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Funding and advertised pay are reported in USD; filed accounts retain their stated source currency and basis.

Exchange-rate basis

Indicative conversions use ECB reference rates dated 2026-09-14, applied consistently across all periods. They are not historical exchange rates. Indian rupees may use crore (1 crore = 10 million); other currencies use K, M and B. CSV downloads, source documents and quoted news headlines retain their original currencies.

THE BERLIN EDITION 2026

Berlin’s
energy tech industry,
in focus.

The companies, capital and talent shaping energy tech in Berlin. Find the leaders. Understand the segments. See where the activity is.

Explore in Radar Read the key signals
Snapshot: Funding in USD
Illustrated cover for Energy Tech Industry Landscape of Berlin
DE
COMPANIES · CAPITAL · TALENT

An industry ecosystem,
measured in context.

Energy Tech illustration
Companies tracked 264Energy Tech ecosystem in Berlin Disclosed funding $4.5B73 companies · all recorded rounds Companies hiring 21With open roles at the snapshot Tracked open roles 420 employers posted in the preceding 30 days
MEET THE COMPANIES

Explore Berlin’s energy tech leaders

24 featured companies from the funding, hiring, revenue and team-size leaderboards.

Expand panel +
Explore the full landscape
Energy Tech company highlights in Berlin, snapshot 4 September 2026
Company
Cloover Energycloover.energy$1.34B———
TIERtier.app$642.93M—234—
Skeleton Techskeletontech.com$399.68M—214Financial figure available in RadarView in Radar
zolarzolar.de$306.57M—75—
Lifthiumlifthium.com$210M———
Terra Oneterra.one$184.77M———
Soltecturesoltecture.com$160M———
H2.LIVEh2.live$121M—41—
Thermondothermondo.de—10 roles352—
EMPITempit.com—4 roles——
Lumenazalumenaza.de—3 roles38—
Nex Hydronex.aero—3 roles4—
Amperecloudamperecloud.com—2 roles29—
Elproelpro.de—2 roles——
Hubjecthubject.com—2 roles61Financial figure available in RadarView in Radar
JUNA Technologiesjuna.com—2 roles——
BaxEnergybaxenergy.com——142—
Comgycomgy.io——120—
Ellielli.eco——350—
Enpalenpal.de——672—
Enterenter.de——75—
Home Power Solutionshomepowersolutions.de——111Financial figure available in RadarView in Radar
Live EOlive-eo.com——130Financial figure available in RadarView in Radar
Ostromostrom.de——27—
24 featured companies

Locked revenue figures are available in Radar; the eight company financial previews stay the same throughout this page. A dash means the figure is outside these featured lists. Revenue years vary by company; the figures are not a like-for-like revenue comparison. Compare annual accounts ↗

Company discovery

Recorded evidence only

Explore the live startup set in Radar

No company example met every recorded classification, independence and public-profile gate in this snapshot. The live directory may have newer qualifying companies.

Explore classified startups in Radar ↗
THE KEY SIGNALS

Energy Tech industry KPIs in Berlin

A few useful ratios bring the size of this ecosystem into perspective.

4 September 2026
Hiring participation8.0%

21 of 264 tracked companies have open roles.

Funding participation37.5%

99 of 264 tracked companies have a recorded round.

Top 3 funding share53.0%

Share of disclosed capital received by the three largest recorded recipients.

Median disclosed round$4.34M

Midpoint of 176 rounds with a disclosed amount.

Scale is concentrated. Opportunity is broader. The three largest funding recipients hold 53.0% of disclosed capital, while 62.5% of tracked companies have no recorded funding round.

Explore the segments →
CAPITAL & COMPANY FORMATION

How Berlin energy tech has grown

Recorded company formation and disclosed funding across the complete annual series shown.

Expand panel +
2016 — 2025

Disclosed funding by year

Sum of recorded funding rounds · USD

Berlin energy tech
$0$147.38M$294.76M$442.14M$589.52M2016: $67.88M20162017: $61.05M20172018: $37.01M20182019: $166.48M20192020: $396.24M20202021: $469.57M20212022: $517.12M20222023: $308.66M20232024: $325.66M20242025: $276.85M2025
View the numbers
Annual energy tech funding and company formation in Berlin
YearFunding (USD)FoundedRaising
2016$67.88M176
2017$61.05M249
2018$37.01M2511
2019$166.48M2212
2020$396.24M2412
2021$469.57M1113
2022$517.12M1020
2023$308.66M2121
2024$325.66M315
2025$276.85M111
WHERE CAPITAL SITS

Funding concentration

Share of all disclosed company funding.

