Company lists · Data refreshed September 2026

Top 25 Sustainable energy contractors based in London, United Kingdom

Name: Sustainable energy contractors based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 18, 2026 298 companies tracked

RevenueBase identified 298 sustainable energy contractors headquartered in London, United Kingdom as of September 2026 and tracks 8,182 professional contacts across them, including 2,830 with verified work emails. London is the largest hub.

This list covers sustainable energy contractors headquartered in London, United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 18, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 18, 2026 86% judged on-target in blind review

298Companies

8,182Contacts tracked

2,830Verified emails

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The 25 largest sustainable energy contractors based in London, United Kingdom

Ranked by team size

Top 25 of 298 sustainable energy contractors based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 18, 2026. RevenueBase Smart Search rates how each company's information relates to sustainable energy contractors: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Lightsource BP	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	1,001-5,000	1,114 contacts →
	Partial evidence “Lightsource bp is working to support a future powered by renewable, affordable and reliable energy that benefits our partners, people and planet.” Source: RevenueBase Database · checked Sep 18, 2026
2	Sonnedix	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	501-1,000	563 contacts →
	Partial evidence “Sonnedix is a global renewable energy company delivering 100% clean electricity directly to customers through a diversified portfolio of solar, wind, and storage assets.” Source: RevenueBase Database · checked Sep 18, 2026
3	Cubico Sustainable Investments	Strong evidence	London, United KingdomHQ checked Sep 18, 2026	501-1,000	406 contacts →
	Strong evidence “Cubico Sustainable Investments is one of the world’s largest privately-owned renewable energy companies, leveraging our strong local presence with a unique combination of in-house…” Source: RevenueBase Database · checked Sep 18, 2026
4	Reon Energy Limited	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	201-500	402 contacts →
	Partial evidence “Reon Energy is a leading Cleantech company deploying Intelligent Renewable Energy Microgrids across South Asia, GCC & African region.” Source: RevenueBase Database · checked Sep 18, 2026
5	SO Energy	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	201-500	378 contacts →
	Partial evidence “We do energy, you do you.” Source: RevenueBase Database · checked Sep 18, 2026
6	Intec Energy Solutions	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	501-1,000	242 contacts →
	Partial evidence “INTEC Energy Solutions delivers best-in-class services in Engineering, Procurement, Construction (EPC), Battery Energy Storage Systems (BESS), Manufacturing, Project Development…” Source: RevenueBase Database · checked Sep 18, 2026
7	OWC	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	51-200	185 contacts →
	Partial evidence “The Renewable Energy Consultants.” Source: RevenueBase Database · checked Sep 18, 2026
8	FIELD	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	51-200	179 contacts →
	Partial evidence “We're creating the renewable energy infrastructure and trading company of the future.” Source: RevenueBase Database · checked Sep 18, 2026
9	Wood Thilsted	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	51-200	175 contacts →
	Partial evidence “Wood Thilsted is a world-leading renewable energy engineering consultancy experienced and specialised in offshore wind.” Source: RevenueBase Database · checked Sep 18, 2026
10	CFP Energy	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	201-500	171 contacts →
	Partial evidence “CFP Energy is a leading provider of energy and environmental solutions for industrial and commercial clients.” Source: RevenueBase Database · checked Sep 18, 2026
11	Octopus Energy Generation	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	201-500	153 contacts →
	Partial evidence “At Octopus Energy Generation, we’re building green power for the future, from large-scale solar to onshore and offshore wind, and innovative initiatives like the Fan Club.” Source: RevenueBase Database · checked Sep 18, 2026
12	EDF Renewables UK & Ireland	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	501-1,000	117 contacts →
	Partial evidence “EDF Renewables is part of one of the world’s leading renewable energy companies in the UK.” Source: RevenueBase Database · checked Sep 18, 2026
13	Eenergy	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	51-200	98 contacts →
	Partial evidence “eEnergy (AIM: EAAS) is a UK-based Energy-as-a-Service (EaaS) provider, funding and delivering energy-saving and energy-generating solutions across multi-site public sector and…” Source: RevenueBase Database · checked Sep 18, 2026
14	Purdy Part Of Sureserve	Indirect evidence	London, United KingdomHQ checked Sep 18, 2026	201-500	85 contacts →
	Indirect evidence “Who are we?” Source: RevenueBase Database · checked Sep 18, 2026
15	AMD Group	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	11-50	82 contacts →
	Partial evidence “AMD Environmental are a collaborative Mechanical and Electrical Design and Build Engineering specialist with a sustainable approach in delivering challenging and bespoke projects…” Source: RevenueBase Database · checked Sep 18, 2026
16	Innova	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	51-200	77 contacts →
	Partial evidence “Innova is a forward-thinking renewable energy business, employing people across two offices in London and Cheltenham.” Source: RevenueBase Database · checked Sep 18, 2026
17	Wattstor	Indirect evidence	London, United KingdomHQ checked Sep 18, 2026	51-200	70 contacts →
	Indirect evidence “Think Outside The Grid.” Source: RevenueBase Database · checked Sep 18, 2026
18	Renewable Power Capital	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	51-200	51 contacts →
	Partial evidence “We invest in the development, construction, and long-term ownership of solar, onshore wind and battery storage projects, enabling the energy transition and driving stable…” Source: RevenueBase Database · checked Sep 18, 2026
19	Elements Green	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	51-200	51 contacts →
	Partial evidence “Elements Green (EG) is a leading renewable energy developer headquartered in London, specialising in utility-scale solar PV systems and battery energy storage solutions.” Source: RevenueBase Database · checked Sep 18, 2026
20	Electron Green	Indirect evidence	London, United KingdomHQ checked Sep 18, 2026	11-50	46 contacts →
	Indirect evidence “Electron Green provides a unique and simple route to low-cost solar electricity for businesses across Europe.” Source: RevenueBase Database · checked Sep 18, 2026
21	Golden Globe Merchants LTD	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	11-50	38 contacts →
	Partial evidence “At Golden Globe Merchants, we deliver high-performance, energy-efficient solutions designed to future-proof UK homes.” Source: RevenueBase Database · checked Sep 18, 2026
22	Natpower UK	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	51-200	38 contacts →
	Partial evidence “NatPower UK has the largest clean energy development programme in the UK, aiming at integrating large scale smart clean energy generation and distribution with large scale…” Source: RevenueBase Database · checked Sep 18, 2026
23	Pulse Clean Energy	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	11-50	35 contacts →
	Partial evidence “Through innovation in energy storage and optimisation, we will help to enable an energy network that runs entirely on renewables.” Source: RevenueBase Database · checked Sep 18, 2026
24	Syzygy	Indirect evidence	London, United KingdomHQ checked Sep 18, 2026	11-50	35 contacts →
	Indirect evidence “Founded in 2010, Syzygy is the leading specialist low carbon technology consultancy for the real estate sector.” Source: RevenueBase Database · checked Sep 18, 2026
25	Integration	Indirect evidence	London, United KingdomHQ checked Sep 18, 2026	11-50	34 contacts →
	Indirect evidence “We’re helping to create a world where every building is truly zero carbon.” Source: RevenueBase Database · checked Sep 18, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: sustainable energy contractors. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names sustainable energy contractors.
Partial evidence: Its own public description names part of sustainable energy contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainable energy contractors. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 298 sustainable energy contractors based in London, United Kingdom

