Best Energy Companies in Ireland
The 177 best Energy companies in Ireland in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Mainstream Renewable Power.
Ireland's Energy sector has real money behind it. This directory ranks 177 tracked companies by disclosed equity funding, with $1.9B in total capital across the field and Mainstream Renewable Power commanding $759M of that alone. Amarenco sits second at $523M. Those two don't just dominate the list, they explain why Ireland keeps appearing in conversations about serious renewable infrastructure bets. SuperNode ($39M), ePower ($20M), and Circal ($17M) fill out a mid-tier that's genuinely active, backed by names like Blackstone, Enterprise Ireland, and ClimateLaunchpad.
So what's moving the needle right now? Solar PV, EV battery technology, and energy management systems are the hot themes this quarter, and app-layer engagement confirms it: median install growth across energy apps is running at roughly +28% YoY across 138 tracked titles. Wind energy's expansion drivers are well-documented, and green energy's pull on AI data investment is accelerating the capital case for exactly the kind of grid-adjacent plays Ireland specialises in. If you're sizing up which companies here have genuine momentum, I'd weight recent funding rounds against those themes. The zero-unicorn stat is notable, but it reads less like a ceiling and more like a market that hasn't peaked yet.
- International grid edge study reveals countries needs and readiness f
Our analysis of 441 Energy companies
$135.1b in tracked funding; 76% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Energy companies in Ireland
| # | Company | Disclosed funding | Last round | Employees | Founder | Tech stack | Market signals (1y) | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Mainstream Renewable Power Developer wind and solar energy plants | $759M | 44 mo ago | 650 | Eddie Connor Founder & CEO | WordPressMySQLPHP+22 | — | 2 patents Extending wind turbine blades to increase rotor diameter and power output. | — |
| 2 | Amarenco Producer of independent solar power | $523M | 39 mo ago | 220 | Olivier Carre CEO | WordPressMySQLPHP+25 | 4 signals ▼20% Funding · Capital raise | — | — |
| 3 | Aer Soleir Developer of wind and solar energy projects | $250M | 50 mo ago | 20 | — | WordPressPleskMySQL+14 | — | — | — |
| 4 | Stream BioEnergy Developer of bioenergy projects | $73M | 60 mo ago | 22 | Kevin Fitzduff Managing Director | WordPressMySQLPHP+15 | — | — | 1 partnership |
| 5 | San Leon Energy Developer of oil and gas assets in Africa | $44M | 132 mo ago | 16 | Oisin Fanning Chairman & CEO | — | — | — | — |
| 6 | SuperNode Developer of wind energy projects | $39M | 20 mo ago | 52 | — | WordPressApple iCloud MailMicrosoft 365+25 | — | 44 patents Superconducting cable assemblies and advanced cryogenic cooling systems for high‑temperature superconductors | — |
| 7 | Wind Energy Direct Develops wind farms | $29M | 182 mo ago | 5 | Dominic Costello Founder & MD | — | — | — | — |
| 8 | Nualight LED lighting manufacturer | $26M | 134 mo ago | 36 | Andrew Cronin CEO | WordPressMySQLPHP+26 | — | 60 patents Air purification devices, ergonomic cabinet hardware, and LED lighting solutions. | — |
| 9 | ePower Provider of electric vehicle chargers and solar panel solutions for properties | $20M | 21 mo ago | — | Epower Systech Founder | WordPress Block EditorCart FunctionalityWooCommerce+28 | — | — | 1 expansion |
| 10 | Circal Company that develops and operates solar and energy storage projects | $17M | 20 mo ago | — | Bill Sadlier Founder & CEO | — | — | — | — |
| 11 | Gazelle Wind Power Developer of wind energy projects | $15M | 11 mo ago | 13 | Jon Salazar Founder and CEO | WordPressMySQLPHP+20 | — | 50 patents Floating offshore wind turbine platforms with advanced mooring and anchoring systems | — |