  • Cloover Energy29.8%
  • TIER14.3%
  • Skeleton Tech8.9%
  • Other companies47.0%

Funding by stage

254 recorded rounds since 2016

NUMBER OF ROUNDS
Seed & Angel87 34.3%
Series A–B70 27.6%
Series C+ / PE18 7.1%
Grants, debt & other79 31.1%

Recent recorded rounds

Latest recorded rounds · USD
2 rounds

Swipe or scroll horizontally to browse.

Series E05/2026
Skeleton Tech $38.76M

Backed by Axon Partners Group and SmartCap and others.

Series C05/2026
Live EO $32.74M

Backed by HELANTIC and b2venture and others.

Largest and notable recorded rounds

Each card is one recorded round
10 cards

Swipe or scroll horizontally to browse.

Series C11/2020
TIERtier.app$250M

Backed by Mubadala and Northzone and others.

Series C05/2022
zolarzolar.de$105.07M

Backed by Energy Impact Partners and GIC and others.

Series A01/2019
Circcirc.com$62.64M

Backed by Target Global and Idinvest Partners and others.

Series B10/2019
TIERtier.app$60M

Backed by Mubadala and Goodwater Capital and others.

THE BUSINESS BEHIND THE ACTIVITY

Revenue, profitability & financial strength

Expand panel +

Annual accounts availability

The measured Germany identity-to-filing probe did not produce a qualifying designated legal or national-ID join: designated German registry identities do not carry the LEI or ISIN used by bundesanzeiger facts; legal-name matching is prohibited.; The measured Germany identity-to-filing probe did not produce a qualifying designated legal or national-ID join: designated German registry identities do not carry the LEI or ISIN used by bundesanzeiger facts; legal-name matching is prohibited.

DIGITAL FOOTPRINT

Web traffic, app reach and release cadence

How the Berlin companies on this page show up online: the sites people visit, the apps they install, and how often those apps ship.

Most-installed apps

36 of these companies (13.6%) publish at least one Android app — 53 apps in all, carrying 13.9M installs between them.

AppInstallsRatingStore category
TIER - Unlock Your CityTIER12.1M3.3Travel & Local
Plugsurfing — charge anywherePlugSurfing356.3K4.3Maps & Navigation
emmy: electric moped sharingEmmy Sharing320K2.6Maps & Navigation
Ostrom Energy - Smart & GreenOstrom204.3K3.9House & Home
Elli ChargingElli198.1K—Maps & Navigation
Enpal.Enpal147.1K—Lifestyle
Charge myHyundaiDigital Charging Solutions125.9K—Maps & Navigation
AirElectric-EV charging pricesAirElectric80.6K—Maps & Navigation
Polestar ChargePlugSurfing53.9K—Auto & Vehicles
RangerTIER39.8K—Productivity

Installs are lifetime totals to date at the June 2026 store reading — a measure of reach, not of people using an app today.

App reach by segment

The busiest app inside each of this page’s own segments, with the quarterly release trend behind it (2023Q1–2026Q2).

SegmentAppsInstallsLeading appRelease trend
Electric Vehicles2713.4MTIER - Unlock Your City 12.1M
Road Transport Tech812.5Memmy: electric moped sharing 320K
Energy Storage Tech14846.7KPlugsurfing — charge anywhere 356.3K
Smart Grid3228.9KOstrom Energy - Smart & Green 204.3K
Renewable Energy Tech6153.4KEnpal. 147.1K
Energy Efficiency Tech1673.4KZuhause - effizient verwaltet 36.7K
Facility Management Tech1573KSensorberg One Access 18.3K
Property Management Tech1265.4Kfacilioo 5K

A company can carry several segment tags, so these rows overlap and should not be added together. Trend lines are zero-based and share one quarter grid, so a flat line is a quiet segment, not a missing one.

Release cadence by quarter

New apps published, beside apps whose most recent update landed in that quarter — the second bar is how much of the shelf is still being maintained.

2022Q4: 12022Q4: 12022Q42023Q1: 22023Q1: 02023Q12023Q2: 32023Q2: 02023Q22024Q2: 22024Q2: 02024Q22025Q1: 22025Q1: 02025Q12025Q2: 12025Q2: 42025Q22025Q3: 12025Q3: 32025Q32025Q4: 12025Q4: 42025Q4

Darker bars are new releases, lighter bars apps updated. 30 of 53 apps carry a release date. The series ends at 2025Q4, the last quarter that closed before the June 2026 reading.

INSIDE THE INDUSTRY

The Berlin energy tech market map

Explore the segments behind the headline numbers.

Expand panel +

Where companies are building

Rank segments by scale, hiring or disclosed funding.

Enterprise tech162
Consumer digital103
Green transport80
Deep tech64
Enterprise software57
Saas43
Energy saas34
Electric vehicle charging31
Smart buildings27
Solar energy tech25
Online rental13
Building energy management system13

Companies can sit in several segments. Counts and funding overlap.

