Best Solar Energy Companies in Ireland
The 42 best Solar Energy companies in Ireland in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Mainstream Renewable Power.
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Our analysis of 100 Solar Energy companies
$30.5b in tracked funding; 83% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Solar Energy companies in Ireland
| # | Company | Disclosed funding | Last round | Stage | Founder | Founded | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Mainstream Renewable Power Developer wind and solar energy plants | $759M | 47 mo ago | Acquired | Eddie Connor Founder & CEO | 2008 | WordPressMySQLPHP+22 | 2 patents Wind turbine rotor blade design and extension for increased aerodynamic efficiency. | — |
| 2 | Amarenco Producer of independent solar power | $523M | 41 mo ago | Series D | Olivier Carre CEO | 2013 | WordPressMySQLPHP+25 | — | — |
| 3 | Aer Soleir Developer of wind and solar energy projects | $250M | 52 mo ago | Series D | — | 2021 | WordPressPleskMySQL+14 | — | — |
| 4 | ePower Provider of electric vehicle chargers and solar panel solutions for properties | $20M | 23 mo ago | Series A | Epower Systech Founder | 2018 | WordPress Block EditorCart FunctionalityWooCommerce+28 | — | 1 expansion |
| 5 | Circal Company that develops and operates solar and energy storage projects | $17M | 23 mo ago | Series B | Bill Sadlier Founder & CEO | 2022 | — | — | — |
| 6 | BNRG Renewables Utility-scale solar energy project developer | $9M | 44 mo ago | Seed | David Maguire CEO & Founder | 2007 | WordPressApple iCloud MailMySQL+16 | — | — |
| 7 | Nines Photovoltaic Manufacturer of dry etching tools for solar cell production | $4M | 99 mo ago | Series A | — | 2010 | — | — | — |
| 8 | Terra Solar Developer of solar energy power projects | $3M | 118 mo ago | Seed | — | 2016 | — | — | — |
| 9 | Power Capital Solar power project developer | $123K | 88 mo ago | Acquired | Peter Duff Co-Founder & Director | 2011 | WordPressApple iCloud MailMicrosoft 365+20 | — | — |
Top 11 Solar Energy companies in Ireland
#1
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
#2
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
#3
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
#4
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
#5
Series D · Dublin, Leinster · founded 2021 · 20 employees$250Mraised▾
Developer of wind and solar energy projects
- Apr 2022Series D$250M
#6
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
#7
Series A · Dublin, Leinster · founded 2010 · 5 employees$3.9Mraised▾
Manufacturer of dry etching tools for solar cell production. It offers a unique, low-cost, gas-phase etching process for the photovoltaic industry. This process eliminates the need for high-cost vacuum pumps and plasma modules, resulting in superior efficiencies, etch rates, and process control. The technology is scalable for large-scale manufacturing and compatible with various silicon wafer types and advanced cell architectures. The company also develops advanced single-side nano-texturing processes for high-efficiency monocrystalline cells. The etching gas used is environmentally friendly, reducing water consumption and environmental impact.
- May 2018Series A$3.5M
- Apr 2014Grant (prize money)$1.1M
- Sep 2013Seed$373K
#8
Seed · Dublin, Leinster · founded 2016 · 2 employees$2.9Mraised▾
Developer of solar energy power projects
- Oct 2016Seed$2.7M
- May 2016Angel$141.4K
#9
Acquired · Dublin, Leinster · founded 2011 · 26 employees$123.5Kraised▾
Power Capital is a Dublin based company which develops and invests in solar power plants. Services offered include advisory, design, installation, and maintenance of solar PV systems for commercial, retail, education, agriculture and public sector clients. Projects include a 5MW Loughgerald PV in Monfin, Co. Wexford, a 25MWp ground-mounted Dysart PV system in Johnstownbridge, Co. Kildare and a 5MW Red Brae Rd solar PV Farm near Carrickfergus, Ireland.
- May 2019Grant (prize money)$123.5K
#10
Seed · Carrickmacross, County Monaghan · founded 2007 · 185 employees—raised▾
Activ8 Solar Energies supply and install solar thermal heating system all over Ireland across commercial and residential locations. The company claims to have installed over 7000 systems so far and operates primarily in the solar thermal space. Their solar collectors carry a 10-year warranty, copper cylinders come with a 2-year warranty and stainless steel cylinders have a 25-year manufacturer's warranty.
- Apr 2018Seed—
#11
Funding Raised · Cork, Munster · founded 1993—raised▾
Developer of large-scale renewable energy projects. This company develops, constructs, and operates renewable energy assets globally. Their expertise spans onshore and offshore wind, solar PV, and ocean energy technologies, including wave and tidal power. They focus on sustainable and environmentally responsible methods, integrating energy storage solutions into their developments. The company also works with new storage and transport technologies based on hydrogen.
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Solar Energy coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding flat · growth rising
How research on Solar Photovoltaics is moving in Ireland
A read on the academic research around Solar Photovoltaics — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 147 Ireland-affiliated papers.
- University College Cork28
- University College Dublin20
- Trinity College Dublin20
- Technological University Dublin15
- Dublin City University9
- Photovoltaic system1→9
- Solar energy1→8
- Optoelectronics1→5
- Solar energy1→27
- Photovoltaic system2→26
- Solar cell1→8
- Photovoltaic system1→13
- Solar energy1→12
Where solar pv 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.