Best Renewable Energy Tech Companies in London, United Kingdom
The 71 best Renewable Energy Tech companies in London, United Kingdom in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Kinetics.
Ranked: Best Renewable Energy Tech companies in London
| # | Company | Disclosed funding | Last round | Stage | Founder | Founded | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Kinetics Developer of floating LNG assets and renewable energy platforms 60Funding top 27%Patents top 28%Innovation top 36%Talent bottom 49% All 5 signals ▾Fundingtop 27% Patentstop 28% Innovationtop 36% Talentbottom 49% Globalbottom 43% Funding: Raised $400M across 1 rounds · 1 rounds over 1 yrs (1.0/yr) Patents: 64 patents matched (strict assignee match) · 57 filings since 2022 vs 7 in 2017-21 rank vs industry peers · Fliar Intelligence Index 60/100 | $400M | 7 mo ago | Funding Raised | Mehmet Katmer CEO | 2024 | — | 64 patents Patents concentrated in computing, sensing & instrumentation | — |
| 2 | Field Energy Developer of battery storage systems for renewable energy grid infrastructure | $295M | 35 mo ago | Series D | Michael Schieben Co-Founder | 2020 | Node.jsTailwind CSSReact+9 | — | — |
| 3 | Kraken Provider of utility management solution 83Funding top 22%Fin. health top 23%Tech top 32%Growth top 33% All 9 signals ▾Fundingtop 22% Fin. healthtop 23% Techtop 32% Growthtop 33% Talenttop 38% Markettop 41% AItop 45% Globalbottom 39% Moatbottom 38% Funding: Raised $150M across 1 rounds · 1 rounds over 1 yrs (1.0/yr) Fin. health: Revenue ~$171M · Revenue 1.1x total funding rank vs industry peers · Fliar Intelligence Index 83/100 | $150M | 5 mo ago | Series D | Matthew Potts Co-Founder | 2019 | StoryblokTurbopackstyled-components+23 | — | — |
| 4 | Rivan Manufacturer of synthetic natural gas using carbon capture and electrolysis 40Funding top 35%Growth top 35%Talent bottom 49%Global bottom 45% All 6 signals ▾Fundingtop 35% Growthtop 35% Talentbottom 49% Globalbottom 45% Marketbottom 37% Techbottom 36% Funding: Raised $47.5M across 3 rounds · 3 rounds over 2 yrs (1.5/yr) Growth: Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 40/100 | $48M | 2 mo ago | Series A | Harvey Hodd Founder & CEO | 2001 | WordPress Block EditorWordPressMySQL+12 | — | 1 expansion |
| 5 | Moixa Provider of residential energy storage solutions | $38M | 60 mo ago | Acquired | — | 2006 | WordPressApple iCloud MailGoogle Workspace+21 | — | — |
| 6 | Powervault Manufacturer of solar energy storage batteries and energy management software | $22M | 38 mo ago | Series C | — | 2012 | WordPressPleskMySQL+20 | 7 patents Battery energy storage systems and smart energy management software | 2 launchs · 1 partnership |
| 7 | tem Provider of renewable electricity semiconductors manufacturing services 53Talent top 23%Growth top 28%News top 32%Funding top 33% All 9 signals ▾Talenttop 23% Growthtop 28% Newstop 32% Fundingtop 33% Techtop 33% Partnerstop 45% Moatbottom 38% Globalbottom 37% Marketbottom 22% Talent: 6 named leaders on record · 5 C-suite/founder profiles curated Growth: Web rank 50,000,000 → 10,000,000 YoY · Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 53/100 | $17M | 4 mo ago | Series B | Jason Stocks Co-Founder & CCO | 2021 | StoryblokApple iCloud MailGoogle Workspace+25 | — | 1 job opening · 1 launch · 1 award |
| 8 | Sunsave Provider of residential solar energy systems through a subscription model 57Tech top 23%Growth top 25%News top 28%Talent top 38% All 8 signals ▾Techtop 23% Growthtop 25% Newstop 28% Talenttop 38% Fundingtop 39% Moattop 48% Globalbottom 39% Marketbottom 28% Tech: 32 technologies across 6/8 capability areas · Cloud: Amazon Cloudfront, Amazon Ses Growth: Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 57/100 | $12M | 11 mo ago | Series A | Alick Dru Co-Founder & CEO | 2022 | PrismicSentryNode.js+29 | — | 1 launch |