SEGMENT TO EXPLORE

Enterprise tech

The largest measured segment in this report snapshot.

162companies
11.1%have hiring activity

18 companies hiring · $3.55B disclosed funding

Explore in Radar

How companies make money

Common revenue models; a company can use more than one.

Subscription138
Physical commerce86
E-commerce - product69
Commission on transaction62
Fee-for-service35
E-commerce - service16
Advertising10
Renting / leasing5
THE COMPANIES IN MOTION

Who is listing, hiring leaders, launching and winning work

Recorded corporate activity linked to companies in this landscape.

Expand panel +
Recent corporate headlines 10 dated reports
Funding roundsmetiundo.io ↗

Among the largest financings were Kiavi ($350 million, debt), Dwelly ($50 million, debt), Metiundo ($47.6 million, Series A), OneDome ($34.2 million, Series C), Stake ($31 million, Series B), Ownwell ($30 million, Series B), and Orchard ($30 million, venture).

Funding roundsgraforce.com ↗

The investor consortium comprising the Paris-based Next Generation Fuels Industrial & Technological fund Calderion (Audacia), alongside infrastructure developer Terravent and WenCo Family Office, announces the closing of a strategic double-digit million-euro financing round for Berlin-based Graforce GmbH.

Funding roundsostrom.de ↗

In Germany, Berlin-based Ostrom raised €20 million to accelerate smart meter adoption and expand its virtual power plant capabilities, making it a directly comparable domestic example.

Funding roundsterra.one ↗

Terra One raised up to €150 million in mezzanine financing for its large-scale battery storage portfolio.

Funding roundsenpal.de ↗

Enpal secures €700M ABS facility with M&G for residential solar and heating loans

Funding roundsenter.de ↗

São Paulo-based legaltech company Enter has successfully raised $37.5 million in a Series A funding round led by Founders Fund and Sequoia Capital, valuing the company at $375 million post-money.

Mergers & acquisitionscycle.eco ↗

Atlassian has acquired the technology and team of French startup Cycle

Funding roundsthermondo.de ↗

Germany’s top heat pump installer, thermondo, has raised €50 million through special vehicle financing to support its Flex program—making climate-friendly heating more affordable.

Funding roundscariqa.com ↗

Cariqa, a Berlin-based platform for electric vehicle (EV) charging payments and pricing, has raised €4m in seed funding.

Funding roundsscale-energy.eco ↗

Scale Energy, a top developer of industrial battery storage systems in Germany, has raised €2M in Seed funding. The round was led by Climentum Capital, with support from Vireo Ventures and existing investors Antler and P3A.

Full recorded event mix

Top 8 categories among 40 recorded events in the 24-month window.

Funding rounds
25
Leadership moves
5
Capital infusions
4
Mergers & acquisitions
2
Layoffs
1
Company announcements
1
Earnings
1
Contracts
1

Workforce actions

1 companies with reported reductions

zolar ↗

Scale not stated rolesbusiness restructuring

Mergers and acquisitions

Company-linked deal reports; status is preserved as recorded.

Acquirer → targetStatusDateValue / context
tcpl→ME Energy ↗Announced2025-12-12Not stated in snapshot
atlassian→CYCLE ↗Completed2025-10-31Not stated in snapshot
TIER→nextbikeAnnounced2024-11-15Not stated in snapshot
TIER→dottCompleted2024-10-02Not stated in snapshot
ancala→Solandeo ↗Announced2024-06-27Not stated in snapshot
yokogawa electric→BaxEnergy ↗Announced2024-06-06Not stated in snapshot

A discussion or rumour is not a completed transaction. An unstated value is not zero.

PEOPLE & OPPORTUNITY

The talent market

212 postings in the preceding 12 months. The full 840-posting snapshot covers 21 employers.

Expand panel +

Most advertised job titles

Elektroniker / Elektriker110
Anlagenmechaniker Shk96
Außendienstmitarbeiter74
Quereinsteiger Installationsbereich38
Servicetechniker21
Servicetechniker Shk20
0 internship postings

0 tracked postings mention remote work.

The seniority mix

50 postings specify a level.

unspecified
790
manager
25
senior
11
lead
10
intern
3
entry
1

Skills employers mention

Top skills across 840 tracked postings in the available jobs snapshot.

Ci/Cd
2
Github Actions
2
Aws
2
Docker
2
Systems Engineering
1
Ai Tools
1
Claude Code
1
Data Engineering
1
Ai
1
Cloud
1
ADVERTISED PAY$45.4K/ year

Median across 33 postings with pay data, expressed in USD.

