in solar energy solutions for distributed generation.
• Government of VanuatuflagshipStrategic or Co-development Partner · 2 October 2024Signing of detailed Memorandum of Understanding (MOU) in October 2024 to explore and develop economic, sustainable geothermal power projects. Focus on harnessing abundant volcanic island geothermal resources in the Western Tropical Pacific.
• Autonomous Bougainville GovernmentflagshipStrategic or Co-development Partner · 19 August 2024Strategic partnership to explore the potential for advancement of sustainable geothermal energy projects in the Autonomous Region of Bougainville. Announced by ABG press release, this is a flagship project for Stellae Energy's Western Tropical Pacific geothermal venture.
• Solomon Islands GovernmentflagshipStrategic or Co-development Partner · 1 January 2023Detailed MOU signed in 2023 to explore and develop geothermal power projects. Progress includes pre-feasibility studies and ongoing collaboration to develop economic, sustainable geothermal power projects harnessing volcanic island geothermal resources.
• Cape Peninsula University of Technology (CPUT)coreStrategic or Co-development PartnerHosted the green hydrogen production unit at their Bellville campus, providing solar panel power from campus rooftop and water supply for electrolysis. The partnership enables the demonstration of practical green hydrogen production in South Africa.
• Cipla FoundationcoreStrategic or Co-development PartnerProvided containerised fuel cell facilities for the township clinics in Cape Town, enabling the conversion of green hydrogen to electricity at the point of use for healthcare facilities.

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Emerging players

• ITM Power: ITM Power is a PEM electrolyser manufacturer and project developer. It overlaps with Stellae on PEM electrolysis and green hydrogen project delivery, though ITM is equipment-led rather than a turnkey developer.
• HDF Energy: HDF Energy (Hydrogène de France) develops Renewstable multi-MW hydrogen-plus-renewable plants that pair solar with storage and fuel cells, directly comparable to Stellae's hybrid microgrid / Standalone Power Systems products targeting emerging markets.
• GreenFire Energy: GreenFire commercialises closed-loop geothermal technology for existing oil and gas wells, directly overlapping Stellae's "Geothermal – Repurposing Oil/Gas Wells" solution line and targeting the same decommissioning-cost-driven TAM.
• Eavor Technologies: Eavor is an advanced geothermal developer commercialising closed-loop "Eavor-Loop" technology, a multiple-well closed system analogous to Stellae's doublet/sedimentary configurations. Both target dispatchable geothermal in locations without conventional hydrothermal resources.
• Gravity Power: Gravity Power (and adjacent storage/renewable integrators) compete in the distributed-renewable-plus-storage space; comparable as an emerging player developing novel hybrid generation assets for remote/off-grid markets where Stellae's SPS and microgrid products operate.

Direct peers

• KenGen: Kenya Electricity Generating Company operates one of the world's largest geothermal fleets at the Olkaria field. It is a comparable geothermal power developer in Sub-Saharan Africa, addressing similar baseload needs for an emerging economy and serving as a template for African geothermal utilities.
• Cyrq Energy: Cyrq is a privately-held pure-play geothermal IPP with operating assets in the US and East Africa. Its portfolio of small-to-mid scale geothermal plants makes it a strong peer for an early-stage developer pursuing island/emerging-market baseload.
• Ormat Technologies: Ormat is the largest pure-play geothermal power generator and equipment supplier, with projects in the US, Kenya, Ethiopia, Indonesia and Guatemala. It is the closest listed comparables on geothermal project development, EPC, and binary ORC technology, and operates in similar island/emerging-market settings.

Regional players

• Energy Development Corporation (EDC, Philippines): EDC operates the world's largest geothermal complex at the Valley of Geysers / Tongonan in the Philippines. It is the leading reference for geothermal development in volcanic island nations, directly comparable to Stellae's Western Tropical Pacific strategy.

Broad incumbents

• Eni (Geothermal & Plenitude): Eni has a major geothermal business at Larderello and is developing green hydrogen, biofuels and CCS. Its well-repurposing and integrated energy-transition strategy mirror Stellae's O&G-to-geothermal and hydrogen verticals, but at much larger scale and capex.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/somerset-pet-lodge

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 Stellae Energy