Best Solar Energy Companies in London, United Kingdom
The 122 best Solar Energy companies in London, United Kingdom in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Hero Future Energies.
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 London
| # | Company | Disclosed funding | Last round | Employees | Founded | Founder | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Hero Future Energies 🦄 Company focused on solar, wind, energy storage, and green hydrogen solutions 67Moat top 18%Innovation top 20%Product top 21%Funding top 22% All 11 signals ▾Moattop 18% Innovationtop 20% Producttop 21% Fundingtop 22% Talenttop 28% Fin. healthtop 44% Markettop 45% Growthbottom 47% Techbottom 42% Globalbottom 39% Newsbottom 30% Moat: Top 3% by revenue among 253 tracked Wind Energy companies · Editorial + unicorn rating 8/10 Innovation: 12 product lines rank vs industry peers · Fliar Intelligence Index 67/100 | $725M | 8 mo ago | 20 | 2012 | Geetika Agarwal CEO | PHPSalesforceLaravel+14 | — | 2 expansions |
| 2 | Ferroglobe Producer of silicon metal and alloys 64Funding top 22%Product top 28%Market top 33%News top 33% All 8 signals ▾Fundingtop 22% Producttop 28% Markettop 33% Newstop 33% Fin. healthtop 43% Techbottom 49% Growthbottom 40% Globalbottom 37% Funding: Raised $484M across 8 rounds · 8 rounds over 11 yrs (0.7/yr) Product: 1 published app (48 installs) · Company stage: Public rank vs industry peers · Fliar Intelligence Index 64/100 | $484M | 26 mo ago | 3,173 | 2015 | — | DrupalPHPTradingView+22 | — | — |
| 3 | Bboxx Provider of pay-as-you-go power and technology to homes and businesses 57Tech top 23%Funding top 32%Product top 36%Moat top 39% All 11 signals ▾Techtop 23% Fundingtop 32% Producttop 36% Moattop 39% Growthtop 44% Markettop 46% Innovationtop 47% Patentstop 47% Globalbottom 49% Fin. healthbottom 36% Newsbottom 28% Tech: 50 technologies across 6/8 capability areas · Cloud: Amazon Cloudfront, Amazon S3 Funding: Raised $131M across 17 rounds · 17 rounds over 13 yrs (1.3/yr) rank vs industry peers · Fliar Intelligence Index 57/100 | $131M | 42 mo ago | 793 793 → 1,090 (+37%) | 2010 | — | WordPressMySQLPHP+24 | 12 patents Battery health monitoring and smart utility metering for off‑grid energy systems | — |
| 4 | Lekela Power Independent power producer in solar and wind 24Funding top 39%Talent bottom 49%Market bottom 40%Global bottom 37% All 6 signals ▾Fundingtop 39% Talentbottom 49% Marketbottom 40% Globalbottom 37% Newsbottom 32% Techbottom 29% Funding: Raised $118M across 2 rounds · 2 rounds over 11 yrs (0.2/yr) Talent: 1 named leader on record · 1 C-suite/founder profile curated rank vs industry peers · Fliar Intelligence Index 24/100 | $118M | 116 mo ago | 22 | 2015 | Chris Antonopoulos Chief Executive Officer | — | — | — |
| 5 | Elgin Developer of solar renewable energy power projects 32Talent top 28%Growth top 37%News top 40%Funding top 47% All 9 signals ▾Talenttop 28% Growthtop 37% Newstop 40% Fundingtop 47% Techbottom 42% Globalbottom 37% Partnersbottom 32% Marketbottom 26% Fin. healthbottom 18% Talent: 3 named leaders on record · 3 C-suite/founder profiles curated Growth: 1 acquisition/expansion move in 24 mo · Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 32/100 | $78M | 23 mo ago | — | 2009 | Carlos Javier Co-Founder | Webflow EcommerceWebflowApple iCloud Mail+10 | — | — |
| 6 | Solarcentury EPC player in the domain of solar energy 24Innovation top 20%Product top 26%Funding top 43%Market bottom 49% All 9 signals ▾Innovationtop 20% Producttop 26% Fundingtop 43% Marketbottom 49% Globalbottom 39% Techbottom 32% Newsbottom 32% Fin. healthbottom 24% Growthbottom 9% Innovation: 5 product lines Product: 5 distinct product lines · Company stage: Acquired rank vs industry peers · Fliar Intelligence Index 24/100 | $38M | 69 mo ago | 121 | 1998 | — | — | — | — |
| 7 | Azura Power Developer, owner and operator of solar and open-cycle power plants | $30M | 139 mo ago | — | 2008 | David Ladipo Co-Founder | WordPressMySQLPHP+16 | — | — |