THE PEOPLE BUILDING THE FIELD

Founders and leaders

246 founders and chief executives across 152 companies.

Expand panel +
12 profiles

Swipe or scroll horizontally to browse.

Education networks

33 profiles with education records.

Technische Universität Berlin
7
Humboldt-Universität zu Berlin
3
Imperial College London
3
Bocconi University
2
INSEAD
2
Frankfurt School of Finance & Management
2
RWTH Aachen University
2
HEC Paris
2

Prior employers

7 profiles with prior-work records.

McKinsey
3
Apple
1
Uber
1
Microsoft
1
Bain
1

Profiles cover recorded founders and leaders; contact details remain in Radar.

NEWS INTELLIGENCE

How this industry appears in the news

24,110 articles in the measured 12-month window.

Expand panel +
24,110articles in the measured year
5,473articles in 2026Q1
52.2%positive tone in the latest complete year

News volume trends

Energy Tech coverage tagged Berlin · articles per complete quarter

02,9205,8398,75911,6782021Q2: 5,2402021Q22021Q3: 5,7102021Q4: 4,9392022Q1: 8,0562022Q2: 6,9082022Q22022Q3: 6,0422022Q4: 6,5622023Q1: 8,0372023Q2: 6,0942023Q22023Q3: 5,2742023Q4: 5,6212024Q1: 9,8982024Q2: 8,8402024Q22024Q3: 8,4542024Q4: 7,7152025Q1: 10,1552025Q2: 6,3632025Q22025Q3: 6,3422025Q4: 6,0182026Q1: 5,4732026Q1
View quarterly article counts
QuarterArticles
2021Q25,240
2021Q35,710
2021Q44,939
2022Q18,056
2022Q26,908
2022Q36,042
2022Q46,562
2023Q18,037
2023Q26,094
2023Q35,274
2023Q45,621
2024Q19,898
2024Q28,840
2024Q38,454
2024Q47,715
2025Q110,155
2025Q26,363
2025Q36,342
2025Q46,018
2026Q15,473

Article volume measures coverage, not market sales.

Tone of coverage over time

2021
7,946 positive · 312 neutral · 8,734 negative
2022
11,128 positive · 458 neutral · 15,959 negative
2023
11,638 positive · 408 neutral · 12,949 negative
2024
15,874 positive · 651 neutral · 18,338 negative
2025
15,059 positive · 409 neutral · 13,387 negative

Leading coverage topics

Energy Tech coverage tagged Berlin · ranked by full-period article count.

Geopolitical Disputes And Contested Areas300,925 articles in the full recorded period
108,094 recent · 81,371 prior
International And Transnational Geographic Entities300,921 articles in the full recorded period
108,092 recent · 81,371 prior
Administrative And Political Subdivisions300,873 articles in the full recorded period
108,067 recent · 81,361 prior
International Political Relations61,544 articles in the full recorded period
14,454 recent · 13,428 prior
Security And Defense Policies42,284 articles in the full recorded period
10,451 recent · 8,574 prior
International Sports Competitions34,791 articles in the full recorded period
5,623 recent · 9,787 prior
International Relations And Diplomacy25,907 articles in the full recorded period
6,781 recent · 5,761 prior
Olympic Games Coverage18,442 articles in the full recorded period
3,008 recent · 5,896 prior
Professional League Updates16,274 articles in the full recorded period
3,722 recent · 3,575 prior
Trade Policies And Agreements14,443 articles in the full recorded period
3,921 recent · 4,523 prior

Recent and prior counts use the source comparison windows.

Topics gaining and losing attention

Germany comparison coverage

KeywordRecentPriorChange
countries4,1931,858126%
multilateral diplomacy1,5911,05950%
national security strategy95961656%
study overseas64836976%
overseas study58834272%
oil price volatility557182206%
semester abroad52830673%
aerial bombardments522182187%
quarterly financials48333146%
commodity futures44922798%
europa league4292,206-81%
olympic team selections7701,896-59%
nationalist composers21,889-100%
aleatoric music81,468-99%
quarterfinals3771,327-72%

Event and signal lenses

Germany comparison coverage

All complete annual cohorts shown
Rising

Regulatory Risk

755,487 classified articles

territories, disputed islands, countries

24.0% critical · 14.8% positive
Rising

Funding Momentum

77,913 classified articles

inflation reports fx, currency intervention policies, eur/usd

41.1% critical · 43.7% positive
Rising

Growth

195,366 classified articles

gdp growth rate, gdp acceleration, economic output growth

29.6% critical · 46.3% positive

Energy Tech coverage tagged Berlin. Topic labels describe recorded classifications and can include broad context.

RESEARCH SIGNALS

What Energy Tech research is working on

53,205 papers in the recorded worldwide scope.

