# Top 50 Energy Startups in London by Funding (2026)

> The 50 best-funded energy startups in London, ranked by total funding raised: $5.8B combined. With founding year, headquarters and each company's rounds.

Source: https://millionrounds.com/top-lists/energy-startups-london (Millionrounds; every figure on the page links to its filing or article)

- 1 [**Renewable Power Capital** Renewable Power Capital is a renewable energy investment platform that focuses on energy industries.](https://millionrounds.com/company/renewable-power-capital) Renewable Power Capital is a renewable energy investment platform that focuses on energy industries. *Founded* 2020 London, United Kingdom **$915M** last round Sept 2026
- 2 [**Eelpower** Eelpower is a battery storage developer that operates energy storage solutions.](https://millionrounds.com/company/eelpower) Eelpower is a battery storage developer that operates energy storage solutions. *Founded* 2017 London, United Kingdom **$682M** last round Aug 2025
- 3 [**Zenobe Energy** Zenobe Energy manufactures battery storage assets for electric bus operators, utilities, and industrial and commercial businesses.](https://millionrounds.com/company/zenobe-energy) Zenobe Energy manufactures battery storage assets for electric bus operators, utilities, and industrial and commercial businesses. *Founded* 2016 London, United Kingdom **$515M** last round Jun 2026
- 4 [**Agratas** Agrata's aim is to build world-class teams and provide best-in-class technologies.](https://millionrounds.com/company/agratas) Agrata's aim is to build world-class teams and provide best-in-class technologies. *Founded* - London, United Kingdom **$509M** last round Apr 2026
- 5 [**Octopus Renewables Infrastructure Trust** Octopus Renewables Infrastructure Trust is a closed end investment company incorporated in England and Wales.](https://millionrounds.com/company/octopus-renewables-infrastructure-trust) Octopus Renewables Infrastructure Trust is a closed end investment company incorporated in England and Wales. *Founded* 2019 London, United Kingdom **$431M** last round Feb 2025
- 6 [**Atrato Onsite Energy** Atrato Onsite Energy is a commercial rooftop solar funder.](https://millionrounds.com/company/atrato-onsite-energy) Atrato Onsite Energy is a commercial rooftop solar funder. *Founded* - London, United Kingdom **$327M** last round Apr 2025
- 7 [**Cero Generation** Cero Generation is a solar energy company that develops solar energy and energy storage solutions.](https://millionrounds.com/company/cero-generation) Cero Generation is a solar energy company that develops solar energy and energy storage solutions. *Founded* 2021 London, United Kingdom **$312M** last round Jul 2025
- 8 [**Statera Energy** Statera Energy is a company that generates, transmissions, and distributes electric energy.](https://millionrounds.com/company/statera-energy) Statera Energy is a company that generates, transmissions, and distributes electric energy. *Founded* 2015 London, United Kingdom **$307M** last round Nov 2025
- 9 [**AMPYR Solar Europe** AMPYR Solar Europe is an Independent electricity generator and solar development.](https://millionrounds.com/company/ampyr-solar-europe) AMPYR Solar Europe is an Independent electricity generator and solar development. *Founded* 2020 London, United Kingdom **$214M** last round Jun 2023
- 10 [**Flexion Energy** Flexion Energy is a modern utility and energy storage infrastructure specialist, which is bridging the gap between development and finance.](https://millionrounds.com/company/flexion-energy) Flexion Energy is a modern utility and energy storage infrastructure specialist, which is bridging the gap between development and finance. *Founded* 2014 London, United Kingdom **$207M** last round Jul 2021
- 11 [**Discover Exploration** Discover Exploration is an upstream oil & gas company with E&P assets in Europe, Africa and Australasia.](https://millionrounds.com/company/discover-exploration) Discover Exploration is an upstream oil & gas company with E&P assets in Europe, Africa and Australasia. *Founded* 2012 London, United Kingdom **$184M** last round Feb 2025
- 12 [**BBOXX** Bboxx manufactures plug and play solar systems.](https://millionrounds.com/company/bboxx) Bboxx manufactures plug and play solar systems. *Founded* 2010 London, United Kingdom **$167M** last round Apr 2025
