Radar Landscapes Energy Landscape of Spain
Energy industry in Spain — illustrated cover for the Energy Landscape of Spain
Radar · Industry landscape · Spain

Energy Landscape of Spain

1,173 Energy companies in Spain, in one picture: who is hiring, who is raising money, who founded them, where they are based, what the news is about, which skills employers want and where the research is going. Updated August 2026.

1,173companies tracked
$8.8Bdisclosed funding
59hiring right now
877events · 24 months
≥188,113news articles · 12 months

Who leads Energy in Spain

Tracks 1,173 Spanish energy firms, highlighting which are currently hiring, the most funded, and those receiving the most media coverage.

open roles
Hiring now
ranked by live open roles
  1. 01Siemens Gamesa7last posted Jun 2026
  2. 02Progressum5last posted May 2026
  3. 03Enertis Applus+4last posted May 2026
  4. 04Ventis wind service4last posted Apr 2026
  5. 05Matrix Renewables4last posted Apr 2026
  6. 06Global Inspection Services3last posted Jun 2026
  7. 07Greenalia3last posted Jul 2026
  8. 08Zelestra3last posted Jun 2026
59 companies hiring · 0 posted in the last 30 days
disclosed funding
Most funded
disclosed totals, all rounds
  1. 01Atlantica Yield$1.9BConventional Debt · Jun 2018
  2. 02NORTEGAS$1.6BConventional Debt · Sep 2017
  3. 03T-Solar$629.6MConventional Debt · Jan 2020
  4. 04Solaria$528.9MPost IPO · Apr 2026
  5. 05X-Elio$475.6MConventional Debt · Jul 2021
  6. 06Vela Energy$445.8MConventional Debt · Jul 2016
  7. 07EDP Renewables$408.1MGrant (prize money) · Feb 2023
  8. 08Fotowatio Renewable Ventures$392MConventional Debt · Jun 2022
116 companies with disclosed rounds · $8.8B total
revenue
Revenue leaders
official filings first, else latest snapshot
  1. 01Repsol$67.4BFY2021 filing
  2. 02Iberdrola$58.6BFY2023 filing
  3. 03Nippon Gases$126.1MFY2025 filing
  4. 04Matrix Renewables$3.5MFY2023 filing
4 companies with a revenue figure
headcount
Largest teams
ranked by tracked headcount
  1. 01Iberdrola40,721tracked employees
  2. 02COBRA Group36,000tracked employees
  3. 03Repsol24,226tracked employees
  4. 04Gas Natural Fenosa15,374tracked employees
  5. 05Abengoa12,468tracked employees
  6. 06cepsa10,310tracked employees
  7. 07Técnicas Reunidas8,212tracked employees
  8. 08Naturgy7,090tracked employees
58 companies with headcount data
share of events
Share of voice
share of all tracked sector news events, 24 months
  1. 01Iberdrola19.2%129 tracked events
  2. 02Repsol14.9%100 tracked events
  3. 03Siemens Gamesa10.8%73 tracked events
  4. 04Endesa7.6%51 tracked events
  5. 05Turbo Energy7.3%49 tracked events
  6. 06Naturgy5.9%40 tracked events
  7. 07Grenergy4.6%31 tracked events
  8. 08Soltec3.0%20 tracked events
673 tracked events across 60 companies
web reach
Most-used apps
the sites in this sector the web visits most
  1. 01Endesatop 100kendesa.com
  2. 02Simontop 500ksimonelectric.com
  3. 03Wccsolartop 500kwccsolar.net
  4. 04Iberdrolatop 500kiberdrola.com
  5. 05Siemens Gamesatop 500ksiemensgamesa.com
  6. 06Red Electrica de Espanatop 500kree.es
  7. 07nedgiatop 500knedgia.es
  8. 08Repsoltop 500krepsol.com
334 companies here run a site with a measured audience · 27 of them sit inside the web’s top million
articles
In the news
Prism news coverage, last 12 months
  1. 01Iberdrola≥232articles in the window
  2. 02Repsol≥213articles in the window
  3. 03Siemens Gamesa≥46articles in the window
  4. 04Naturgy≥43articles in the window
  5. 05ACCIONA≥42articles in the window
  6. 06Grenergy≥29articles in the window
  7. 07Endesa≥29articles in the window
  8. 08Abengoa≥9articles in the window
21 of these companies drew sector coverage in the window
Radar

See all 1,173 Energy companies in Spain

Filter by funding, headcount, hiring and location, and export the list.

How the Energy ecosystem in Spain grew, 2016–2025

Shows the number of energy companies founded each year, peaking at 63 in 2020 and dropping to zero in 2025.

Companies founded / year
new Energy companies in Spain
2016: 342017: 412018: 442019: 462020: 632021: 392022: 292023: 182024: 52025: 0
20162025
peak 63 in 2020
Companies raising / year
with a disclosed round that year
20162025
peak 24 in 2017
Disclosed funding / year
sum of disclosed rounds (USD)
2016: 469,877,2022017: 1,868,510,2462018: 1,407,953,0492019: 239,540,3752020: 760,796,6942021: 483,448,9412022: 147,515,5472023: 577,673,5892024: 382,539,6202025: 453,316,699
20162025
peak $1.9B in 2017

Where Energy companies in Spain are based

Lists the cities with the highest concentration of energy firms, led by Madrid with 228 companies.