Expand panel +
53,205papers
53,205worldwide comparison pool
—India-affiliated papers

Research orientation

Promising
25,316
Breakthrough
16,441
Descriptive
4,336
Problem-identifying
3,698
Comparative
2,002
Cautionary
1,267
Critical
145

Contribution mix

Methods-led
32,549
Empirical
11,856
Reviews
7,722
Position pieces
850
Theoretical
228

Tone counts: 50,914 positive · 1,755 neutral · 536 negative.

Common problems researchers identify
3,843 papers · 7.2% of this field
  • Energy storage2,027 papers
  • Battery952 papers
  • Renewable energy900 papers
  • Electrolyte537 papers
  • Anode488 papers
  • Nanotechnology382 papers
  • Cathode363 papers
  • Lithium329 papers

Landmark: Pseudocapacitive oxide materials for high-rate electrochemical energy storage

Cautions
1,267 papers · 2.4% of this field
  • Energy storage453 papers
  • Renewable energy306 papers
  • Battery276 papers
  • Electrolyte155 papers
  • Electricity127 papers
  • Photovoltaic system112 papers
  • Grid103 papers
  • Anode99 papers

Landmark: Electrode Materials for Rechargeable Sodium‐Ion Batteries: Potential Alternatives to Current Lithium‐Ion Batteries

Opportunities
41,757 papers · 78.5% of this field
  • Energy storage17,247 papers
  • Renewable energy7,206 papers
  • Battery6,869 papers
  • Supercapacitor4,411 papers
  • Electrolyte4,207 papers
  • Electrochemistry3,929 papers
  • Photovoltaic system3,721 papers
  • Anode3,695 papers

Landmark: Hierarchical Control of Droop-Controlled AC and DC Microgrids—A General Approach Toward Standardization

Leading institutions

Chinese Academy of Sciences
132,184
Tsinghua University
73,943
Nanyang Technological University
61,056
University of California, Los Angeles
45,015
The University of Texas at Austin
43,827
Nankai University
35,758

Leading researchers

Bruce Dunn
29,397
Patrice Simon
22,591
Jean‐Marie Tarascon
20,526
Yury Gogotsi
19,210
Yang‐Kook Sun
15,104
Haresh Kamath
14,705
Arumugam Manthiram
14,093
Yi Cui
12,327

Highly cited breakthrough-labelled papers

  • Supercapacitor Devices Based on Graphene Materials2,527 citations
  • Graphene Anchored with Co<sub>3</sub>O<sub>4</sub> Nanoparticles as Anode of Lithium Ion Batteries with Enhanced Reversible Capacity and Cyclic Perfor2,431 citations
  • Challenges and Prospects of Lithium–Sulfur Batteries2,319 citations
  • Nitrogen-doped mesoporous carbon of extraordinary capacitance for electrochemical energy storage2,047 citations
  • Electrochemical Na Insertion and Solid Electrolyte Interphase for Hard‐Carbon Electrodes and Application to Na‐Ion Batteries2,043 citations

Common problems researchers identify

3,636 papers · 7 recurring themes
7 cards

Swipe or scroll horizontally to browse.

Energy Storage System ChallengesCommon problems researchers identify · 01

Energy Storage System Challenges

738 papers

20.3% of this theme group

Researchers outline barriers and trade‑offs in current storage technologies for power grids.

Energy storage (628) · Renewable energy (327) · Environmental economics (102) · Energy (111)

Comparative Review of Energy Storage Systems, Their Roles, and Impacts on Future Power Systems

A Comprehensive Review on Energy Storage Systems: Types, Comparison, Current Scenario, Applications, Barriers, and Potential Solutions, Poli

View research history
YearShare index
20221155.8
20231242.8
20241162.8
20251529.9
Battery Electrode Material LimitsCommon problems researchers identify · 02

Battery Electrode Material Limits

617 papers

17.0% of this theme group

Studies highlight difficulties in developing durable anodes and cathodes for next‑generation batteries.

Anode (362) · Cathode (269) · Energy storage (330) · Battery (225)

Developing Cathode Materials for Aqueous Zinc Ion Batteries: Challenges and Practical Prospects

Advances of lithium-ion batteries anode materials—A review

View research history
YearShare index
2022478.0
2023477.3
2024418.7
2025508.1
Lithium and Flow Battery ConstraintsCommon problems researchers identify · 03

Lithium and Flow Battery Constraints

557 papers

15.3% of this theme group

Papers discuss performance ceilings and material issues restricting lithium‑ion and flow batteries.