- 13 [**Sunsave** Sunsave Group Ltd, also known as Sunsave Energy Limited, is a London-based renewable energy technology company founded in 2022 by Alick Dru and Ben Graves.](https://millionrounds.com/company/sunsave) Sunsave Group Ltd, also known as Sunsave Energy Limited, is a London-based renewable energy technology company founded in 2022 by Alick Dru and Ben Graves. *Founded* 2022 London, United Kingdom **$166M** last round Jul 2026
- 14 [**Fuse Energy** Fuse is an energy supplier that offers the UK's cheapest electricity tarif.](https://millionrounds.com/company/fuse-energy) Fuse is an energy supplier that offers the UK's cheapest electricity tarif. *Founded* 2022 London, United Kingdom **$111M** last round Jun 2026
- 15 [**Varco Energy** Varco Energy is a battery storage asset owner and operator.](https://millionrounds.com/company/varco-energy) Varco Energy is a battery storage asset owner and operator. *Founded* 2021 London, United Kingdom **$75M** last round Sept 2023
- 16 [**Tem** Tem Energy Limited, based in London, is an innovative energy technology company founded in 2021.](https://millionrounds.com/company/tem) Tem Energy Limited, based in London, is an innovative energy technology company founded in 2021. *Founded* 2021 London, United Kingdom **$75M** last round Feb 2026
- 17 [**Eku Energy** Eku Energy is a globally diversified and technology enabled energy storage business.](https://millionrounds.com/company/eku-energy) Eku Energy is a globally diversified and technology enabled energy storage business. *Founded* 2022 London, United Kingdom **$60M** last round May 2025
- 18 [**Isembard** Isembard is a British software-first manufacturing company founded in 2024.](https://millionrounds.com/company/isembard) Isembard is a British software-first manufacturing company founded in 2024. *Founded* 2024 London, United Kingdom **$59M** last round Mar 2026
- 19 [**Gaussion** Gaussion is a London-based technology company that specializes in MagLiBTM, an innovative magnetic lithium-ion battery charging technology.](https://millionrounds.com/company/gaussion) Gaussion is a London-based technology company that specializes in MagLiBTM, an innovative magnetic lithium-ion battery charging technology. *Founded* 2017 London, United Kingdom **$43M** last round Apr 2026
- 20 [**Axle Energy** Axle Energy Limited is a B2B energy technology startup based in London, UK, founded in early 2023 by Karl Bach and Archy de Berker.](https://millionrounds.com/company/axle-energy) Axle Energy Limited is a B2B energy technology startup based in London, UK, founded in early 2023 by Karl Bach and Archy de Berker. *Founded* 2023 London, United Kingdom **$43M** last round Jul 2026
- 21 [**Veremark** Veremark is a global B2B background screening and reference checking platform founded in 2018.](https://millionrounds.com/company/veremark) Veremark is a global B2B background screening and reference checking platform founded in 2018. *Founded* 2018 London, United Kingdom **$39M** last round May 2026
- 22 [**General Index** General Index is a technology-driven commodity pricing provider and benchmark administrator based in London, UK.](https://millionrounds.com/company/general-index) General Index is a technology-driven commodity pricing provider and benchmark administrator based in London, UK. *Founded* 2020 London, United Kingdom **$35M** last round Sept 2025
- 23 [**Rotherham Energy** Rotherham Energy provides plumbling, heating, and air conditioning installation.](https://millionrounds.com/company/rotherham-energy) Rotherham Energy provides plumbling, heating, and air conditioning installation. *Founded* 2022 London, United Kingdom **$31M** last round May 2023
- 24 [**Energy Drive Systems** Energy Drive Systems as a Service, Energy Efficiency](https://millionrounds.com/company/energy-drive-systems) Energy Drive Systems as a Service, Energy Efficiency *Founded* - London, United Kingdom **$27M** last round Jun 2025
- 25 [**Limejump** Limejump is a Technology-Driven Utility: harnessing the power of big data to positively disrupt and transform today’s energy market.](https://millionrounds.com/company/limejump) Limejump is a Technology-Driven Utility: harnessing the power of big data to positively disrupt and transform today’s energy market. *Founded* 2013 London, United Kingdom **$21M** last round Oct 2021
- 26 [**Excellence Logging** Excellence Logging, also known as Exlog, is a prominent independent global specialist in oilfield services, based in London, United Kingdom.](https://millionrounds.com/company/excellence-logging) Excellence Logging, also known as Exlog, is a prominent independent global specialist in oilfield services, based in London, United Kingdom. *Founded* 2015 London, United Kingdom **$21M** last round Aug 2024