Madrid skyline — Energy hub in Spain
Hub 01
Madrid
228 Energy companies
55% of the Energy companies across these hubs
228companies
$4Bdisclosed funding
20hiring now
Photo Wikipedia · Madrid · CC BY-SA 4.0
Barcelona skyline — Energy hub in Spain
Hub 02
Barcelona
74 Energy companies
18% of the Energy companies across these hubs
74companies
$108.8Mdisclosed funding
1hiring now
Photo Wikipedia · Barcelona · CC BY-SA 4.0
Valencia skyline — Energy hub in Spain
Hub 03
Valencia
33 Energy companies
8% of the Energy companies across these hubs
33companies
$286.4Mdisclosed funding
2hiring now
Photo Wikipedia · Valencia · CC BY-SA 4.0
Seville skyline — Energy hub in Spain
Hub 04
Seville
25 Energy companies
6% of the Energy companies across these hubs
25companies
$1.9Bdisclosed funding
Photo Wikipedia · Seville · CC BY-SA 4.0
Zaragoza skyline — Energy hub in Spain
Hub 05
Zaragoza
19 Energy companies
5% of the Energy companies across these hubs
19companies
$3.5Mdisclosed funding
2hiring now
Photo Wikipedia · Zaragoza · CC BY-SA 4.0
Bilbao, a Energy hub in Spain
Hub 06
Bilbao
14 Energy companies
3% of the Energy companies across these hubs
14companies
$1.6Bdisclosed funding
generated artwork
Pamplona, a Energy hub in Spain
Hub 07
Pamplona
13 Energy companies
3% of the Energy companies across these hubs
13companies
$6.3Mdisclosed funding
2hiring now
generated artwork
Granada skyline — Energy hub in Spain
Hub 08
Granada
11 Energy companies
3% of the Energy companies across these hubs
11companies
1hiring now
Photo Wikipedia · Granada · CC BY-SA 4.0

Funding, M&A and the deals moving Energy in Spain

Counts 877 corporate events over the past two years, including asset acquisitions, contracts, announcements, earnings releases, and mergers.

Assets 207Contracts 182Announcement 88Earnings 88M&A 70Leadership 56Funding 47Capital 37Regulatory 35Lawsuit 28
  • IPOThe Asturian engineering company TSK, based in Gijón, has already obtained the support of several investors that will cover at least 40% of the public offer of share subscription (OPS) that the company will make as a pre-pass for its departure to the Stock Exchange, scheduled for the middle of the next month of May.2026-04-29
  • FundingMatrix Renewables, a renewable energy developer and independent power producer focused on solar and battery energy storage systems, has secured £245 million (~$332 million) in non-recourse financing.2026-04-29
  • M&AIn 2024, the utility completed the sale of a 55% stake in its Mexican energy assets to Mexico Infrastructure Partners for $6 billion, following an agreement announced in February 2023.2026-04-28
  • M&ASpanish gas grid operator Enagas said on Tuesday it had reached an agreement with Singapore sovereign wealth fund GIC to buy its 31.5% stake in French gas grid operator Terega for 573 million euros ($674.65 million).2026-04-22
  • M&Athe Spanish manager of the gas system has announced the sale of 40% of Enagás Renovable to Hy24 (an investment fund of Ardian) for an amount of 48 million euros, although it will retain 20% of the subsidiary.2026-04-21
  • FundingThe HoldCo financing was closed with Nomura, acting as mandated lead arranger and underwriter.2026-04-20
  • FundingBasquevolt, a Spanish company specializing in next-generation solid-state battery technology, has announced the entry of Axon Partners Group, through its ClimateTech investment strategy supported by Ventures EPM, into its shareholding structure as an investor, together with complementary public funding through a CDTI (Centre for the Development of Technology and Innovation) with its SICC Innvierte match‑funding scheme.2026-04-20
  • Fundingdeveloper Solarig announced plans to invest more than €300m ($354m) into developing at least 20 biomethane plants in the country by 2030.2026-04-15
  • M&ALast March, along with partners, it struck a deal with Siemens Gamesa, the wind power subsidiary of Siemens Energy, to buy a majority stake in its onshore wind turbine generator manufacturing business in India and Sri Lanka for $550 million2026-04-06
  • M&AOther interested parties in the 51% stake include BP, Repsol, and Chevron.2026-04-03

Mergers and acquisitions

Deals from the last 24 months where a Energy company in Spain was the buyer or the one bought, newest first. “Undisclosed” means the price was never published — not that the deal was worth nothing.

AcquirerTargetDeal valueStatusDate
mexico infrastructure partnersIberdrola$6BCompleted2026-04-28
cox groupIberdrola$4.2BAnnounced2026-04-27
EnagasteregaundisclosedAnnounced2026-04-22
hy24Enagás RenovableundisclosedAnnounced2026-04-21
IberdrolaneoenergiaundisclosedAnnounced2026-04-10
technique solaireIberdrolaundisclosedCompleted2026-04-10

Who is listing, hiring leaders, launching and winning work

Details specific event types such as IPO filings, leadership changes, product launches, and contract wins.