Battery (397) · Energy storage (351) · Lithium (99) · Flow battery (40)

Electrical energy storage for transportation—approaching the limits of, and going beyond, lithium-ion batteries

<scp>High‐Energy</scp> Lithium‐Ion Batteries: Recent Progress and a Promising Future in Applications

View research history
YearShare index
202265.6
202365.6
202468.2
202581.4
Electrolyte and Interface IssuesCommon problems researchers identify · 04

Electrolyte and Interface Issues

442 papers

12.2% of this theme group

Research points to electrolyte stability and interfacial engineering as critical hurdles for high‑energy cells.

Electrolyte (356) · Fast ion conductor (49) · Lithium (115) · Electrochemistry (107)

Electrolyte-Additive-Driven Interfacial Engineering for High-Capacity Electrodes in Lithium-Ion Batteries: Promise and Challenges

Advanced Electrolyte Design for High‐Energy‐Density Li‐Metal Batteries under Practical Conditions

View research history
YearShare index
2022522.0
2023537.9
2024465.8
2025536.6
Renewable Grid Integration ObstaclesCommon problems researchers identify · 05

Renewable Grid Integration Obstacles

436 papers

12.0% of this theme group

Analyses examine technical and operational problems when coupling solar, wind, and storage to the grid.

Renewable energy (264) · Photovoltaic system (94) · Grid (74) · Electricity (73)

A Review of Hybrid Renewable/Alternative Energy Systems for Electric Power Generation: Configurations, Control, and Applications

Electric vehicles with renewables integration in electrical power systems: A review of technologies, uncertainties and optimization allocati

View research history
YearShare index
20221720.1
20231836.7
20241693.3
20252352.7
Supercapacitor Material BottlenecksCommon problems researchers identify · 06

Supercapacitor Material Bottlenecks

431 papers

11.9% of this theme group

Works identify nanostructure and conductivity limits that impede supercapacitor performance.

Supercapacitor (235) · Nanotechnology (196) · Energy storage (329) · Electrochemical energy storage (78)

Flexible and Stretchable Energy Storage: Recent Advances and Future Perspectives

Review on Carbon Nanostructures for Supercapacitors: Cutting-Edge Energy Storage Applications and Perspectives

View research history
YearShare index
20224845.5
20234681.9
20244784.4
20253630.0
Hydrogen Storage DifficultiesCommon problems researchers identify · 07

Hydrogen Storage Difficulties

415 papers

11.4% of this theme group

Literature reviews the safety, efficiency, and material challenges of storing hydrogen for energy use.

Hydrogen storage (134) · Hydrogen (80) · Thermal energy storage (83) · Energy storage (226)

Hydrogen Storage Technologies for Future Energy Systems

Chemical‐based Hydrogen Storage Systems: Recent Developments, Challenges, and Prospectives

View research history
YearShare index
2022306.6
2023332.4
2024334.3
2025353.7

Cautions

1,184 papers · 7 recurring themes
7 cards

Swipe or scroll horizontally to browse.

Economic Viability of StorageCautions · 01

Economic Viability of Storage

261 papers

22.0% of this theme group

Authors caution that cost‑benefit analyses often reveal limited financial returns for storage projects.

Energy storage (178) · Renewable energy (112) · Environmental economics (32) · Electricity (51)

Development of Energy Storage Systems for Power Network Reliability: A Review

A Quantitative Assessment of the Economic Viability of Photovoltaic Battery Energy Storage Systems

View research history
YearShare index
20221408.3
20231483.7
20241358.3
20251830.3
Grid Stability with RenewablesCautions · 02

Grid Stability with Renewables

216 papers

18.2% of this theme group

Studies warn of stability and reliability risks when integrating high shares of variable renewables.

Renewable energy (125) · Photovoltaic system (63) · Grid (52) · Electricity (48)

Impacts of Renewable Energy Integration on Power System Stability

Integrating Variable Renewable Energy Into the Grid: Key Issues

View research history
YearShare index
20221720.1
20231836.7
20241693.3
20252352.7
Thermal Storage Material RisksCautions · 03

Thermal Storage Material Risks

201 papers

17.0% of this theme group

Research highlights durability and scaling concerns for sorption and latent‑heat storage materials.

Thermal energy storage (79) · Energy storage (111) · Thermal (23) · Latent heat (12)

Sorption heat storage for long-term low-temperature applications: A review on the advancements at material and prototype scale

Review of Thermal Energy Storage Materials for Application in Large-Scale Integrated Energy Systems—Methodology for Matching Heat Storage So

View research history
YearShare index
2022180.5
2023189.0
2024192.5
2025241.3
Alternative Battery Chemistry ConcernsCautions · 04

Alternative Battery Chemistry Concerns

182 papers

15.4% of this theme group

Papers raise safety and lifecycle questions for sodium‑ion, lithium‑metal, and solid‑state batteries.

