Best Solar Energy Companies in Spain
The 201 best Solar Energy companies in Spain in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: T-Solar.
Spain's Solar Energy sector has 201 companies in our directory, collectively pulling $4.5B in disclosed funding, and the momentum here is hard to ignore. Matrix Renewables leads the pack at $283M raised, with Prosolia Energy close behind at $278M. Those two alone account for a meaningful slice of the total pool, which tells you where institutional conviction is concentrating. The global solar market sits at roughly $222.1B in 2024 and is forecast to grow at a 20.5% CAGR, driven by decarbonization mandates and shifting energy demand. And as 2017 research documented early on, policy frameworks are often the single biggest accelerant for solar deployment at scale, something Spain's regulatory environment is now stress-testing in real time.
So what's the signal beyond the big raises? Across 138 energy apps tracked, median install growth is running at roughly +28% YoY, a number that reflects genuine consumer pull, not just developer push. Hot themes right now are solar electricity generation, solar PV, and EV energy management systems. I'd watch the EV-solar intersection especially closely this quarter. Backers like EIG Global Energy Partners and EIT InnoEnergy are circling the space, and even a smaller raise like Aerem's Series A shows global appetite for solar startups with a clear deployment story. No unicorns yet in Spain's cohort, but the funding density suggests that gap won't last forever.
- ResearchAndMarkets.com
- MarketsandMarkets
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 Spain
| # | Company | Disclosed funding | Last round | Employees | Founder | Tech stack | Market signals (1y) | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | T-Solar Solar photovoltaic large plants | $630M | 76 mo ago | 21 | Marta Martinez CEO | — | — | 19 patents Solar mounting/support structures and thermally managed micro‑LED lighting modules | — |
| 2 | Acciona Energy Provider of renewable energy solutions | $567M | 53 mo ago | 2,974 | Raphael Matthew CEO | Adobe Experience ManagerJavaYouTube+23 | 26 signals ▲62% Acquisition · Earnings · Funding | — | — |
| 3 | X-Elio Offers turnkey project development solutions | $476M | 59 mo ago | 240 | Lluis Noguera Chief Executive Officer | WordPressApple iCloud MailMicrosoft 365+20 | — | — | — |
| 4 | Vela Energy Solar Energy IPP | $446M | 119 mo ago | 40 | Inigo Olaguibel CEO | — | — | — | — |
| 5 | Fotowatio Renewable Ventures Developer of utility scale renewable energy solutions | $392M | 48 mo ago | 200 | Borja Benjumea Co-Founder & COO | WordPressApple iCloud MailMicrosoft 365+22 | 4 signals Contracts · Acquisition | — | — |
| 6 | Matrix Renewables Operator of renewable energy platform focused on developing solar, and clean energy projects | $283M | 27 mo ago | 79 | — | WordPressMySQLPHP+23 | 14 signals ▲367% Leadership · Contracts · Funding | — | 1 expansion |
| 7 | Prosolia Energy Provider of end-to-end solar development and EPC services | $278M | 34 mo ago | 148 | Juan Guaita Founder | WordPressMySQLPHP+31 | 8 signals ▲700% Funding · Acquisition | — | 1 partnership |
| 8 | opde nergy Developer of renewable energy projects | $203M | 66 mo ago | 174 | Luis Cid Suarez CEO | WordPressMySQLPHP+16 | — | — | 1 award |
| 9 | Solarpack Utility scale solar project developer | $195M | 87 mo ago | 337 | — | JavaBootstrapApache HTTP Server+8 | — | — | 1 award |
| 10 | Bow Power Investor and developer of renewable energy projects | $175M | 93 mo ago | 23 | — | — | — | — | — |
| 11 | Alter Enersun Turnkey solution provider for solar PV projects | $172M | 30 mo ago | 39 | Ricardo Leal CEO & President | WordPressMySQLPHP+13 | — | — | — |
| 12 | Eolia Renovables Developer and operator of solar and wind power plants | $159M | 102 mo ago | — | Miguel Canosa Co-Founder & Co-CEO | — | — | — | — |
| 13 | Soltec Developer of photo voltaic solar energy | $115M | 92 mo ago | 1,817 | — | SalesforceChart.jsApache HTTP Server+13 | 13 signals ▲160% Capital raise · Regulatory · Funding | — | — |
