Best Energy Companies in Spain
The 519 best Energy companies in Spain in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: NORTEGAS.
Spain's Energy sector is one of Europe's most closely watched right now, and this page ranks 519 tracked companies by disclosed equity funding and recent momentum. Total disclosed funding across the cohort sits at $7.3B, with Vertex Bioenergy leading the pack at $359M, well ahead of Altano Energy at $70M and Holaluz at $28M. One unicorn has emerged from the group. Backers like the European Investment Bank and EIT InnoEnergy are the names appearing most consistently across cap tables, which tells you something about where institutional conviction is concentrated.
So what's actually moving the needle? Hot themes this quarter are solar electricity generation, solar PV, and EV battery technology, and that tracks with the grid edge readiness findings showing distributed energy resources reshaping national infrastructure priorities. Median install growth for energy apps is running at roughly +28% YoY across 138 tracked apps, a quiet signal that consumer-facing energy tools are gaining real traction. I'd also flag that supply-chain stress globally, with geopolitical disruption pushing energy export realignments, is nudging Spanish operators toward domestic diversification faster than most analysts expected. The regulatory tailwind from EU decarbonization mandates isn't hurting either.
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 Spain
| # | Company | Disclosed funding | Last round | Stage | Employees | Founded | Market signals (1y) | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | NORTEGAS Natural gas distribution company | $1.6B | 104 mo ago | Funding Raised | 131 | 2003 | — | — | — |
| 2 | T-Solar Solar photovoltaic large plants | $630M | 76 mo ago | Acquired | 21 | 2006 | — | 19 patents Solar mounting/support structures and thermally managed micro‑LED lighting modules | — |
| 3 | Acciona Energy Provider of renewable energy solutions | $567M | 53 mo ago | Public | 2,974 | 1997 | 26 signals ▲62% Acquisition · Earnings · Funding | — | — |
| 4 | X-Elio Offers turnkey project development solutions | $476M | 59 mo ago | Acquired | 240 | 2005 | — | — | 1 partnership |
| 5 | Vela Energy Solar Energy IPP | $446M | 119 mo ago | Funding Raised | 40 | 2014 | — | — | — |
| 6 | EDP Renewables Generation of wind power | $408M | 40 mo ago | Public | 936 936 → 1,932 (+106%) | 2007 | — | — | — |
| 7 | Fotowatio Renewable Ventures Developer of utility scale renewable energy solutions | $392M | 47 mo ago | Acquired | 200 | 2006 | 4 signals Contracts · Acquisition | — | — |
| 8 | Vertex Bioenergy Manufacturer of Bioethanol | $359M | 16 mo ago | Acquired | 87 | 2016 | — | — | — |
| 9 | CLH Group Provider of oil storage and transportation company | $300M | 128 mo ago | Public | — | 1927 | — | — | — |
| 10 | Matrix Renewables Operator of renewable energy platform focused on developing solar, and clean energy projects | $283M | 27 mo ago | Funding Raised | 79 | 2020 | 14 signals ▲367% Leadership · Contracts · Funding | — | 1 expansion |
| 11 | Prosolia Energy Provider of end-to-end solar development and EPC services | $278M | 34 mo ago | Series A | 148 | 2003 | 8 signals ▲700% Funding · Acquisition | — | 1 partnership |
| 12 | opde nergy Developer of renewable energy projects | $203M | 66 mo ago | Public | 174 | 2005 | — | — | 1 award |
| 13 | Solarpack Utility scale solar project developer | $195M | 87 mo ago | Series A | 337 | 2005 | — | — | 1 award |
| 14 | Bow Power Investor and developer of renewable energy projects | $175M | 93 mo ago | Deadpooled | 23 | 2015 | — | — | — |
| 15 | Alter Enersun Turnkey solution provider for solar PV projects | $172M | 30 mo ago | Series D | 39 | 2009 | — | — | — |
| 16 | Eolia Renovables Developer and operator of solar and wind power plants | $159M | 102 mo ago | Acquired | — | 2007 | — | — | — |
| 17 | Soltec Developer of photo voltaic solar energy | $115M | 92 mo ago | Acquired | 1,817 | 2004 | 13 signals ▲160% Capital raise · Regulatory · Funding | — | — |
| 18 | Altano Energy Developer of solar and wind energy projects | $70M | 10 mo ago | Series C | 7 | 2021 | — | — | — |
| 19 | SolarMente Provider of solar panel installation services | $55M | 27 mo ago | Seed | 32 | 2019 | — | — | — |
| 20 | Alten Energias Renovables Independent solar power producer | $50M | 99 mo ago | Funding Raised | 48 | 2006 | — | — | — |
| 21 | Grenergy Developer of large scale PV energy systems and solar energy projects | $47M | 84 mo ago | Public | 228 | 2007 | 43 signals ▲126% Contracts · Acquisition · Funding | — | 1 job opening · 1 expansion |
| 22 | Haizea Wind Group Manufacturer of wind towers and offshore foundations | $38M | 22 mo ago | Funding Raised | 1,200 | 2017 | — | — | — |