Anode (82) · Cathode (72) · Electrolyte (84) · Lithium (40)

Electrode Materials for Rechargeable Sodium‐Ion Batteries: Potential Alternatives to Current Lithium‐Ion Batteries

From Lithium‐Metal toward Anode‐Free Solid‐State Batteries: Current Developments, Issues, and Challenges

View research history
YearShare index
2022804.6
2023822.9
2024728.0
2025861.7
Nanostructured Supercapacitor HazardsCautions · 05

Nanostructured Supercapacitor Hazards

142 papers

12.0% of this theme group

Analyses point to fabrication complexity and long‑term reliability issues in advanced supercapacitor designs.

Supercapacitor (38) · Capacitance (13) · Electrochemistry (30) · Nanotechnology (17)

Progress and Perspectives on Promising Covalent‐Organic Frameworks (COFs) Materials for Energy Storage Capacity

Conductive Gels for Energy Storage, Conversion, and Generation: Materials Design Strategies, Properties, and Applications

View research history
YearShare index
20221021.4
20231003.7
2024867.5
2025948.9
Battery Thermal Runaway RisksCautions · 06

Battery Thermal Runaway Risks

117 papers

9.9% of this theme group

Works emphasize overheating and state‑of‑charge management as critical safety challenges.

Battery (91) · Thermal runaway (12) · Energy storage (49) · State of charge (10)

Studying Abuse Testing on Lithium-Ion Battery Packaging for Energy Storage Systems

Recent Advances in the Development of Li‐Air Batteries, Experimental and Predictive Approaches – Prospective, Challenges, and Opportunities

View research history
YearShare index
202268.0
202372.5
202450.3
202572.1
Flow Battery Efficiency LimitsCautions · 07

Flow Battery Efficiency Limits

65 papers

5.5% of this theme group

Studies note electrolyte imbalance and degradation as key factors reducing flow battery performance.

Flow battery (46) · Redox (33) · Vanadium (24) · Electrolyte (22)

Vanadium redox flow battery capacity loss mitigation strategy based on a comprehensive analysis of electrolyte imbalance effects

Experimental Study on the Effect of Operating Conditions on the Efficiency of Vanadium Redox Flow Battery

View research history
YearShare index
2022229.6
2023224.8
2024201.8
2025257.5

Opportunities

39,303 papers · 7 recurring themes
7 cards

Swipe or scroll horizontally to browse.

Hybrid Renewable‑Storage OptimizationOpportunities · 01

Hybrid Renewable‑Storage Optimization

1,378 papers

23.0% of this theme group

Research explores coordinated control of storage and wind/solar to improve system efficiency.

Energy storage (1,114) · Renewable energy (356) · Energy (198) · Wind power (169)

Battery Energy Storage Optimization in Distribution Power Systems with Distributed Renewable Energy Resources

Design and Control of an Energy Storage System for Hybrid Renewable Energy Systems

View research history
YearShare index
20221241.7
20231328.6
20241279.1
20251709.0
Advanced Electrolyte‑Electrode DesignsOpportunities · 02

Advanced Electrolyte‑Electrode Designs

1,364 papers

22.7% of this theme group

Papers propose novel electrolyte formulations that enable robust, high‑performance battery electrodes.

Cathode (418) · Electrolyte (470) · Anode (402) · Electrochemistry (347)

Phosphated Electrolyte Enabling Dual Robust Electrode–Electrolyte Interfacial Reconstruction Toward Capable Zn Metal Batteries

Sustainable High‐Performance Aqueous Batteries Enabled by Optimizing Electrolyte Composition

View research history
YearShare index
2022804.6
2023822.9
2024728.0
2025861.7
High‑Dielectric Ceramic Energy StorageOpportunities · 03

High‑Dielectric Ceramic Energy Storage

903 papers

15.1% of this theme group

Works investigate ceramic and ferroelectric materials for compact, high‑density capacitive storage.

Dielectric (122) · Energy storage (502) · Ceramic (64) · Ferroelectricity (43)

Development of <scp>PVDF</scp> / <scp>PMMA</scp> ‐Cu nanocomposites with enhanced dielectric properties and energy storage density for capac

Advanced carbon nanomaterials for high-performance energy storage technologies

View research history
YearShare index
2022256.3
2023249.6
2024190.2
2025138.3
Renewable‑Driven Power System PlanningOpportunities · 04

Renewable‑Driven Power System Planning

837 papers

13.9% of this theme group

Studies develop models to balance reliability, emissions, and cost in renewable‑heavy grids.