| 14 | Altano Energy Developer of solar and wind energy projects | $70M | 10 mo ago | 7 | — | WordPressMySQLPHP+17 | — | — | — |
| 15 | SolarMente Provider of solar panel installation services | $55M | 27 mo ago | 32 | Victor Gardrinier Co-Founder | WordPressMySQLPHP+30 | — | — | — |
| 16 | Alten Energias Renovables Independent solar power producer | $50M | 99 mo ago | 48 | Carlos Castellanos CEO | WordPressMySQLPHP+17 | — | — | — |
| 17 | Grenergy Developer of large scale PV energy systems and solar energy projects | $47M | 84 mo ago | 228 | — | WordPressMySQLPHP+16 | 43 signals ▲126% Contracts · Acquisition · Funding | — | 1 job opening · 1 expansion |
| 18 | Holaluz Power retailing company | $28M | 18 mo ago | 287 | Oriol Vila Co-Founder & CEO | Node.jsGoogle MapsVue.js+26 | — | — | — |
| 19 | Eranovum Provider of investment, development, construction, and operation of solar photovoltaic plants | $28M | 48 mo ago | — | Jose Aguirre Co-Founder | Cart FunctionalityWordPressMySQL+33 | — | — | 3 expansions |
| 20 | Ingenostrum Developer of solar and wind energy projects | $28M | 29 mo ago | — | Santiago Agundez CEO | WordPressMySQLPHP+14 | — | — | — |
| 21 | Gamma Solutions Provides installation and maintenance services for utility-scale solar projects | $24M | 104 mo ago | 95 | Jose Manuel Zorrilla Astudillo CEO | — | — | — | — |
| 22 | Solaria Independent power producer | $22M | 1 mo ago | 236 | Arturo Diaz Tejeiro CEO | WordPressPleskMySQL+16 | — | — | 1 expansion |
| 23 | Samara Provider of solar energy services | $19M | 21 mo ago | 78 | Iván Cabezuela Co-Founder | Node.jsTailwind CSSReact+16 | — | — | — |
| 24 | Nomad Solar Energy Provider of portable solar energy solutions, offering innovative products and services to bring clean energy… | $17M | 21 mo ago | — | Laurent De Thieulloy Founder | — | — | 5 patents Modular mounting and joining systems for mobile photovoltaic panel installations | — |
| 25 | EIDF Solar Developer of solar energy projects | $16M | 19 mo ago | 87 | — | WordPressMySQLPHP+30 | — | — | — |
| 26 | Sunhero Provider of solar panel installation services | $15M | 32 mo ago | 94 | Stefan Braun Co-Founder | SentryUnbounceTypeScript+24 | — | — | — |
| 27 | Eurener Solar photovoltaic modules manufacturer | $11M | 223 mo ago | — | — | WordPressMySQLPHP+20 | — | 2 patents Off-grid solar-powered autonomous lighting kits for outdoor illumination | — |
| 28 | Arena Power Developer of solar PV projects | $9M | 35 mo ago | 82 | — | WordPress Block EditorElementorWordPress+16 | — | — | — |
| 29 | Amelia Offering drone-powered data management and AI-driven analytics for solar energy | $6M | 3 mo ago | — | Bernardo Pereira Co-Founder & CEO | WordPressMySQLPHP+26 | — | — | 1 job opening |
| 30 | BSQ Solar HCPV Solar Project developer | $4M | 97 mo ago | — | Ignacio Luque Heredia CEO | — | — | — | — |
| 31 | Abora Manufacturer of hybrid solar panels | $2M | 18 mo ago | 52 52 → 35 (-33%) | Alejandro del Amo CEO | WordPressMySQLPHP+30 | — | — | — |
| 32 | DH Econergías Provider of heating systems that utilize renewable energy sources such as biomass and solar power | $1M | 80 mo ago | 27 | — | WordPressZohoMySQL+12 | — | — | — |
| 33 | Solaris Offgrid Manufacturer of solar-based charging devices | $1M | 74 mo ago | 30 | Thibault Lesueur Cofounder - Chief Commercial Officer | WixSentryBootstrap+14 | — | — | — |
| 34 | Solfy Online marketplace for self-consumption of solar energy, enabling individuals and businesses to produce their… | $1M | 9 mo ago | 8 | Guillermo Gallegos Co-Founder | WordPress Block EditorWordPressMySQL+35 | — | — | — |
| 35 | EndeF Engineering Solar panel installation company | $1M | 77 mo ago | 10 | Isabel Guedea Medrano CEO | WordPress Block EditorWordPressPlesk+23 | — | — | — |
| 36 | INDEREN Provider of solar panel installation services | $711K | 72 mo ago | 20 | — | WordPressPleskMySQL+25 | — | — | 1 job opening |
| 37 | Robinsun Portable and self-installable solar kits for households. | $623K | 16 mo ago | — | Boris Hageney Founder | Cart FunctionalityShopifyBootstrap+25 | — | — | 2 job openings |
| 38 | Rioglass Manufactures CSP and CPV components | $603K | 97 mo ago | 150 | — | WordPressMySQLPHP+10 | — | — | 1 partnership |