IPO pipeline
3 companies listed or filing · last 24 months
Leadership moves
27 tracked people moves · last 12 months
  • EndesaGianni Vittorio Armani · Appointment → Chief Executive OfficerMay 2026
  • EndesaJosé Bogas · Resignation → Non-Executive DirectorMay 2026
  • SoltecAlma Miller · Appointment → Executive Vice President of Strategic PartnershipsApr 2026
  • SoltecAlejandro Moreno · Appointment → President of North AmericaApr 2026
  • EndesaNa · Resignation — was Chief Executive OfficerApr 2026
  • DiverxiaAlma Roxas-Aguila · Appointment → Country HeadApr 2026
  • cupa groupFernando Bandrés Diéguez · Appointment → Director of Strategic DevelopmentApr 2026
  • RepsolNatalia Barreiro · AppointmentMar 2026
Product launches
tracked launches · last 12 months
  • RepsolDiesel Nexa (Fuel)Dec 2025
  • Repsolintelligent agent construction platform (AI platform)Oct 2025
  • IberdrolaDigital cloud-hosted platform (Digital Platform)Sep 2025
Contract wins
99 customer wins · last 24 months
Workforce actions
5 companies cutting roles · last 24 months
  • Siemens Gamesa~600 roles reported · price declineApr 2026
  • Duro Felguera~500 roles reported · cost reductionOct 2025
  • Grenergyscale undisclosedMay 2025
  • Holaluz~80 roles reported · teleworking eliminationFeb 2025
  • Repsol~1,500 roles reportedJan 2025
Regulatory & litigation
40 regulatory events · 16 tracked suits · 24 months
  • Iberdrolaapproved for saleApr 2026
  • Iberdrolasale of subsidiary approved — Spanish authoritiesApr 2026
  • Repsollicenses granted — United StatesApr 2026
  • IberdrolaApproval — CNMVMar 2026
  • EASAE, ACIH v BP, moeve, repsolpossible price policy agreements and abuse of dominant positionApr 2026
  • Unnamed investor class v eos energySevere misleading statements and failure to disclose financial guidance in violation of fe · FiledApr 2026
Earnings pulse
companies reporting results · last 24 months
21 companies reporting90 company-quarters trackedbeat 7miss 0in line 2

Half of these companies grew revenue faster than +4.0%, half slower.

Who is building Energy in Spain

Profiles 264 founders and CEOs across 208 companies, noting their most common alma maters like INSEAD and Imperial College London.

Founders and chief executives12 of 264, from the best-funded companies on this page
Marta Martinez
CEO
Marta Martinez

University of Vigo.

Lluis Noguera
Chief Executive Officer
Lluis Noguera

Brookfield Asset Management, ex-Global Power Generation, ex-Gas Natural Fenosa, Universitat Politècnica de Catalunya, 2003

Inigo Olaguibel
CEO
Inigo Olaguibel

Ex-CEO Vela Energy, Banco Santander. Comillas Pontifical University 1993

Sandhya Ganapathy
Chief Executive Officer
Sandhya Ganapathy

Edp Renewables, ex-Icici Bank, ex-Standard Chartered Bank, University College Of Teacher Education, Vocational Higher Secondary School Campus…

Borja Benjumea
Co-Founder & COO
Borja Benjumea

Ex-Squire Sanders& Dempey. Comillas Pontifical University 2001

Juan Guaita
Founder
Juan Guaita

INNOVA INDUSTRIAL DESIGN, ALL SPANISH, ex-Founder Union of Solar Projects. Fridericiana University of Karlsruhe 1996

Luis Cid Suarez
CEO
Luis Cid Suarez

Ex-Iberdrola Engineering and Construction. Comillas Pontifical University BSc & MSc 2005

Victor Gardrinier
Co-Founder
Victor Gardrinier

Co-Founder Solarmente, ex-Co-Founder YEP - Entrepreneurship HEC, Microsoft. HEC Montréal 2017

Carlos Castellanos
CEO
Carlos Castellanos

ex-GBS Finanzas, Deutsche Bank. IESE Business School - University of Navarra 2001

Carlota Pi Amoros
Co-Founder & CEO & CMO
Carlota Pi Amoros

Breakthrough Energy, ex-Nexus Energía, RWE.Polytechnic University of Catalonia BE 2001 & Master 2002, IESE Business School EMBA 2009

Guy Yames
Co-Founder
Guy Yames

Ex-CEOBelectric Israel, Sovna, Belectric, Enigma, Tikshoov. Tel Aviv University BA 2000, University of Haifa MBA 2006.

Jose Manuel Zorrilla Astudillo
CEO
Jose Manuel Zorrilla Astudillo

Founder & CEO Diggia, ex-Gamma Solutions, Arthur Andersen. ESIC Business & Marketing School 1997

Where the founders studied
alma mater on record for 11 of 264 founders
INSEAD2
Imperial College London2
Massachusetts Institute of Technology1
Universidad Politécnica de Madrid1
Universitat Politècnica de Catalunya1
Universitat de Barcelona1
Erasmus University Rotterdam1
ESIC Business & Marketing School1
Radar

Look up the people behind Energy companies in Spain

Search founders, executives and operators by company, role and location.

Who funds Energy in Spain

Records 279 funding rounds since 2016 from 132 investors, with a typical round size of $424 k.

Investor · most active investors since 2016RoundsLedLatest
Europa148Feb 2025
EIC Fund241Sep 2023
Ship2B54Jan 2024
CDTI5Mar 2026
EIT InnoEnergy31Jul 2023
Santander31Dec 2023
BBVA31Dec 2023
Seaya31Jun 2024
Pelion Green Future31Jun 2024
Repsol3Oct 2025
Stage mix · rounds since 2016
Seed & Angel47
Series A–B19
Series C+ / PE7
Grants, debt & other206

The typical round is $424k — half were bigger, half smaller.

The biggest Energy funding rounds in Spain

Highlights the largest disclosed round—Alter Enersun’s $172.1 M Series D—and lists ten other large recent rounds.