| 9 | Solivus Provider of lightweight solar energy solutions for large commercial buildings and complex rooftops | $7M | 35 mo ago | Seed | Joanna Swift Founder & CEO | 2016 | WebflowTypekitGoogle Font API+17 | 48 patents Integrated solar-powered off‑grid cabins and commercial roof energy systems | — |
| 10 | Inaccess Develops Infrastructure for Control & Monitoring | $7M | 154 mo ago | Acquired | — | 2000 | — | — | — |
| 11 | SEaB Developer of energy from micro waste | $4M | 40 mo ago | Seed | Sandra Sassow CEO & Co-Founder | 2008 | WordPressMySQLPHP+22 | — | — |
| 12 | RheEnergise Developer of high-density hydro long-duration energy storage technology 24Talent top 28%Patents top 38%Moat top 42%Innovation top 48% All 8 signals ▾Talenttop 28% Patentstop 38% Moattop 42% Innovationtop 48% Techbottom 45% Fundingbottom 44% Globalbottom 40% Marketbottom 19% Talent: 3 named leaders on record · 3 C-suite/founder profiles curated Patents: 19 patents matched (strict assignee match) · 19 filings since 2022 vs 0 in 2017-21 rank vs industry peers · Fliar Intelligence Index 24/100 | $3M | 6 mo ago | Seed | Graham Cook Co-Founder & CFO | 2019 | MyWebsiteDudaMyWebsite Creator+18 | 19 patents Patents concentrated in mechanical & energy engineering | — |
| 13 | IPG Provider of energy waste heat recovery using thermoelectric generators | $3M | 63 mo ago | Deadpooled | Martin Turner Co-Founder | 2016 | — | — | — |
| 14 | Trillion Fund Equity-based rowdfunding platform for energy projects | $3M | 138 mo ago | Deadpooled | — | 2011 | — | — | — |
| 15 | Metris Manufacturer of solar energy | $3M | 28 mo ago | Seed | William Whatley Co-Founder / CTO | 2023 | ContentfulNode.jsTypeScript+17 | 3 patents Optical scanning probe microscopy technologies | 1 job opening |
| 16 | Renew Risk Provider of risk modeling and analytics software | $2M | 16 mo ago | Series A | Ashima Gupta Co-Founder & CEO | 2021 | TypeScriptGraphQLNode.js+7 | 3 patents Predictive downtime analytics for asset management using data-driven algorithms | — |
| 17 | ACTIVEWATER TECHNOLOGY Provider of solar-powered water and soil treatment solutions for agriculture | $2M | 35 mo ago | Seed | Zac Gazit CEO & MD | 2019 | — | — | — |
| 18 | Renewabl Provider of renewable energy procurement, data management, and reporting solutions | $1M | 22 mo ago | Seed | Nikolaj Martyniuk Co-Founder | 2023 | WebflowAmazon Web ServicesHubSpot+18 | — | 1 award |
| 19 | IPG Developer of fuel-flexible power generation technology for various industry applications | $1M | 48 mo ago | Seed | John Grainger CTO and Founder | 2016 | — | — | — |
| 20 | Zeigo Provider of software for businesses to manage and reduce carbon emissions | $1M | 74 mo ago | Acquired | — | 2018 | — | — | — |
| 21 | FT Technologies Manufacturer of acoustic resonance wind sensors for various industrial applications | $774K | 65 mo ago | Funding Raised | Savvas Kapartis Chairman | 1981 | HubSpot CMS HubTailwind CSSAmazon Web Services+13 | — | — |
| 22 | Levistor Provider of kinetic energy-enabled electric vehicle charging solutions | $757K | 48 mo ago | Funding Raised | Matthew Journee CEO | 2020 | — | 24 patents Patents concentrated in mechanical & energy engineering | — |
| 23 | CCell Oscillating surge wave converter technology developer | $693K | 47 mo ago | Seed | — | 2014 | — | — | — |
| 24 | Sitigrid Provider of AI-driven P2P power trading solutions | $594K | 57 mo ago | Seed | Emmanuel Igbinovia Founder | 2019 | — | — | — |
| 25 | Hydrogen Future Industries Developer of systems for green hydrogen production and energy storage | $587K | 28 mo ago | Seed | Fungai Ndoro Director | 2021 | WordPressMySQLPHP+17 | — | — |