| 12 | EireComposites Designer and manufacturer of fibre-reinforced composite materials | $13M | 42 mo ago | 60 | Patrick Feerick CEO & MD | WordPress Block EditorWordPressMySQL+26 | — | — | 1 job opening |
| 13 | United Oil & Gas Oil & gas exploration and production company | $11M | 27 mo ago | 7 | — | WordPressMySQLPHP+26 | — | — | — |
| 14 | BNRG Renewables Utility-scale solar energy project developer | $9M | 42 mo ago | 50 | David Maguire CEO & Founder | WordPressApple iCloud MailMySQL+16 | — | — | 1 partnership |
| 15 | Biotricity Manufacturer of wind turbine systems | $9M | 101 mo ago | — | Declan Kennedy CEO & MD | — | — | — | — |
| 16 | Clontarf Energy Explorer and developer of lithium and oil & gas resources | $7M | 61 mo ago | — | David Horgan CEO & MD | — | — | — | — |
| 17 | Obelisk Provider of telecoms and renewable energy infrastructure solutions | $7M | 121 mo ago | 6 | — | WebflowTypekitGoogle Font API+14 | — | — | 2 awards |
| 18 | ESB Networks Electricity transmission and distribution company | $4M | 86 mo ago | 792 | — | Progress SitefinityMicrosoft ASP.NETOneTrust+10 | — | — | 1 award |
| 19 | Nines Photovoltaic Manufacturer of dry etching tools for solar cell production | $4M | 96 mo ago | 5 | — | — | — | — | — |
| 20 | Terra Solar Developer of solar energy power projects | $3M | 115 mo ago | 2 | — | — | — | — | — |
| 21 | Worrell Harvesting Wood chip and biomass feed stock producer | $2M | 113 mo ago | — | Kenneth Worrell Founder | — | — | — | — |
| 22 | US Oil and Gas Oil and gas exploration and production company | $1M | 74 mo ago | — | Brian McDonnell Founder & CEO | WordPressMySQLPHP+11 | — | — | — |
| 23 | Vivid Edge Provider of HVAC system installation and repair services | $269K | 33 mo ago | 6 | Paul Boylan Technical Director and Co-Founder | — | — | — | — |
| 24 | Power Capital Solar power project developer | $123K | 85 mo ago | 26 | Peter Duff Co-Founder & Director | WordPressApple iCloud MailMicrosoft 365+20 | — | — | — |
| 25 | Fincovi Provider of asset performance, compliance & reporting and financial management services | $85K | 83 mo ago | 14 | — | — | — | — | — |
| 26 | Dare Technology Portable wind turbines for marine use | $56K | 48 mo ago | — | Darren Hayes Co-Founder | — | — | — | — |
| 27 | Simply Blue Group Developer of offshore wind energy projects | — | 7 mo ago | 100 | Hugh Kelly Co-Founder & Group Managing Director | WordPressMySQLPHP+23 | — | — | 1 job opening · 2 partnerships · 1 award |
Top 12 Energy companies in Ireland
#1
Series B · Dublin, Leinster · founded 2020 · 13 employees$15Mraised▾
Developer of wind energy projects
- Jul 2025Series B$1.7M
- May 2025Conventional Debt$2.3M
- Nov 2024Series B$12.1M
- Mar 2022Series A$1.5M
#2
Series A · Dublin, Leinster · founded 2018 · 52 employees$39Mraised▾
Developer of wind energy projects
- Oct 2024Series A$8.8M
- Apr 2023Series A$15.4M
- May 2022Series A$14.8M
- Jan 2021Seed—
#3
Series A · Cork, Munster · founded 2018$19.9Mraised▾
Provider of electric vehicle chargers and solar panel solutions for properties. They offer supply, installation, and maintenance for residential, commercial, and public sector clients. Support services, managed solutions, and grant assistance are available. The company also retails EV charging cables and operates a charging point app.
- Sep 2024Series A$17.7M
- Sep 2023Seed$2.1M
#4
Series B · Dublin, Leinster · founded 2022$16.7Mraised▾
Circal is a developer of solar and co-located energy storage projects in Ireland and the US, specializing in site discovery and development. The company's focus is on delivering renewable energy solutions that work for everyone, with a track record of commercially successful projects.