CompanyRoundSizeWhenBackers
Alter EnersunSeries D$172.1MDec 2023Caixa Bank, Santander, BBVA
Altano EnergySeries C$70.3MJul 2025M&G, Pioneer Point Partners
SolarMenteSeed$55.1MApr 2023GNE Finance
Oryx PowerSeries C$45.4MFeb 2022Global Realty Capital
EranovumSeries B$27.6MJun 2022Keystone Capital
IngenostrumSeries B$27.6MDec 2023Andera Partners
SolariaSeries B$22MSep 2006Q-Cells, Sigma Partners, NGEN Partners +1 more
CUBIERTA SOLARSeed$17.7MJul 2023FIEE SGR
Nomad Solar EnergySeries B$16.7MSep 2024TiLT Capital Partners
BasquevoltSeries A$10.9MMar 2025Ekarpen, Stellum Capital, CDTI
Venture round sizes · 2023–2025
<$1M4
$1–10M6
$10–50M5
$50–250M3
>$250M0

18 venture rounds with a disclosed amount in the window.

Fresh cheques · last 6 months
  • SolariaPost IPO$351MApr 2026
  • AmeliaSeries A$5.8MMar 2026
  • AmeliaGrant (prize money)undisclosedMar 2026
  • AmeliaConventional DebtundisclosedMar 2026
  • BasquevoltSeries AundisclosedFeb 2026

What the news says about Energy in Spain

Indexes 188,113 news articles from the last year, showing the most covered topics such as geopolitical disputes and international sports competitions.

News volume
Energy coverage across Spain · articles per quarter
2021Q2: 26,7732021Q3: 28,9982021Q4: 23,9292022Q1: 26,9942022Q2: 30,1142022Q3: 30,8422022Q4: 37,1512023Q1: 37,9982023Q2: 35,4512023Q3: 40,2602023Q4: 31,8052024Q1: 38,9812024Q2: 44,5672024Q3: 48,1602024Q4: 46,8502025Q1: 56,1762025Q2: 39,5052025Q3: 94,2642025Q4: 25,6542026Q1: 31,923
2021Q22026Q1
peak ≥94,264 in 2025Q3 · ≥188,113 articles in the last 12 tracked months
Tone of coverage
share of articles by dominant sentiment (positive / neutral / negative)
202120232025
Positive-tone share moved 51% → 43%, negative 26% → 17% across 2021–2025.

What the coverage is about

The subjects that dominate Energy news in Spain. The arrow shows whether each one is being written about more or less than a year ago.

  • Geopolitical disputes and contested areas≥300,767▲+33%
  • International and transnational geographic entities≥300,761▲+33%
  • Administrative and political subdivisions≥300,732▲+33%
  • International sports competitions≥39,846▼-34%
  • Sports history and legacy stories≥26,449▲+618%
  • Professional league updates≥26,350→+4%
  • Sportsmanship and ethics in sports≥24,060▲+1264%
  • Olympic games coverage≥17,597▼-64%
  • Athlete transfer rumors≥17,148▲+12%
  • Championship event highlights≥16,849▼-20%
Most-covered companies · last 12 months

21 Energy companies here were named in the news over this period.

Prism

Watch Energy coverage in Spain as it happens

Prism follows these subjects story by story — which companies are named, what is said about them and how the tone moves.

Momentum

The words getting louder — and quieter

Which terms are showing up in more stories than a year ago, and which are fading. The percentage is the change in how many articles mention them.

countries+133%geopolitical alliances+94%foreign policy analysis+252%diplomatic strategies+65%multilateral diplomacy+220%fire impact study+161%extreme temperature advisory+243%prolonged high temperatures+241%wildfire control+91%diplomatic engagements+57%
europa league-65%olympic trials-90%olympic team selections-84%quarterfinals-67%ronaldo-39%

The pressures the press keeps returning to

Three recurring angles in Spain Energy coverage, and whether each is getting more attention year on year (through 2025).

Regulatory Risk ▲ rising
≥592,499 articles touch this dimension · 13.1% critical tone
20212025
signals: territories, disputed islands, countries
Funding Momentum ▲ rising
≥44,616 articles touch this dimension · 31.9% critical tone
20212025
signals: club valuation, europa league, quarterfinals
Growth ▲ rising
≥89,870 articles touch this dimension · 25.8% critical tone
20212025
signals: league expansion news, gdp growth rate, pro league fixtures

Energy jobs in Spain: who is hiring and what they ask for

Aggregates 15 job postings from 39 employers over the past year, indicating the skills most frequently requested.

15postings · last 12 months
45postings tracked overall
39employers advertising
Most advertised titles
  • Underwriter Energy3
  • Sales Manager | Energy Industry | Spain2
  • Senior Recruitment Consultant - Renewable Energy (Italian Speaking)2
  • Principal Trader Energy Marketing2
  • Procurement Manager – Renewable Energy2
  • Energy Markets Manager2

What Energy research is working on

Summarizes 53,205 academic papers, dividing them into identified problems, cautions, and opportunities.

How this field talks about itself
Energy papers (gold) against all published research (grey)
Promising47.6% · 37.2%1.3×
Breakthrough30.9% · 26.0%1.2×
Descriptive8.1% · 17.4%0.5×
Problem-identifying7.0% · 9.7%0.7×
Comparative3.8% · 4.1%≈ par
Cautionary2.4% · 4.6%0.5×
How the work is done
Methods-led61.2%
Empirical22.3%
Reviews14.5%
Position pieces1.6%
Theoretical0.4%
How the research reads

96% positive · 3% neutral · 1% negative, across 53,205 papers.