| 23 | Holaluz Power retailing company | $28M | 18 mo ago | Public | 287 | 2010 | — | — | — |
| 24 | Eranovum Provider of investment, development, construction, and operation of solar photovoltaic plants | $28M | 48 mo ago | Series B | — | 2018 | — | — | 3 expansions |
| 25 | Ingenostrum Developer of solar and wind energy projects | $28M | 29 mo ago | Acquired | — | 2009 | — | — | — |
| 26 | Gamma Solutions Provides installation and maintenance services for utility-scale solar projects | $24M | 104 mo ago | Funding Raised | 95 | 2002 | — | — | — |
| 27 | Solaria Independent power producer | $22M | 1 mo ago | Public | 236 | 2002 | — | — | 1 expansion |
| 28 | Samara Provider of solar energy services | $19M | 20 mo ago | Series A | 78 | 2022 | — | — | — |
| 29 | Nomad Solar Energy Provider of portable solar energy solutions, offering innovative products and services to bring clean energy… | $17M | 20 mo ago | Series B | — | 2023 | — | 5 patents Modular mounting and joining systems for mobile photovoltaic panel installations | — |
| 30 | Gestamp Wind Wind power project developer | $16M | 143 mo ago | Funding Raised | — | 2007 | — | — | — |
| 31 | EIDF Solar Developer of solar energy projects | $16M | 19 mo ago | Public | 87 | 2008 | — | — | — |
| 32 | Sunhero Provider of solar panel installation services | $15M | 32 mo ago | Series A | 94 | 2021 | — | — | — |
| 33 | Basquevolt Solid state batteries aiming to become the leader in the next generation of solid state lithium batteries | $11M | 4 mo ago | Series A | 55 | 2022 | 3 signals Funding | 12 patents Advanced lithium‑ion battery electrolytes and electrode coating technologies | 1 internship · 1 award |
| 34 | IEQSY Provider of energy efficiency system | $11M | 41 mo ago | Late Stage | 8 | 2017 | — | — | — |
| 35 | Arena Power Developer of solar PV projects | $9M | 35 mo ago | Funding Raised | 82 | 2018 | — | — | — |
| 36 | Amelia Offering drone-powered data management and AI-driven analytics for solar energy | $6M | 3 mo ago | Series A | — | 2015 | — | — | 1 job opening |
| 37 | Wedge Global Oilfield service company | $5M | 48 mo ago | Funding Raised | 14 | 2008 | — | 16 patents Design and control of switched‑reluctance and superconducting linear electric machines | — |
| 38 | Nido Providerof aerothermal energy services | $5M | 16 mo ago | Seed | — | 2023 | — | — | — |
| 39 | GFM Fotovoltaica Provider of solar self-consumption solutions for individuals, companies, and industries | $3M | 28 mo ago | Funding Raised | — | 2000 | — | — | — |
| 40 | Ariema Provider of electrolyzers manufacturing and hydrogen & fuel cell consulting services | $2M | 36 mo ago | Seed | — | 2002 | — | — | 1 expansion |
| 41 | Nabrawind Technology for wind turbine design and development | $2M | 24 mo ago | Acquired | 33 | 2015 | — | 44 patents Wind turbine blade handling, crane‑free lift systems, and tower‑blade transition components. | 2 job openings · 2 awards |
| 42 | Abora Manufacturer of hybrid solar panels | $2M | 18 mo ago | Funding Raised | 52 52 → 35 (-33%) | 2017 | — | — | 1 partnership |
| 43 | Koalalifter EPC service provider for wind energy projects | $2M | 32 mo ago | Seed | 18 | 2015 | — | — | — |
| 44 | Enerocean Developer of marine energy technology adapting offshore technologies for floating solutions | $2M | 45 mo ago | Seed | 18 | 2007 | — | 7 patents Floating anchored offshore platforms for renewable energy generation | — |
| 45 | Windar Renovables Manufacturer of wind towers | $2M | 28 mo ago | Late Stage | 175 | 2007 | — | — | 1 partnership · 1 expansion |
| 46 | Solfy Online marketplace for self-consumption of solar energy, enabling individuals and businesses to produce their… | $1M | 9 mo ago | Seed | 8 | 2022 | — | — | — |
| 47 | Robinsun Portable and self-installable solar kits for households. | $623K | 16 mo ago | Seed | — | 2023 | — | — | 2 job openings |
| 48 | INGECID Provider of engineering, construction, and systems integration solutions | $606K | 35 mo ago | Funding Raised | 22 | 2008 | — | 27 patents Patents concentrated in computing, sensing & instrumentation | 1 award |
| 49 | Ingelia Provider of organic waste processing services | $562K | 7 mo ago | Series B | 14 | 2005 | — | 55 patents Converting lignocellulosic biomass into bio‑fuels, biopolymers, and flame‑retardant materials. | — |
| 50 | SolarYou Provider of residential solar panel installation and related services | $509K | 13 mo ago | Seed | — | 2023 | — | — | — |
Top 12 Energy companies in Spain
#1
Public · Madrid, Community of Madrid · founded 2002 · 236 employees$22Mraised▾
Solaria is an independent power producer in the solar energy sector. Started as a manufacturer of photovoltaic cells and panels and is now a producer and seller of power from its solar plants connected to the grid.