- Sep 2024Series B$16.7M
#5
Series D · Cork, Munster · founded 2013 · 220 employees$523.3Mraised▾
Producer of independent solar power
- Mar 2023Series D$321.5M
- Nov 2020Series C$177.9M
- Oct 2020Conventional Debt$14.2M
- Apr 2020Series B$16.2M
#6
Acquired · Dublin, Leinster · founded 2008 · 650 employees$758.7Mraised▾
Developer wind and solar energy plants
- Sep 2022Conventional Debt$290M
- Mar 2022Series C$633M
- Sep 2020Conventional Debt$620M
- Nov 2019Conventional Debt$580M
#7
Series D · Dublin, Leinster · founded 2021 · 20 employees$250Mraised▾
Developer of wind and solar energy projects
- Apr 2022Series D$250M
#8
Public · Dublin, Leinster · founded 2015 · 7 employees$10.9Mraised▾
United Oil & Gas is an oil & gas exploration and production company. Has a focus on onshore exploration and production. Operational in Wessex Basin, UK, and Podere Gallina in the Po Valley region of onshore Italy, as of Feb'18. Planning to start redevelopment well project in the Italian Podere Gallina. Acquired Senterra Energy in July 2017.
- Feb 2024Post IPO$1.3M
- Sep 2018Post IPO$3.9M
- May 2018Post IPO$3.6M
- Oct 2017Post IPO$2.1M
#9
Funding Raised · Galway, Connaught · founded 2006 · 60 employees$13.1Mraised▾
EireComposites (formed by merger of Irish Composites, Composites Testing Laboratory, PPA Teo. and Gaoth-Tec Teo.) provides designing, testing, and manufacturing of fibre-reinforced composite materials. It also develops composite components and assemblies for international aerospace programmes and has participated in multiple European Union R&D programmes in the aerospace sector. It uses its proprietary technology to develop the thermoplastic composites. It provides composite design service using CATIA V5 and finite element analysis using software such as PATRAN and NASTRAN.
- Dec 2022Grant (prize money)$499.5K
- Mar 2021Grant (prize money)$1.2M
- Dec 2020Grant (prize money)$633.6K
- Apr 2020Grant (prize money)$270.2K
#10
Series B · Dublin, Leinster · founded 2009 · 22 employees$73.2Mraised▾
Developer of bioenergy projects
- Jun 2021Series B$73.2M
#11
Seed · Dublin, Leinster · founded 2007 · 50 employees$9.1Mraised▾
BNRG Renewables is a renewable energy project developer, based in Dublin, Ireland which develops, constructs, owns and operates utility-scale solar projects across the globe. Projects include 15MW Bilsham solar farm in the UK, 20MW Sycamore solar farm in the UK and 6MW solar power project in Kamenar, Bulgaria.
- Dec 2022Conventional Debt$9M
- May 2022Seed—
- May 2022Conventional Debt—
- Feb 2015Grant (prize money)$100.9K
#12
Public · Dublin, Leinster · founded 1995 · 16 employees$44.3Mraised▾
Developer of oil and gas assets in Africa. This company focuses on securing and developing high-potential oil and gas asset opportunities. Its strategy centers on achieving production and near-term operating cash flow to generate shareholder value. The company leverages its technical expertise, operational capabilities, and industry contacts to build strong relationships with governments, partners, and local communities. The core of its operations involves the exploration and development of oil and gas resources.
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Energy coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding flat · growth flat
How research on Grid Energy Storage is moving in Ireland
A read on the academic research around Grid Energy Storage — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 190 Ireland-affiliated papers.
- University of Limerick34
- University College Cork33
- University College Dublin33
- Trinity College Dublin21
- Advanced Materials and BioEngineering Research15
- Electrode1→8
- Battery (electricity)1→19
- Supercapacitor1→16
- Photovoltaic system1→13
- Thermal energy storage1→11
- Wind power1→8
- Renewable energy6
- Environmental economics6
- Nanotechnology5
- Electronics4
- Battery (electricity)4
Where energy storage is researched across Ireland
Location clusters by institution affiliation — each city's volume, stance tone, and a quick read on its hot topic, what's advancing, the opening opportunity, and the main concern.
Common questions
Rohit lives in the feed. He covers what's moving right now — the funding rounds, launches and shifts breaking across the trade press — and ties them back to where the sector is heading.