Renewable energy (356) · Photovoltaic system (242) · Electricity (116) · Battery (193)

Optimizing Power System Reliability and Carbon Emissions With a Fuzzy Unit Commitment Model Incorporating Renewable Energy, Load Forecast Er

Distributed scheduling for multi-energy synergy system considering renewable energy generations and plug-in electric vehicles: A level-based

View research history
YearShare index
20221685.9
20231766.8
20241632.8
20252211.5
Graphene‑Based Supercapacitor HybridsOpportunities · 05

Graphene‑Based Supercapacitor Hybrids

604 papers

10.1% of this theme group

Research showcases graphene electrodes that merge supercapacitor speed with battery energy density.

Supercapacitor (526) · Capacitance (273) · Electrode (176) · Graphene (76)

A high-performance supercapacitor-battery hybrid energy storage device based on graphene-enhanced electrode materials with ultrahigh energy

A review of supercapacitors: Materials, technology, challenges, and renewable energy applications

View research history
YearShare index
20221430.1
20231435.3
20241280.5
20251148.6
Microgrid Energy ManagementOpportunities · 06

Microgrid Energy Management

461 papers

7.7% of this theme group

Papers present strategies for coordinating storage and distributed generation within localized grids.

Microgrid (331) · Energy storage (270) · Renewable energy (179) · Distributed generation (56)

Power Management of Hybrid Microgrid with Energy Storage System

Capacity Optimization of Battery Energy Storage Systems in a Microgrid

View research history
YearShare index
20221086.5
20231156.0
20241104.3
20251546.0
Nano‑Enhanced Phase‑Change StorageOpportunities · 07

Nano‑Enhanced Phase‑Change Storage

453 papers

7.5% of this theme group

Investigations focus on nanomaterials that boost thermal storage capacity and charging rates.

Thermal energy storage (267) · Thermal (84) · Phase-change material (65) · Latent heat (39)

Advances in nano-enhanced phase change materials and hybrid thermal energy storage systems: Paving the way for sustainable energy solutions

Improving the efficiency of thermal energy storage through the development and evaluation of hybrid nano-enhanced phase change materials

View research history
YearShare index
2022182.1
2023190.9
2024194.8
2025243.8

How this field compares with the research baseline

Orientation shares compared with 25,000 papers in the reference sample.

Research orientationThis fieldReference sample
Promising47.6%37.1%
Breakthrough30.9%26.5%
Descriptive8.1%17.7%
Problem-identifying7.0%9.5%
Comparative3.8%4.0%
Cautionary2.4%4.3%
Critical0.3%0.9%

Concerns receiving less research attention

Counts and shares refer to the stated research pool. A low count describes how much of that research is recorded here, not the absence of a real-world concern.

Concern / example paperPapersShareRaised as a problemWorldwide share
Energy & datacenter footprintEnergy storage in datacenters430.09%4 (9.3%)0.09%
Hardware, e-waste & supply chainLife Cycle Assessment and Sustainability of Energy Storage Options for Solar PV Technologies300.06%3 (10.0%)0.06%
Privacy & surveillanceA Resilient and Privacy-Preserving Energy Management Strategy for Networked Microgrids230.05%0 (0.0%)0.05%
Water useExperimental and Theoretical Analysis of Immersion Cooling of a Li-Ion Battery Module160.03%0 (0.0%)0.03%
Concentration of compute powerEnergy Storage Market Power Withholding Bounds in Real-time Markets150.03%2 (13.3%)0.03%
Bias & fairnessFlexibility at a cost: Industrial battery storage and the breakdown of grid fee fairness in Germany80.02%1 (12.5%)0.02%
Safety & misuseCyber Resilience of Battery Energy Storage System Scheduling under Adversarial Attack on Load Forecasting50.01%1 (20.0%)0.01%
Carbon & emissions of computeA multi strategy optimization framework using AI digital twins for smart grid carbon emission reduction20.0%0 (0.0%)0.0%
Labour & data work00.0%0 (%)0.0%

Institution and researcher rankings use citations to their covered work. Research scope: worldwide. This may be broader than the company geography.

UNDERSTAND THE LANDSCAPE

Energy Tech in Berlin: key questions

Clear definitions for making better comparisons.

What does this landscape measure?

It measures the tracked company ecosystem, recorded funding, hiring and other available evidence. It is not a market-size estimate.

Can segment counts be added together?

No. A company can belong to several segments, so segment counts and funding can overlap.

What does a missing figure mean?

A dash or unavailable panel means the current reviewed source snapshot does not support that figure.

KEEP EXPLORING

Put Berlin in context

All landscapes ↗

Company ecosystem snapshot: 4 September 2026. Funding is recorded in USD; filed accounts retain their stated currency and reporting basis. Each section identifies its own coverage. The news and research behind these sections is explorable in Prism.

Canonical landscape ↗
Coming soon