Stellae Energy
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.
- Company typePrivate
- Founded2020
- HeadquartersLondon, United Kingdom
- Headcount1–10
- GTM typeB2B
- OfferingServices
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.
Stellae Energy firmographics
Firmographics- 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
Stellae Energy industry classification
Industry- 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
Where Stellae Energy is headquartered
LocationHeadquarters
- HQ city
- London
- HQ country
- United Kingdom
- HQ region
- Europe
Offices1 record
Markets served
Stellae Energy business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- 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.
- 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.
- 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
Stellae Energy product offering
Product offeringCore 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
Companies that use Stellae Energy
Customer profileNamed customers5 records
Segments4 records
Ideal customer profiles3 records
Stellae Energy technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature7 records
Stellae Energy partnerships and signals
Strategic signalPartnerships
Six partnerships are on record, tiered core and flagship.
- Resilience EnergycoreLocal 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 VanuatuflagshipSigning 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 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 GovernmentflagshipDetailed 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)coreHosted 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 FoundationcoreProvided 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
Stellae Energy competitors and assessment
Company assessmentEmerging 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
Stellae Energy social profiles
Digital presenceStellae Energy financial estimates
Financial estimateRevenue estimate
Valuation estimate
Stellae Energy leadership team
Management profileNumber of profiles
Profiles2 records
Stellae Energy funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Stellae Energy M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Stellae Energy
What does Stellae Energy do?
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.
Is Stellae Energy a public or private company?
Stellae Energy is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Stellae Energy founded?
Stellae Energy was founded in 2020. It employs 1 to 10 people.
Where is Stellae Energy based?
Stellae Energy is headquartered in London, United Kingdom, in the Europe region.
How does Stellae Energy make money?
Three revenue lines are on record. Project Development and EPC Delivery is the primary driver. The others are advisory Services and flexible Participation Models.
Who are Stellae Energy's main competitors?
Emerging players on record are ITM Power, HDF Energy, GreenFire Energy, Eavor Technologies and Gravity Power. Direct peers are KenGen, Cyrq Energy and Ormat Technologies. Energy Development Corporation (EDC, Philippines) is listed as a regional player. Eni (Geothermal & Plenitude) is listed as a broad incumbent.
Does Stellae Energy have an API?
No public API is recorded for Stellae Energy.
What industry is Stellae Energy in?
Stellae Energy's product category is Renewable Energy Project Development. Its primary akta.pro industry code is EUAMAJAB, Microgrid Development, EPC & Integration, with a secondary code of EUAEAMAA, Utility-Scale Power Generation Asset Management. Its NAICS code is 221116 and its SIC code is 4911.