| 26 | SUNNTICS Provider of AI tools for CSP plants | $459K | 86 mo ago | Seed | Manuel Quero CEO | 2017 | — | — | — |
| 27 | Empati Developer of AI infrastructure using renewable energy and carbon displacement | $423K | 61 mo ago | Seed | — | 2019 | — | 11 patents Patents concentrated in computing, sensing & instrumentation | — |
| 28 | Charm Impact Crowdfunding platform focused on clean energy projects | $358K | 68 mo ago | Seed | Gavriel Landau Co-Founder | 2019 | RequireJSHSTSGoogle Workspace+1 | — | — |
| 29 | Verv Cryptocurrency designed for P2P renewable energy trading platform | $344K | 97 mo ago | Deadpooled | — | 2018 | — | — | — |
| 30 | Global OTEC Developer of ocean thermal energy conversion technology for clean power | $319K | 28 mo ago | Seed | Dan Grech Founder & CEO | 2017 | WordPress Block EditorWordPressMySQL+23 | — | — |
| 31 | EcoPowerSoft Provider of monitoring and diagnostics solutions for power generation assets | $104K | 106 mo ago | Seed | Dan Pickett CEO | 2017 | — | — | — |
| 32 | Dare Provider of liquidity and value across global commodities markets | $36K | 107 mo ago | Seed | Ayman Rahman Founder & CEO | 2016 | Apple iCloud MailMicrosoft 365Ruby+13 | — | — |
Top 12 Renewable Energy Tech companies in London
#1
Funding Raised · London, England · founded 2024$400Mraised▾
Developer of floating LNG assets and renewable energy platforms. It builds, develops, delivers, and leases these assets. The company specializes in battery energy storage systems. It aims to meet the needs of utilities, governments, and independent power producers. The company focuses on redefining energy infrastructure deployment and access in a decarbonizing world.
- Nov 2025Conventional Debt$400M
#2
Series A · London, England · founded 2001$47.5Mraised▾
Manufacturer of synthetic natural gas using carbon capture and electrolysis. This process utilizes water electrolysis and carbon dioxide capture to produce methane. The resulting fuel serves as a drop-in replacement for conventional natural gas in industrial applications that cannot be powered by electricity. The production method integrates solar energy to facilitate the conversion of captured carbon and hydrogen into fuel.
- Apr 2026Series A$34M
- Jul 2025Seed$253.8K
- Nov 2024Seed$13.3M
#3
Series D · London, England · founded 2019 · 376 employees$150Mraised▾
Provider of utility management solution. It offers an energy tech platform based on data and machine learning capabilities. It specializes in customer information systems including billing.
- Dec 2025Series D$150M
#4
Series B · London, England · founded 2021 · 6 employees$16.9Mraised▾
Provider of renewable electricity semiconductors manufacturing services. It operates a platform called renewable energy direct (RED), which connects businesses directly with UK-based renewable energy generators, bypassing traditional energy wholesalers and utilities. This approach eliminates middlemen and associated markups, resulting in lower costs for businesses and more revenue for renewable generators.
- Feb 2026Series B$75M
- May 2024Series A$13.7M
- Jun 2023Seed$3.1M
- Dec 2022Seed$3.2M
#5
Seed · London, England · founded 2019 · 10 employees$3.2Mraised▾
Developer of high-density hydro long-duration energy storage technology. The company focuses on improving traditional pumped-hydro storage by using a fluid that is denser than water. It operates in the renewable-energy and grid-storage sector, especially long-duration energy storage. It works during low-demand periods, electricity from renewable sources is used to pump the dense fluid uphill into storage tanks. It addresses the need for large-scale, long-duration energy storage to decarbonize energy systems. It provides a low-cost, scalable, and clean solution for balancing intermittent renewable energy sources with demand.