| 8 | Chariot Developer of solar and wind energy projects 60Growth top 35%Funding top 41%Market top 42%Tech bottom 42% All 6 signals ▾Growthtop 35% Fundingtop 41% Markettop 42% Techbottom 42% Newsbottom 36% Globalbottom 25% Growth: Fresh capital in last 24 mo Funding: Raised $14.5M across 2 rounds · 2 rounds over 2 yrs (1.0/yr) rank vs industry peers · Fliar Intelligence Index 60/100 | $14M | 12 mo ago | 4,228 | 2021 | — | WordPressMySQLPHP+14 | — | — |
| 9 | P3P Partners Combined heat and power project developers | $14M | 88 mo ago | 15 15 → 23 (+53%) | 2011 | — | WordPressMySQLPHP+16 | — | — |
| 10 | Absolute Energy Capital Provider of advisory, legal and financial services | $11M | 155 mo ago | 1 | 2009 | — | — | — | — |
| 11 | Innova Developer of renewable energy solutions, assisting businesses with sustainable power | $6M | 38 mo ago | — | 2015 | Robin Dummett Co-Founder & Director | WordPressApple iCloud MailMicrosoft 365+17 | — | 1 award |
| 12 | Buffalo Grid Mobile charging infrastructure for rural areas | $6M | 67 mo ago | 8 | 2011 | — | — | — | — |
| 13 | Steelmin Manufacturer of silicon metal and ferrosilicon | $4M | 105 mo ago | — | 2011 | Chris Mcnamee Co-Founder | — | — | — |
| 14 | Energy Saving Trust Provider of energy-saving advice and data. It offers guidance on reducing energy consumption and carbon… | $4M | 69 mo ago | 337 | 2000 | — | WordPressBugHerdMySQL+22 | — | — |
| 15 | Sunstone Systems Off-grid surveillance & communication technology solutions, provider | $4M | 34 mo ago | 12 12 → 15 (+25%) | 2011 | Simon Legrand Co-Founder | — | — | 1 launch · 1 partnership |
| 16 | Lumicity Provider of end to end solutions for solar PV systems | $3M | 177 mo ago | 10 | 2010 | Tristan Fischer Founder | — | — | — |
| 17 | Engensa Limited information available | $3M | 186 mo ago | 51 | 2009 | — | — | — | — |
| 18 | Glowb Company dedicated to simplifying the adoption of residential solar energy | $2M | 35 mo ago | 2 | 2022 | — | — | — | — |
| 19 | Electron Green Provider of solar energy services for residential & commercial | $1M | 28 mo ago | 36 | 2010 | — | WordPressMySQLPHP+27 | — | — |
| 20 | Furlong Energy Developer of solar and wind energy projects | $890K | 34 mo ago | — | 2022 | Ramin Dilmaghanian Founder | — | — | — |
| 21 | Ion Ventures Solar installation company | $650K | 67 mo ago | 16 | 2018 | Dan Taylor Co-Founder | WordPressPleskMySQL+32 | — | — |
| 22 | Rotaheat Provider of clean heat technology that converts motive power direct to clean thermal energy with zero carbon… | $565K | 80 mo ago | 4 | 2012 | — | — | 21 patents Electric heating elements and resistive heat generators for industrial applications | — |
| 23 | ARC Power Developer of solar energy projects 13Talent top 38%Funding top 49%Global bottom 37%Tech bottom 31% All 5 signals ▾Talenttop 38% Fundingtop 49% Globalbottom 37% Techbottom 31% Marketbottom 16% Talent: 2 named leaders on record · 2 C-suite/founder profiles curated Funding: Raised $369k across 5 rounds · 5 rounds over 6 yrs (0.8/yr) rank vs industry peers · Fliar Intelligence Index 13/100 | $369K | 15 mo ago | 5 | 2016 | Oliver Blakeman Co-Founder & CTO | PythonFedoraYouTube+11 | — | 1 partnership |
| 24 | Nur Energie An independent solar power developer | $296K | 46 mo ago | 16 | 2011 | Kevin Sara CEO | — | — | — |
Top 12 Solar Energy companies in London
#1
Series D · London, England · founded 2012 · 20 employees$725Mraised▾
Company focused on solar, wind, energy storage, and green hydrogen solutions. The company develops and implements utility-scale and commercial & industrial renewable energy projects. Its include wind and solar power generation, energy storage solutions, and green hydrogen production. The company also focuses on corporate social responsibility initiatives in communities surrounding its projects. Its aim to create a positive environmental and social impact while providing clean energy.