| 39 | SolarYou Provider of residential solar panel installation and related services | $509K | 13 mo ago | — | Jeronimo Lozano Crespo Co-Founder | WordPressMySQLPHP+42 | — | — | — |
| 40 | SIARQ Developer of solar lighting solutions with integrated environmental sensors | $483K | 93 mo ago | 15 | Alessandro Caviasca Co-Founder & CEO | — | — | — | — |
| 41 | Ournewenergy Advisory firm specializing in renewable energy Power Purchase Agreements (PPAs). | $319K | 89 mo ago | — | Estee Kessler Co-CEO & Coach | WordPressMySQLPHP+16 | — | — | — |
| 42 | Tewer Provider of engineering and technology solutions for the renewable energy industry | $114K | 56 mo ago | — | Marco Perez Founder & CEO | — | — | — | — |
| 43 | Capsun Developer of PV-Thermal systems and technology consultant for renewable energy plants | $113K | 82 mo ago | — | Jose Jimenez Co-Founder | — | — | — | — |
| 44 | Proton Future Developer of solar renewable energy power projects | $109K | 73 mo ago | 7 | Miquel Jove CEO | — | — | 22 patents Patents concentrated in health & consumer products | — |
| 45 | Elvere Solar Developer of solar energy projects | $109K | 113 mo ago | — | Isard Pisonero CEO | — | — | — | — |
Top 12 Solar 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
Series C · Madrid, Community of Madrid · founded 2021 · 7 employees$70.3Mraised▾
Developer of solar and wind energy projects
- Jul 2025Series C$70.3M
#3
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—
#4
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
#5
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
#6
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
#7
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
#8
Public · Pontevedra, Galicia · founded 2008 · 87 employees$15.9Mraised▾
Developer of solar energy projects
- Nov 2024Post IPO$15.9M
#9
Series B · Madrid, Community of Madrid · founded 2023$16.7Mraised▾
Nomad Solar Energy is a provider of portable solar energy solutions, offering innovative products and services to bring clean energy to various industries and sectors. The company designs and manufactures photovoltaic solutions to cater to off-grid and mobile energy needs, with a focus on decarbonization.
- Sep 2024Series B$16.7M
#10
Seed · Barcelona, Catalonia · founded 2022 · 8 employees$1.1Mraised▾
It is a company that operates as a marketplace for the self-consumption of solar energy. They provide personalized photovoltaic installation services for homes and businesses.
- Sep 2025Seed$4.7M
- Sep 2023Seed$1.1M
- 2022Seed$1.1M
#11
Series D · Badajoz, Extremadura · founded 2009 · 39 employees$172.1Mraised▾
Alter Enersun is a turnkey solution provider for distributed-scale solar energy projects. Offers multiple solutions for installation, commissioning, operation, and maintenance of solar PV projects. Developed multi-scale solar projects in Andalusia, Catalonia, Mexico, Portuguese etc., with a total capacity of more than 5MW power. Client portfolio includes companies like Airbus Military, Spain, University of Murcia, Barcelona city council, the city council of Coria and RCDE, Spain etc.
- Dec 2023Series D$172.1M
#12
Acquired · Madrid, Community of Madrid · founded 2006 · 200 employees$392Mraised▾
Developer of utility scale renewable energy solutions
- Jun 2022Conventional Debt$42M
- Jan 2018Conventional Debt—
- Jul 2008Conventional Debt$350M
Funding & investor landscape
Notable founders
How research on Solar Photovoltaics is moving in Spain
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 1,233 Spain-affiliated papers.
- Universidad Politécnica de Madrid124
- Universitat Politècnica de Catalunya78
- Universitat Jaume I73
- Universidad de Sevilla62
- Universitat Politècnica de València48
- Photovoltaic system5→78
- Solar energy1→55
- Thermal energy storage1→21
- Solar cell9→28
- Perovskite (structure)10→28
- Solar energy3→177
- Photovoltaic system11→182
- Renewable energy4→122
- Thermal energy storage1→52
- Solar cell13→62
- Solar energy3→42
- Photovoltaic system4→42
- Renewable energy1→26
- Electricity1→9
- Process engineering1→8
Where solar pv 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.