- 27 [**Bradford Energy** Bradford Energy offers an air source heat pump heat network.](https://millionrounds.com/company/bradford-energy) Bradford Energy offers an air source heat pump heat network. *Founded* 2021 London, United Kingdom **$20M** last round May 2023
- 28 [**Gridcog** Gridcog is a B2B SaaS energy technology company based in London, United Kingdom, founded in 2020.](https://millionrounds.com/company/gridcog) Gridcog is a B2B SaaS energy technology company based in London, United Kingdom, founded in 2020. *Founded* 2020 London, United Kingdom **$18M** last round Jul 2026
- 29 [**Konexa** Konexa is an energy company that engages in the development and long-term management of integrated utility projects and renewable assets.](https://millionrounds.com/company/konexa) Konexa is an energy company that engages in the development and long-term management of integrated utility projects and renewable assets. *Founded* - London, United Kingdom **$18M** last round Mar 2024
- 30 [**Quantum Commodity Intelligence** Quantum Commodity Intelligence (QCI) is an independent Price Reporting Agency (PRA) focused on providing market intelligence for the energy transition and carbon markets.](https://millionrounds.com/company/quantum-commodity-intelligence) Quantum Commodity Intelligence (QCI) is an independent Price Reporting Agency (PRA) focused on providing market intelligence for the energy transition and carbon markets. *Founded* 2021 London, United Kingdom **$17M** last round Jul 2024
- 31 [**RFC Power** RFC Power is a global provider of long-duration energy storage solutions, focused on developing a low-cost hydrogen-manganese hybrid flow battery.](https://millionrounds.com/company/rfc-power) RFC Power is a global provider of long-duration energy storage solutions, focused on developing a low-cost hydrogen-manganese hybrid flow battery. *Founded* 2017 London, United Kingdom **$15M** last round Aug 2026
- 32 [**Volteras** Volteras is a London-based data streaming platform that acts as the intelligence layer for connected vehicle data.](https://millionrounds.com/company/volteras) Volteras is a London-based data streaming platform that acts as the intelligence layer for connected vehicle data. *Founded* 2020 London, United Kingdom **$15M** last round Apr 2025
- 33 [**Arborea** Arborea is a London-based biotechnology company founded in 2015, focused on industrializing photosynthesis to produce sustainable food ingredients.](https://millionrounds.com/company/arborea) Arborea is a London-based biotechnology company founded in 2015, focused on industrializing photosynthesis to produce sustainable food ingredients. *Founded* 2015 London, United Kingdom **$11M** last round Dec 2024
- 34 [**PerfectTed** PerfectTed is the leading matcha brand in the United Kingdom, specializing in high-quality, organic, ceremonial-grade matcha green tea products.](https://millionrounds.com/company/perfectted) PerfectTed is the leading matcha brand in the United Kingdom, specializing in high-quality, organic, ceremonial-grade matcha green tea products. *Founded* 2021 London, United Kingdom **$11M** last round Sept 2025
- 35 [**About:Energy** About:Energy is a battery intelligence platform that combines world-leading expertise in battery testing and software.](https://millionrounds.com/company/about-energy) About:Energy is a battery intelligence platform that combines world-leading expertise in battery testing and software. *Founded* 2021 London, United Kingdom **$10M** last round Mar 2026
- 36 [**Metris Energy** Metris Energy is the first AI-powered solar energy platform for commercial property owners.](https://millionrounds.com/company/metris-energy) Metris Energy is the first AI-powered solar energy platform for commercial property owners. *Founded* 2023 London, United Kingdom **$7.5M** last round Sept 2026
- 37 [**Chrysalix Technologies** Chrysalix Technologies has developing an innovative biomass fractionation process using low-cost ionic liquids.](https://millionrounds.com/company/chrysalix-technologies) Chrysalix Technologies has developing an innovative biomass fractionation process using low-cost ionic liquids. *Founded* 2017 London, United Kingdom **$7.4M** last round Jun 2022