The institutions behind the field
  • Chinese Academy of Sciences132k
  • Tsinghua University74k
  • Nanyang Technological University61k
  • University of California, Los Angeles45k
  • The University of Texas at Austin44k
  • Nankai University36k

ranked by how often their work is cited

Researchers who shaped it

Bruce Dunn · Patrice Simon · Jean‐Marie Tarascon · Yury Gogotsi · Yang‐Kook Sun · Haresh Kamath · Arumugam Manthiram · Yi Cui

The most-cited breakthroughs
  • Supercapacitor Devices Based on Graphene Materials · 3k cites
  • Graphene Anchored with Co<sub>3</sub>O<sub>4</sub> Nanoparticles as Anode of Lithium Ion Batteries with Enhanced Reversible Capacity and Cyclic Perfor · 2k cites
  • Challenges and Prospects of Lithium–Sulfur Batteries · 2k cites
  • Nitrogen-doped mesoporous carbon of extraordinary capacitance for electrochemical energy storage · 2k cites
  • Electrochemical Na Insertion and Solid Electrolyte Interphase for Hard‐Carbon Electrodes and Application to Na‐Ion Batteries · 2k cites
Common problems researchers identify3,636 papers · 7 recurring themes
Energy Storage System Challenges — Common problems researchers identify
Problems · theme 01
Energy Storage System Challenges
738 papers · 20.3% of this block
2022: 1,168 of every 10,000 papers on this subject2023: 1,254 of every 10,000 papers on this subject2024: 1,170 of every 10,000 papers on this subject2025: 1,524 of every 10,000 papers on this subject2022: 1,168 of every 10,000 papers on this subject2023: 1,254 of every 10,000 papers on this subject2024: 1,170 of every 10,000 papers on this subject2025: 1,524 of every 10,000 papers on this subject▲ +30% share2022→2025 share of research on this subject
Researchers discuss barriers and impacts of various storage technologies for future power grids.
Energy storage · Renewable energy · Environmental economics · Energy
“Comparative Review of Energy Storage Systems, Their Roles, and Impacts on Future Power Systems”
738 of these papers raise it as a problem
Battery Electrode Material Issues — Common problems researchers identify
Problems · theme 02
Battery Electrode Material Issues
617 papers · 17.0% of this block
2022: 481 of every 10,000 papers on this subject2023: 469 of every 10,000 papers on this subject2024: 424 of every 10,000 papers on this subject2025: 501 of every 10,000 papers on this subject2022: 481 of every 10,000 papers on this subject2023: 469 of every 10,000 papers on this subject2024: 424 of every 10,000 papers on this subject2025: 501 of every 10,000 papers on this subject▲ +4% share2022→2025 share of research on this subject
Papers highlight difficulties in developing reliable anode and cathode materials for rechargeable batteries.
Anode · Cathode · Energy storage · Battery
“Developing Cathode Materials for Aqueous Zinc Ion Batteries: Challenges and Practical Prospects”
617 of these papers raise it as a problem
Lithium and Flow Battery Limits — Common problems researchers identify
Problems · theme 03
Lithium and Flow Battery Limits
557 papers · 15.3% of this block
2022: 59 of every 10,000 papers on this subject2023: 60 of every 10,000 papers on this subject2024: 72 of every 10,000 papers on this subject2025: 80 of every 10,000 papers on this subject2022: 59 of every 10,000 papers on this subject2023: 60 of every 10,000 papers on this subject2024: 72 of every 10,000 papers on this subject2025: 80 of every 10,000 papers on this subject▲ +36% share2022→2025 share of research on this subject
Studies examine performance ceilings and safety concerns of lithium‑ion and flow battery technologies.
Battery · Energy storage · Lithium · Flow battery
“Electrical energy storage for transportation—approaching the limits of, and going beyond, lithium-ion batteries”
557 of these papers raise it as a problem
Electrolyte Design Obstacles — Common problems researchers identify
Problems · theme 04
Electrolyte Design Obstacles
442 papers · 12.2% of this block
2022: 526 of every 10,000 papers on this subject2023: 533 of every 10,000 papers on this subject2024: 454 of every 10,000 papers on this subject2025: 528 of every 10,000 papers on this subject2022: 526 of every 10,000 papers on this subject2023: 533 of every 10,000 papers on this subject2024: 454 of every 10,000 papers on this subject2025: 528 of every 10,000 papers on this subject→ +0% share2022→2025 share of research on this subject
Works focus on interfacial stability and conductivity problems in high‑energy electrolytes.
Electrolyte · Fast ion conductor · Lithium · Electrochemistry
“Electrolyte-Additive-Driven Interfacial Engineering for High-Capacity Electrodes in Lithium-Ion Batteries: Promise and Challenges”
442 of these papers raise it as a problem
Renewable‑Grid Integration Hurdles — Common problems researchers identify
Problems · theme 05
Renewable‑Grid Integration Hurdles
436 papers · 12.0% of this block
2022: 1,731 of every 10,000 papers on this subject2023: 1,851 of every 10,000 papers on this subject2024: 1,699 of every 10,000 papers on this subject2025: 2,357 of every 10,000 papers on this subject2022: 1,731 of every 10,000 papers on this subject2023: 1,851 of every 10,000 papers on this subject2024: 1,699 of every 10,000 papers on this subject2025: 2,357 of every 10,000 papers on this subject▲ +36% share2022→2025 share of research on this subject
Analyses address technical and operational challenges of coupling renewables with electric power systems.
Renewable energy · Photovoltaic system · Grid · Electricity
“A Review of Hybrid Renewable/Alternative Energy Systems for Electric Power Generation: Configurations, Control, and Applications”
436 of these papers raise it as a problem
Supercapacitor Material Constraints — Common problems researchers identify
Problems · theme 06
Supercapacitor Material Constraints
431 papers · 11.9% of this block
2022: 4,848 of every 10,000 papers on this subject2023: 4,697 of every 10,000 papers on this subject2024: 4,778 of every 10,000 papers on this subject2025: 3,583 of every 10,000 papers on this subject2022: 4,848 of every 10,000 papers on this subject2023: 4,697 of every 10,000 papers on this subject2024: 4,778 of every 10,000 papers on this subject2025: 3,583 of every 10,000 papers on this subject▼ -26% share2022→2025 share of research on this subject
Research points to scalability and performance limits of nanostructured supercapacitor components.
Supercapacitor · Nanotechnology · Energy storage · Electrochemical energy storage
“Flexible and Stretchable Energy Storage: Recent Advances and Future Perspectives”
431 of these papers raise it as a problem
Hydrogen Storage Difficulties — Common problems researchers identify