- Dec 2025Seed$158.1K
- Jul 2025Grant (prize money)$2.9M
- Feb 2024Seed$424K
- Mar 2022Seed$1.7M
#6
Series A · London, England · founded 2022 · 7 employees$11.6Mraised▾
Provider of residential solar energy systems through a subscription model. This business installs solar panels and battery storage units for homeowners. The service includes system design, installation, and ongoing maintenance. Customers pay a fixed monthly fee for the equipment and monitoring services. The hardware allows households to generate electricity, store excess power in batteries, and export surplus energy to the electrical grid. The subscription includes equipment replacement and insurance coverage for the duration of the agreement. Homeowners retain ownership of the installed hardware from the start of the contract.
- Jul 2025Conventional Debt$133.7M
- Feb 2025Series A$17.4M
- May 2023Seed$6.7M
- Nov 2022Seed$266.8K
#7
Series D · London, England · founded 2020 · 65 employees$294.8Mraised▾
Developer of battery storage systems for renewable energy grid infrastructure. These systems store electricity to balance supply and demand within power grids. The business focuses on the construction and optimization of energy storage assets to support the integration of renewable power sources.
- Jul 2023Series D$258M
- Jun 2022Series C$36.8M
- Apr 2022Conventional Debt$59.9M
#8
Series A · London, England · founded 2021 · 5 employees$2.1Mraised▾
Provider of risk modeling and analytics software. It aims to improve the financial lifecycle of large renewable projects.
- Feb 2025Series A$6.1M
- Sep 2023Seed$2.1M
#9
Series C · London, England · founded 2012 · 20 employees$22.4Mraised▾
Manufacturer of solar energy storage batteries and energy management software. These systems store electricity generated from solar panels for later use. The hardware integrates with residential solar installations to manage energy consumption and storage schedules. Predictive technology monitors energy production and usage to optimize battery performance. Users access energy data and system settings through a digital portal.
- Apr 2023Series C$4.7M
- Dec 2022Series C$9.2M
- Jun 2020Conventional Debt$909.5K
- Jun 2020Series B$1.6M
#10
Seed · London, England · founded 2023 · 2 employees$1.4Mraised▾
Provider of renewable energy procurement, data management, and reporting solutions. The company facilitates tenders for power purchase agreements and renewable energy certificates. It offers a platform to manage clean energy data and track carbon-free energy scores. The company also provides advisory services to assess data readiness and support target setting.
- Jul 2024Seed—
- Jun 2023Seed$1.4M
#11
Acquired · London, England · founded 2006 · 2 employees$38.2Mraised▾
Provider of residential energy storage solutions. It develops software and hardware to optimize the use of renewable energy. It offers smart battery systems that can be installed alongside solar panels to maximize the use of solar energy in the home. It also enables residential storage users to connect the battery to the grid to store the energy.
- Jun 2021Series C$8M
- Jul 2020Series C$5.8M
- Jan 2019Series A$11.2M
- Dec 2017Series A$7.4M
#12
Seed · London, England · founded 2016 · 11 employees$6.9Mraised▾
Provider of lightweight solar energy solutions for large commercial buildings and complex rooftops. It designs and installs innovative solar panels that are discreet, durable, and efficient. The technology enables businesses to harness clean energy even on structures unsuitable for traditional solar installations. It aims to support the transition to net-zero by offering scalable renewable energy systems. Its solutions help reduce carbon footprints while lowering long-term energy costs for clients.
- Jun 2023Seed—
- Jan 2022Seed$3.2M
- Dec 2020Seed$1.1M
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Renewable Energy Tech coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on Green Hydrogen in London is moving
A read on the academic research around Green Hydrogen in London — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 331 papers.
- Imperial College London174
- University College London109
- Brunel University of London23
- Queen Mary University of London21
- London South Bank University7
- Hydrogen production7→30
- Catalysis1→9
- Oxygen evolution1→5
- Photocatalysis7→10
- Production (economics)2→4
- Hydrogen production17→65
- Renewable energy2→17
- Production (economics)7→20
- Catalysis10→23
- Photocatalysis8→20
- Hydrogen production4→20
- Renewable energy1→11
- Hydrogen economy1→10
- Production (economics)2→9
- Fossil fuel1→7
Common questions
Riya reads income statements for fun. She covers the real money in a sector — revenue, growth, who actually earns — and never met a vague claim she didn't want a number for.