- 38 [**AirEx Technologies** AirEx Technologies is a climate tech company based in London, UK, focused on addressing climate change and fuel poverty through innovative smart home solutions.](https://millionrounds.com/company/airex-technologies) AirEx Technologies is a climate tech company based in London, UK, focused on addressing climate change and fuel poverty through innovative smart home solutions. *Founded* 2016 London, United Kingdom **$7.1M** last round May 2026
- 39 [**SOLIVUS** SOLIVUS, based in London, is a UK-based renewable energy startup founded in 2016.](https://millionrounds.com/company/solivus) SOLIVUS, based in London, is a UK-based renewable energy startup founded in 2016. *Founded* 2016 London, United Kingdom **$7.1M** last round Nov 2025
- 40 [**powervault** Powervault is a UK-based green energy technology company founded in 2012, focused on designing and manufacturing sustainable energy storage systems for homes an](https://millionrounds.com/company/powervault) Powervault is a UK-based green energy technology company founded in 2012, focused on designing and manufacturing sustainable energy storage systems for homes an *Founded* 2012 London, United Kingdom **$5.9M** last round Feb 2023
- 41 [**Neptune Energy** Neptune Energy is an oil and gas exploration and production company.](https://millionrounds.com/company/neptune-energy) Neptune Energy is an oil and gas exploration and production company. *Founded* 2015 London, United Kingdom **$4.2M** last round Jul 2021
- 42 [**xWatts** xWatts, founded in August 2022 and based in Cambridge, United Kingdom, is a ClimateTech and SaaS company focused on intelligent energy management software for t](https://millionrounds.com/company/xwatts) xWatts, founded in August 2022 and based in Cambridge, United Kingdom, is a ClimateTech and SaaS company focused on intelligent energy management software for t *Founded* 2022 London, United Kingdom **$4.1M** last round Feb 2026
- 43 [**Deltic Energy** Deltic Energy is an AIM-listed natural resources investing company.](https://millionrounds.com/company/deltic-energy) Deltic Energy is an AIM-listed natural resources investing company. *Founded* 2012 London, United Kingdom **$4.0M** last round May 2026
- 44 [**Electric Miles** Electric Miles is a UK-based B2B SaaS cleantech company founded in 2017 and headquartered in London.](https://millionrounds.com/company/electric-miles) Electric Miles is a UK-based B2B SaaS cleantech company founded in 2017 and headquartered in London. *Founded* 2019 London, United Kingdom **$3.2M** last round Jan 2025
- 45 [**Elyos Energy** Elyos Energy is a software platform for energy optimization, flexibility, and demand response.](https://millionrounds.com/company/elyos-energy) Elyos Energy is a software platform for energy optimization, flexibility, and demand response. *Founded* 2023 London, United Kingdom **$3.0M** last round Oct 2023
- 46 [**AcouBatt** AcouBatt uses acoustic sensors and AI to monitor internal battery activity.](https://millionrounds.com/company/acoubatt) AcouBatt uses acoustic sensors and AI to monitor internal battery activity. *Founded* 2025 London, United Kingdom **$3.0M** last round Sept 2026
- 47 [**Allye** Allye is a London-based energy storage company that specializes in distributed battery storage and energy management solutions.](https://millionrounds.com/company/allye) Allye is a London-based energy storage company that specializes in distributed battery storage and energy management solutions. *Founded* 2023 London, United Kingdom **$2.5M** last round Mar 2026
- 48 [**Arcola Energy** Arcola Energy is a leader in hydrogen and fuel cell integration, specializing in zero-emission solutions for heavy-duty vehicles.](https://millionrounds.com/company/arcola-energy) Arcola Energy is a leader in hydrogen and fuel cell integration, specializing in zero-emission solutions for heavy-duty vehicles. *Founded* 2010 London, United Kingdom **$2.1M** last round Mar 2021
- 49 [**Gyre Energy** Gyre Energy is an Oxford-based company that develops AI-powered software solutions for the cooling and refrigeration industry.](https://millionrounds.com/company/gyre-energy) Gyre Energy is an Oxford-based company that develops AI-powered software solutions for the cooling and refrigeration industry. *Founded* 2025 London, United Kingdom **$2.1M** last round Jul 2026
- 50 [**AMTE Power** AMTE Power partners with niche customers to enable them to scale and transfer emerging new cell technologies to manufacture.](https://millionrounds.com/company/amte-power) AMTE Power partners with niche customers to enable them to scale and transfer emerging new cell technologies to manufacture. *Founded* - London, United Kingdom **$1.3M** last round Jul 2023