Problems · theme 07
Hydrogen Storage Difficulties
415 papers · 11.4% of this block
2022: 317 of every 10,000 papers on this subject2023: 334 of every 10,000 papers on this subject2024: 327 of every 10,000 papers on this subject2025: 360 of every 10,000 papers on this subject2022: 317 of every 10,000 papers on this subject2023: 334 of every 10,000 papers on this subject2024: 327 of every 10,000 papers on this subject2025: 360 of every 10,000 papers on this subject▲ +13% share2022→2025 share of research on this subject
Literature surveys technical and economic barriers to widespread hydrogen storage adoption.
Hydrogen storage · Hydrogen · Thermal energy storage · Energy storage
“Hydrogen Storage Technologies for Future Energy Systems”
415 of these papers raise it as a problem
Cautions1,184 papers · 7 recurring themes
Economic Viability of Storage — Cautions
Cautions · theme 01
Economic Viability of Storage
261 papers · 22.0% of this block
2022: 1,414 of every 10,000 papers on this subject2023: 1,500 of every 10,000 papers on this subject2024: 1,372 of every 10,000 papers on this subject2025: 1,830 of every 10,000 papers on this subject2022: 1,414 of every 10,000 papers on this subject2023: 1,500 of every 10,000 papers on this subject2024: 1,372 of every 10,000 papers on this subject2025: 1,830 of every 10,000 papers on this subject▲ +29% share2022→2025 share of research on this subject
Authors caution that cost‑benefit analyses often reveal limited financial returns for storage projects.
Energy storage · Renewable energy · Environmental economics · Electricity
“Development of Energy Storage Systems for Power Network Reliability: A Review”
261 of these papers raise it as a problem
Grid Stability with Renewables — Cautions
Cautions · theme 02
Grid Stability with Renewables
216 papers · 18.2% of this block
2022: 1,731 of every 10,000 papers on this subject2023: 1,851 of every 10,000 papers on this subject2024: 1,699 of every 10,000 papers on this subject2025: 2,357 of every 10,000 papers on this subject2022: 1,731 of every 10,000 papers on this subject2023: 1,851 of every 10,000 papers on this subject2024: 1,699 of every 10,000 papers on this subject2025: 2,357 of every 10,000 papers on this subject▲ +36% share2022→2025 share of research on this subject
Studies warn of potential instability and reliability issues when integrating variable renewable sources.
Renewable energy · Photovoltaic system · Grid · Electricity
“Impacts of Renewable Energy Integration on Power System Stability”
216 of these papers raise it as a problem
Thermal Storage Material Risks — Cautions
Cautions · theme 03
Thermal Storage Material Risks
201 papers · 17.0% of this block
2022: 186 of every 10,000 papers on this subject2023: 191 of every 10,000 papers on this subject2024: 183 of every 10,000 papers on this subject2025: 247 of every 10,000 papers on this subject2022: 186 of every 10,000 papers on this subject2023: 191 of every 10,000 papers on this subject2024: 183 of every 10,000 papers on this subject2025: 247 of every 10,000 papers on this subject▲ +33% share2022→2025 share of research on this subject
Papers highlight durability and safety concerns of latent‑heat and sorption thermal storage materials.
Thermal energy storage · Energy storage · Thermal · Latent heat
“Sorption heat storage for long-term low-temperature applications: A review on the advancements at material and prototype scale”
201 of these papers raise it as a problem
Alternative Battery Chemistry Concerns — Cautions
Cautions · theme 04
Alternative Battery Chemistry Concerns
182 papers · 15.4% of this block
2022: 811 of every 10,000 papers on this subject2023: 815 of every 10,000 papers on this subject2024: 718 of every 10,000 papers on this subject2025: 847 of every 10,000 papers on this subject2022: 811 of every 10,000 papers on this subject2023: 815 of every 10,000 papers on this subject2024: 718 of every 10,000 papers on this subject2025: 847 of every 10,000 papers on this subject▲ +4% share2022→2025 share of research on this subject
Research raises questions about safety, lifespan, and scalability of non‑lithium battery chemistries.
Anode · Cathode · Electrolyte · Lithium
“Electrode Materials for Rechargeable Sodium‐Ion Batteries: Potential Alternatives to Current Lithium‐Ion Batteries”
182 of these papers raise it as a problem
Nanostructured Supercapacitor Safety — Cautions
Cautions · theme 05
Nanostructured Supercapacitor Safety
142 papers · 12.0% of this block
2022: 1,037 of every 10,000 papers on this subject2023: 986 of every 10,000 papers on this subject2024: 879 of every 10,000 papers on this subject2025: 942 of every 10,000 papers on this subject2022: 1,037 of every 10,000 papers on this subject2023: 986 of every 10,000 papers on this subject2024: 879 of every 10,000 papers on this subject2025: 942 of every 10,000 papers on this subject▼ -9% share2022→2025 share of research on this subject
Works point out electrochemical and mechanical reliability issues in emerging nanomaterial supercapacitors.
Supercapacitor · Capacitance · Electrochemistry · Nanotechnology
“Progress and Perspectives on Promising Covalent‐Organic Frameworks (COFs) Materials for Energy Storage Capacity”
142 of these papers raise it as a problem
Battery Thermal Runaway Risks — Cautions
Cautions · theme 06
Battery Thermal Runaway Risks
117 papers · 9.9% of this block
2022: 69 of every 10,000 papers on this subject2023: 71 of every 10,000 papers on this subject2024: 49 of every 10,000 papers on this subject2025: 71 of every 10,000 papers on this subject2022: 69 of every 10,000 papers on this subject2023: 71 of every 10,000 papers on this subject2024: 49 of every 10,000 papers on this subject2025: 71 of every 10,000 papers on this subject▲ +4% share2022→2025 share of research on this subject
Analyses focus on overheating, state‑of‑charge effects, and mitigation strategies for battery safety.
Battery · Thermal runaway · Energy storage · State of charge
“Studying Abuse Testing on Lithium-Ion Battery Packaging for Energy Storage Systems”
117 of these papers raise it as a problem
Vanadium Flow Battery Degradation — Cautions
Cautions · theme 07
Vanadium Flow Battery Degradation
65 papers · 5.5% of this block
2022: 231 of every 10,000 papers on this subject2023: 223 of every 10,000 papers on this subject2024: 198 of every 10,000 papers on this subject2025: 257 of every 10,000 papers on this subject2022: 231 of every 10,000 papers on this subject2023: 223 of every 10,000 papers on this subject2024: 198 of every 10,000 papers on this subject2025: 257 of every 10,000 papers on this subject▲ +11% share2022→2025 share of research on this subject