- Apr 2026Post IPO$351M
- Nov 2022Grant (prize money)$2.8K
- Dec 2017Venture Debt$10.9M
- Nov 2011Post IPO$30M
#2
Acquired · Madrid, Community of Madrid · founded 2016 · 87 employees$359.2Mraised▾
Vertex Bioenergy is functioning as a bioenergy plant, majorly engaged in the business of producing bioethanol through fermentation of sugars, present in raw materials as the cereals (wheat, barley, corn and sorghum). The plant has an inbuilt process of producing steam and electricity to satisfy the self-supply needs of the plant, leftover is distributed to the grid.
- Feb 2025Conventional Debt$359.2M
- Apr 2021Seed—
- Jun 2017Seed—
#3
Series A · Vitoria-Gasteiz, Basque Country · founded 2022 · 55 employees$10.9Mraised▾
Basquevolt is a European pioneer in solid-state lithium batteries, aiming to lead the next generation of solid-state battery technology. The company is focused on producing 10GWh of solid-state batteries by 2027 and has a strong public-private collaboration with Basque and international companies.
- Feb 2026Series A—
- Mar 2025Series A$10.9M
#4
Series C · Madrid, Community of Madrid · founded 2021 · 7 employees$70.3Mraised▾
Developer of solar and wind energy projects
- Jul 2025Series C$70.3M
#5
Series A · Sant Feliu de Llobregat, Catalonia · founded 2015$5.8Mraised▾
Offering drone-powered data management and AI-driven analytics for solar energy. It provides an online platform that integrates software and drones to enhance efficiency and reduce costs in various sectors such as mining, construction, and renewable energy. Their solution facilitates the capturing and analysis of visual data.
- Mar 2026Series A$5.8M
- Mar 2026Grant (prize money)—
- Mar 2026Conventional Debt—
#6
Public · Barcelona, Catalonia · founded 2010 · 287 employees$28Mraised▾
Holaluz supplies electric power to residential and small-medium enterprises in Spain. Claims to manage complete services through online and supply 100% renewable energy. Purchases power from renewable projects through physical bilateral contracts. Other services are natural gas supply, installation of e-vehicle charging station, installation of solar system and energy storage systems.
- Nov 2024Post IPO$15.8M
- Jan 2022Post IPO$7.6M
- Sep 2021Grant (prize money)$138.3K
- Feb 2016Series A$4.3M
#7
Funding Raised · Madrid, Community of Madrid · founded 2020 · 79 employees$283Mraised▾
Operator of renewable energy platform focused on developing solar, and clean energy projects
- Feb 2024Conventional Debt$283M
#8
Funding Raised · Basque Country · founded 2017 · 1200 employees$37.8Mraised▾
Manufacturer of wind towers and offshore foundations
- Aug 2024Conventional Debt$37.8M
#9
Series A · Madrid, Community of Madrid · founded 2022 · 78 employees$18.5Mraised▾
Provider of solar energy services
- Sep 2024Series A$1.6M
- Jun 2024Series A$9.8M
- Dec 2022Seed$4.8M
- Jun 2022Seed$2.1M
#10
Series A · Valencia, Valencian Community · founded 2003 · 148 employees$278.5Mraised▾
Provider of end-to-end solar development and EPC services. It focus on development, financing, construction, operation, and management of solar PV assets. Offers various types of solar projects, such as self-consumption and energy management, solar parks, hangars, and PV carports.
- Aug 2023Conventional Debt$280M
- Oct 2017Series A$1.1M
- Jan 2015Grant (prize money)$161.7K
- Sep 2013Grant (prize money)$350K
#11
Public · Pontevedra, Galicia · founded 2008 · 87 employees$15.9Mraised▾
Developer of solar energy projects
- Nov 2024Post IPO$15.9M
#12
Series B · Valencia, Valencian Community · founded 2005 · 14 employees$561.7Kraised▾
Provider of organic waste processing services
- Oct 2025Series B$785K
- Mar 2024Series A—
- Oct 2023Grant (prize money)$317.2K
- Jun 2020Series A$561.7K
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 rising · growth rising
How research on Grid Energy Storage is moving in Spain
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 1,116 Spain-affiliated papers.
- Universitat Politècnica de Catalunya95
- Universidad de Sevilla84
- CIC energiGUNE72
- Universidad Politécnica de Madrid63
- University of the Basque Country59
- Battery (electricity)2→66
- Renewable energy3→54
- Electrolyte3→45
- Electrochemistry2→37
- Supercapacitor6→36
- Renewable energy9→134
- Battery (electricity)7→77
- Photovoltaic system5→59
- Electrochemistry2→47
- Electricity3→42
- Renewable energy1→34
- Battery (electricity)3→23
- Thermal energy storage1→12
- Electrolyte3→13
- Photovoltaic system1→11
Where energy storage is researched across Spain
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.