Company lists · Data refreshed September 2026

Top 25 Renewable energy engineering firms based in London, United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 232 companies tracked

RevenueBase identified 232 company matches for renewable energy engineering firms associated with London, United Kingdom as of September 2026 and tracks 5,178 professional contacts across them, including 2,223 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers company matches for renewable energy engineering firms associated with London, United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 17, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 17, 2026 How this list was built

232Companies

5,178Contacts tracked

2,223Verified emails

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The 25 largest renewable energy engineering firms based in London, United Kingdom

Ranked by team size

Top 25 of 232 company matches for renewable energy engineering firms based in London, United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Penspen	Exact match	London, United KingdomHQ recorded Sep 17, 2026	1,001-5,000	1,007 contacts →
	Exact match “Penspen designs, maintains, and optimises energy infrastructure to improve access to secure and sustainable energy for communities worldwide.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2	Sonnedix	Exact match	London, United KingdomHQ recorded Sep 17, 2026	501-1,000	563 contacts →
	Exact match “Sonnedix is a global renewable energy company delivering 100% clean electricity directly to customers through a diversified portfolio of solar, wind, and storage assets.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3	Cubico Sustainable Investments	Exact match	London, United KingdomHQ recorded Sep 17, 2026	501-1,000	406 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4	Intec Energy Solutions	Exact match	London, United KingdomHQ recorded Sep 17, 2026	501-1,000	242 contacts →
	Exact match “INTEC Energy Solutions delivers best-in-class services in Engineering, Procurement, Construction (EPC), Battery Energy Storage Systems (BESS), Manufacturing, Project Development…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	OWC	Exact match	London, United KingdomHQ recorded Sep 17, 2026	51-200	185 contacts →
	Exact match “The Renewable Energy Consultants.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	Wood Thilsted	Exact match	London, United KingdomHQ recorded Sep 17, 2026	51-200	175 contacts →
	Exact match “Wood Thilsted is a world-leading renewable energy engineering consultancy experienced and specialised in offshore wind.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	CFP Energy	Exact match	London, United KingdomHQ recorded Sep 17, 2026	201-500	171 contacts →
	Exact match “CFP Energy is a leading provider of energy and environmental solutions for industrial and commercial clients.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	Octopus Energy Generation	Exact match	London, United KingdomHQ recorded Sep 17, 2026	201-500	153 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	JD Ross Energy	Exact match	London, United KingdomHQ recorded Sep 17, 2026	201-500	143 contacts →
	Exact match “JD Ross Energy is an international talent consultancy that solely focuses on the Renewable Energy sector, connecting the best talent across the globe with companies that are…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	Longitude Engineering	Exact match	London, United KingdomHQ recorded Sep 17, 2026	51-200	138 contacts →
	Exact match “The Engineering Consultants.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	Alfa Energy An Edison Energy Company	Exact match	London, United KingdomHQ recorded Sep 17, 2026	201-500	88 contacts →
	Exact match “Alfa Energy Group (an Edison Energy company) is an international energy, sustainability and technology consultant partner with 200 employees over four international locations.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	Purdy Part Of Sureserve	Exact match	London, United KingdomHQ recorded Sep 17, 2026	201-500	85 contacts →
	Exact match “Who are we?” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	AMD Group	Exact match	London, United KingdomHQ recorded Sep 17, 2026	11-50	82 contacts →
	Exact match “AMD Environmental are a collaborative Mechanical and Electrical Design and Build Engineering specialist with a sustainable approach in delivering challenging and bespoke projects…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14	Innova	Exact match	London, United KingdomHQ recorded Sep 17, 2026	51-200	77 contacts →
	Exact match “Innova is a forward-thinking renewable energy business, employing people across two offices in London and Cheltenham.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15	Wattstor	Exact match	London, United KingdomHQ recorded Sep 17, 2026	51-200	70 contacts →
	Exact match “Think Outside The Grid.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	Elements Green	Exact match	London, United KingdomHQ recorded Sep 17, 2026	51-200	51 contacts →
	Exact match “Elements Green (EG) is a leading renewable energy developer headquartered in London, specialising in utility-scale solar PV systems and battery energy storage solutions.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17	AVA Energy	Exact match	London, United KingdomHQ recorded Sep 17, 2026	11-50	47 contacts →
	Exact match “AVA Energy – Powering Energy Talent.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18	Natpower UK	Exact match	London, United KingdomHQ recorded Sep 17, 2026	51-200	38 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19	Syzygy	Exact match	London, United KingdomHQ recorded Sep 17, 2026	11-50	35 contacts →
	Exact match “Founded in 2010, Syzygy is the leading specialist low carbon technology consultancy for the real estate sector.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20	Integration	Exact match	London, United KingdomHQ recorded Sep 17, 2026	11-50	34 contacts →
	Exact match “We’re helping to create a world where every building is truly zero carbon.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21	Infinity Renewables Group	Exact match	London, United KingdomHQ recorded Sep 17, 2026	51-200	32 contacts →
	Exact match “Infinity is a leading full service residential and commercial solar provider.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22	Enlist Solution	Exact match	London, United KingdomHQ recorded Sep 17, 2026	11-50	31 contacts →
	Exact match “We are an International Solution Provider with Offices in the United Kingdom and Europe.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23	DSA Engineering LTD	Exact match	London, United KingdomHQ recorded Sep 17, 2026	11-50	30 contacts →
	Exact match “DSA Engineering is an engineering design consultancy with extensive experience in providing innovative multi-disciplinary engineering services.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24	Samuel Knight Energy	Exact match	London, United KingdomHQ recorded Sep 17, 2026	51-200	27 contacts →
	Exact match “Renewable Energy Staffing & Project Specialists across UK, EUROPE, USA, APAC.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25	Nexwell Power	Exact match	London, United KingdomHQ recorded Sep 17, 2026	11-50	27 contacts →
	Exact match “Part of the Nexwell Group” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “renewable energy engineering firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 232 renewable energy engineering firms based in London, United Kingdom

See the full list, filter by size, metro and specialty, and access 2,223 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Renewable energy engineering firms based in London, United Kingdom at a glance

As of Sep 17, 2026

42.9%Verified-email coverage

22.3Average contacts per company

1-10Median size (employees)

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

133

11-50

51-200

201-500

501-1,000

1,001-5,000

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 232 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with London, United Kingdom whose business descriptions match “renewable energy engineering firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 2,223 professional contacts with verified work emails across the full matched dataset. 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 17, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Renewable energy engineering firms by metro in the United Kingdom

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “renewable energy engineering firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many renewable energy engineering firms are there based in London, United Kingdom?

RevenueBase identified 232 company matches for renewable energy engineering firms associated with London, United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Penspen tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United Kingdom has the most renewable energy engineering firms?

London leads the United Kingdom with 232 company records, followed by Glasgow (34) and Manchester (27).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 2,223 professional contacts with verified work emails tracked across these 232 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 17, 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 SmartSearch, 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.