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Sustainable energy contractors based in London, United Kingdom at a glance

As of Sep 18, 2026

34.6%Verified-email coverage

27.5Average contacts per company

11-50Median size (employees)

100.0%Largest-city concentration · London

Sep 18, 2026Page data refreshed

Companies by employee count

1-10

147

11-50

104

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 298 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among sustainable energy contractors, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in London, United Kingdom whose own description of what they do matches “sustainable energy contractors”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names sustainable energy contractors), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among sustainable energy contractors, and records with no verified work email. Companies headquartered outside London are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 2,830 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 18, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Sustainable energy contractors by metro in the United Kingdom

Sustainable energy contractors in London298
Sustainable energy contractors in Glasgow46
Sustainable energy contractors in Manchester43
Sustainable energy contractors in Bristol33
Sustainable energy contractors in Nottingham31
Sustainable energy contractors in Liverpool29
Sustainable energy contractors in Birmingham27
Sustainable energy contractors in Sheffield26

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names sustainable energy contractors, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many sustainable energy contractors are there based in London, United Kingdom?

RevenueBase identified 298 sustainable energy contractors headquartered in London, United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Lightsource BP, headquartered in London, tops this list with the largest team on record.

Which city has the most sustainable energy contractors?

London leads with 298 headquartered companies, followed by Glasgow (46) and Manchester (43).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 2,830 verified decision-maker contacts tracked across these 298 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 18, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.