- Oct 2025Conventional Debt$215M
- Sep 2022Series D$450M
- Oct 2019Series D$150M
- Jan 2017Series D$125M
#2
Public · London, England · founded 2021 · 4228 employees$14.5Mraised▾
Developer of solar and wind energy projects
- May 2025Post IPO$5.5M
- 2024Post IPO$9M
#3
Public · London, England · founded 2015 · 3173 employees$484.2Mraised▾
Producer of silicon metal and alloys
- Apr 2024Grant (prize money)$7.6M
- Apr 2024Grant (prize money)$64.5M
- May 2023Grant (prize money)$7.8M
- Apr 2023Grant (prize money)$3.5M
#4
Acquired · London, England · founded 2009$77.9Mraised▾
Developer of solar renewable energy power projects
- Jul 2024Conventional Debt$77.9M
#5
Series D · London, England · founded 2010 · 793 employees$130.7Mraised▾
Provider of pay-as-you-go power and technology to homes and businesses. They offer clean energy, clean cooking solutions, smartphones, and e-mobility products. The company utilizes a fully integrated operating system to deploy products. It connects individuals and businesses with affordable access to transformative services.
- Dec 2022Conventional Debt$11.5M
- May 2022Series D$15M
- May 2022Conventional Debt$8M
- Nov 2020Conventional Debt$4M
#6
Seed · London, England · founded 2016 · 5 employees$368.8Kraised▾
Developer of solar energy projects
- Mar 2025Seed$2.8M
- Sep 2023Seed$2.7M
- May 2020Seed$368.8K
- Jul 2019Seed$624.9K
#7
Series A · London, England · founded 2011 · 12 employees$3.7Mraised▾
Sunstone Systems is an off-grid surveillance & communication technology solutions provider. Some of their products include solar CCTV systems, solar-powered Autonomous Remote Communications (ARC) systems, solar power stations, and others. It can be deployed for surveillance and internet connectivity in remote areas. Features include HD CCTV, thermal imaging and auto-tracking.
- Aug 2023Series A$643K
- Jun 2022Series A$1.1M
- Jun 2021Series A—
- Apr 2021Series A$720.8K
#8
Acquired · London, England · founded 2015 · 22 employees$117.5Mraised▾
Lekela Power is a pan-African renewable energy generation platform focusing on wind and solar and delivering wind and solar power in Africa. Lekela is sponsoring the Global African Investment Summit in London.
- Sep 2016Conventional Debt$250M
- Jun 2016Series B$117.5M
- Feb 2015Seed—
#9
Acquired · London, England · founded 1998 · 121 employees$38.3Mraised▾
Solarcentury is an EPC player that operates in the domain of solar energy. The company builds solar systems for investors, businesses and homeowners in various sizes, right from utility scale to household scale. They claim to have installed over 750 MWp, across 1000 sites around the world and have solarised over 25000 homes.
- Sep 2020Grant (prize money)$366.4K
- Jun 2020Conventional Debt$48.8M
- Jan 2020Conventional Debt$62.5M
- Sep 2014Series E—
#10
Acquired · London, England · founded 2015$6.2Mraised▾
Developer of renewable energy solutions, assisting businesses with sustainable power. They offer expertise across project development, design, build, and operations management. The company delivers long-term solutions to energy and environmental problems. It provides solar solutions, energy storage systems, and power purchase agreements.
- Apr 2023Conventional Debt$6.2M
#11
Seed · London, England · founded 2010 · 36 employees$1.3Mraised▾
Provider of solar energy services for residential & commercial
- Feb 2024Seed$1.3M
#12
Seed · London, England · founded 2022 · 2 employees$1.5Mraised▾
Company dedicated to simplifying the adoption of residential solar energy. It provides end-to-end solar installations, including free on-site surveys, accurate design and quotes, and fully accredited professional installations.
- Jun 2023Seed$1.5M
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Solar Energy coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on Solar Pv in London is moving
A read on the academic research around Solar Pv in London — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 339 papers.
Imperial College London and UCL lead London's solar-PV research, focusing predominantly on perovskite materials and organic photovoltaics, with an optimistic advancement-driven tone across 339 papers.
- Imperial College London196
- University College London71
- Brunel University of London29
- Queen Mary University of London28
- London South Bank University14
- Thermal1→6
- Biomass (ecology)1→4
- Photocurrent2→4
- Absorption (acoustics)1→3
- Energy conversion efficiency1→3
- Photovoltaic system4→44
- Solar energy3→35
- Perovskite (structure)3→17
- Solar cell3→11
- Electricity generation1→8
- Photovoltaic system4→21
- Solar energy4→21
- Renewable energy4→16
- Perovskite (structure)3→6
- Process engineering1→4