Studies discuss electrolyte imbalance and efficiency loss in vanadium redox flow systems.
Flow battery · Redox · Vanadium · Electrolyte
“Vanadium redox flow battery capacity loss mitigation strategy based on a comprehensive analysis of electrolyte imbalance effects”
65 of these papers raise it as a problem
Opportunities39,303 papers · 7 recurring themes
Optimized Storage for Renewable Grids — Opportunities
Opportunities · theme 01
Optimized Storage for Renewable Grids
1,378 papers · 23.0% of this block
2022: 1,258 of every 10,000 papers on this subject2023: 1,337 of every 10,000 papers on this subject2024: 1,295 of every 10,000 papers on this subject2025: 1,710 of every 10,000 papers on this subject2022: 1,258 of every 10,000 papers on this subject2023: 1,337 of every 10,000 papers on this subject2024: 1,295 of every 10,000 papers on this subject2025: 1,710 of every 10,000 papers on this subject▲ +36% share2022→2025 share of research on this subject
Research explores algorithms and designs that enhance storage performance in renewable‑rich power networks.
Energy storage · Renewable energy · Energy · Wind power
“Battery Energy Storage Optimization in Distribution Power Systems with Distributed Renewable Energy Resources”
Advanced Electrolyte‑Electrode Interfaces — Opportunities
Opportunities · theme 02
Advanced Electrolyte‑Electrode Interfaces
1,364 papers · 22.7% of this block
2022: 811 of every 10,000 papers on this subject2023: 815 of every 10,000 papers on this subject2024: 718 of every 10,000 papers on this subject2025: 847 of every 10,000 papers on this subject2022: 811 of every 10,000 papers on this subject2023: 815 of every 10,000 papers on this subject2024: 718 of every 10,000 papers on this subject2025: 847 of every 10,000 papers on this subject▲ +4% share2022→2025 share of research on this subject
Papers propose novel electrolyte formulations that improve durability and capacity of next‑generation batteries.
Cathode · Electrolyte · Anode · Electrochemistry
“Phosphated Electrolyte Enabling Dual Robust Electrode–Electrolyte Interfacial Reconstruction Toward Capable Zn Metal Batteries”
High‑Dielectric Ceramic Energy Storage — Opportunities
Opportunities · theme 03
High‑Dielectric Ceramic Energy Storage
903 papers · 15.1% of this block
2022: 256 of every 10,000 papers on this subject2023: 256 of every 10,000 papers on this subject2024: 194 of every 10,000 papers on this subject2025: 145 of every 10,000 papers on this subject2022: 256 of every 10,000 papers on this subject2023: 256 of every 10,000 papers on this subject2024: 194 of every 10,000 papers on this subject2025: 145 of every 10,000 papers on this subject▼ -43% share2022→2025 share of research on this subject
Works investigate ceramic and ferroelectric materials for compact, high‑energy density storage devices.
Dielectric · Energy storage · Ceramic · Ferroelectricity
“Development of <scp>PVDF</scp> / <scp>PMMA</scp> ‐Cu nanocomposites with enhanced dielectric properties and energy storage density for capac”
Hybrid Renewable‑Battery System Designs — Opportunities
Opportunities · theme 04
Hybrid Renewable‑Battery System Designs
837 papers · 13.9% of this block
2022: 1,678 of every 10,000 papers on this subject2023: 1,780 of every 10,000 papers on this subject2024: 1,653 of every 10,000 papers on this subject2025: 2,207 of every 10,000 papers on this subject2022: 1,678 of every 10,000 papers on this subject2023: 1,780 of every 10,000 papers on this subject2024: 1,653 of every 10,000 papers on this subject2025: 2,207 of every 10,000 papers on this subject▲ +32% share2022→2025 share of research on this subject
Studies present integrated control strategies for photovoltaic, wind, and storage to boost reliability and emissions reduction.
Renewable energy · Photovoltaic system · Electricity · Battery
“Optimizing Power System Reliability and Carbon Emissions With a Fuzzy Unit Commitment Model Incorporating Renewable Energy, Load Forecast Er”
Graphene‑Based Supercapacitor Innovations — Opportunities
Opportunities · theme 05
Graphene‑Based Supercapacitor Innovations
604 papers · 10.1% of this block
2022: 1,443 of every 10,000 papers on this subject2023: 1,418 of every 10,000 papers on this subject2024: 1,287 of every 10,000 papers on this subject2025: 1,132 of every 10,000 papers on this subject2022: 1,443 of every 10,000 papers on this subject2023: 1,418 of every 10,000 papers on this subject2024: 1,287 of every 10,000 papers on this subject2025: 1,132 of every 10,000 papers on this subject▼ -22% share2022→2025 share of research on this subject
Research highlights graphene electrodes that deliver ultrahigh energy and power densities in hybrid devices.
Supercapacitor · Capacitance · Electrode · Graphene
“A high-performance supercapacitor-battery hybrid energy storage device based on graphene-enhanced electrode materials with ultrahigh energy ”
Microgrid Energy Management Advances — Opportunities
Opportunities · theme 06
Microgrid Energy Management Advances
461 papers · 7.7% of this block
2022: 1,100 of every 10,000 papers on this subject2023: 1,167 of every 10,000 papers on this subject2024: 1,118 of every 10,000 papers on this subject2025: 1,543 of every 10,000 papers on this subject2022: 1,100 of every 10,000 papers on this subject2023: 1,167 of every 10,000 papers on this subject2024: 1,118 of every 10,000 papers on this subject2025: 1,543 of every 10,000 papers on this subject▲ +40% share2022→2025 share of research on this subject
Papers develop optimization and control methods for distributed generation and storage within resilient microgrids.
Microgrid · Energy storage · Renewable energy · Distributed generation
“Power Management of Hybrid Microgrid with Energy Storage System”
Nano‑Enhanced Phase‑Change Thermal Storage — Opportunities
Opportunities · theme 07
Nano‑Enhanced Phase‑Change Thermal Storage
453 papers · 7.5% of this block
2022: 186 of every 10,000 papers on this subject2023: 193 of every 10,000 papers on this subject2024: 185 of every 10,000 papers on this subject2025: 248 of every 10,000 papers on this subject2022: 186 of every 10,000 papers on this subject2023: 193 of every 10,000 papers on this subject2024: 185 of every 10,000 papers on this subject2025: 248 of every 10,000 papers on this subject▲ +33% share2022→2025 share of research on this subject
Works demonstrate improved efficiency and stability of thermal storage using nanomaterial‑augmented phase‑change media.
Thermal energy storage · Thermal · Phase-change material · Latent heat
“Advances in nano-enhanced phase change materials and hybrid thermal energy storage systems: Paving the way for sustainable energy solutions”