**Total funding** how the list is ranked

**15 November 2026** updated nightly

**Rounds we track** source: Millionrounds

Companies whose funding rounds we classed as this sector, ranked by the total they have raised in rounds we hold. Nobody pays to be on a list.

## Who backed them?

Open any company for its rounds and investors, or search the investors who back energy startups in London in the app, with filters, lists and exports.

[Find their investors](https://millionrounds.com/login?join=1&next=/app/investors)[All top lists](https://millionrounds.com/top-lists)

## More energy lists

[See all](https://millionrounds.com/top-lists?t=Energy)

[*CE* *C* *SE* **Energy startups worldwide** 1,800 companies · $129B](https://millionrounds.com/top-lists/energy-startups)[*CE* *C* *SE* **Energy startups in the United States** 741 companies · $110B](https://millionrounds.com/top-lists/energy-startups-united-states)[*N* *V* *S* **Energy startups in Europe** 607 companies · $39B](https://millionrounds.com/top-lists/energy-startups-europe)[*C* *ME* *W* **Energy startups that raised in 2026** 429 companies · $73B in 2026](https://millionrounds.com/top-lists/energy-startups-raised-2026)[*S* *RS* *C* **Energy startups in the United Kingdom** 206 companies · $15B](https://millionrounds.com/top-lists/energy-startups-united-kingdom)[*C* *ME* *W* **Energy startups in the United States that raised in 2026** 194 companies · $63B in 2026](https://millionrounds.com/top-lists/energy-startups-united-states-raised-2026)[*AE* *TE* *RS* **Energy startups founded in 2021** 111 companies · $8.5B](https://millionrounds.com/top-lists/energy-startups-founded-2021)[*V* *UC* *E* **Energy startups founded in 2020** 105 companies · $15B](https://millionrounds.com/top-lists/energy-startups-founded-2020)

## More lists for London

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[*F* *IL* *PD* **Startups in London** 3,521 companies · $51B](https://millionrounds.com/top-lists/startups-london)[*IL* *W* *U* **AI startups in London** 479 companies · $18B](https://millionrounds.com/top-lists/ai-startups-london)[*K* *F* *F* **IT Services startups in London** 400 companies · $3.0B](https://millionrounds.com/top-lists/it-services-startups-london)[*IL* *VB* *S* **Health startups in London** 300 companies · $9.9B](https://millionrounds.com/top-lists/health-startups-london)[*F* *FC* *R* **Financial Services startups in London** 282 companies · $22B](https://millionrounds.com/top-lists/financial-services-startups-london)[*IL* *OT* *M* **Healthcare startups in London** 191 companies · $6.9B](https://millionrounds.com/top-lists/healthcare-startups-london)[*FC* *R* *C* **Fintech startups in London** 166 companies · $15B](https://millionrounds.com/top-lists/fintech-startups-london)[*Q* *BS* *E* **Big Data & Analytics startups in London** 164 companies · $3.3B](https://millionrounds.com/top-lists/big-data-startups-london)