Which of these themes are growing fastest

Tracks how the share of research themes has shifted globally between 2022 and 2025.

Problems
how much more (or less) of the world’s research on this subject each theme took up, 2022→2025
gaining sharelosing share
Renewable‑Grid Integration Hurdles▲+36%
Lithium and Flow Battery Limits▲+36%
Energy Storage System Challenges▲+30%
Hydrogen Storage Difficulties▲+13%
Battery Electrode Material Issues▲+4%
Electrolyte Design Obstacles▲+0%
Supercapacitor Material Constraints▼-26%
Cautions
how much more (or less) of the world’s research on this subject each theme took up, 2022→2025
gaining sharelosing share
Grid Stability with Renewables▲+36%
Thermal Storage Material Risks▲+33%
Economic Viability of Storage▲+29%
Vanadium Flow Battery Degradation▲+11%
Alternative Battery Chemistry Concerns▲+4%
Battery Thermal Runaway Risks▲+4%
Nanostructured Supercapacitor Safety▼-9%
Opportunities
how much more (or less) of the world’s research on this subject each theme took up, 2022→2025
gaining sharelosing share
Microgrid Energy Management Advances▲+40%
Optimized Storage for Renewable Grids▲+36%
Nano‑Enhanced Phase‑Change Thermal Storage▲+33%
Hybrid Renewable‑Battery System Designs▲+32%
Advanced Electrolyte‑Electrode Interfaces▲+4%
Graphene‑Based Supercapacitor Innovations▼-22%
High‑Dielectric Ceramic Energy Storage▼-43%
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About this data: built from Fliar's company, founder, funding, hiring, jobs, news and research trackers, covering Spain. Counts are of companies we track, not of every company that exists. Updated August 2026.
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