Company lists · Data refreshed September 2026

Top 25 Renewable energy electrical contractors based in the United Kingdom

Name: Renewable energy electrical contractors based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 3,233 companies tracked

RevenueBase identified 3,233 company matches for renewable energy electrical contractors associated with the United Kingdom as of September 2026 and tracks 31,508 professional contacts across them, including 10,991 with verified work emails. London is the largest hub.

This list covers company matches for renewable energy electrical contractors associated with the 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

3,233Companies

31,508Contacts tracked

10,991Verified emails

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The 25 largest renewable energy electrical contractors based in the United Kingdom

Ranked by team size

Top 25 of 3,233 company matches for renewable energy electrical contractors based in the 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	RES	Exact match	Kings Langley, United KingdomHQ recorded Sep 17, 2026	1,001-5,000	3,721 contacts →
	Exact match “RES is the world’s largest independent renewable energy company, working across 24 countries and active in wind, solar, energy storage, green hydrogen, transmission, and…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2	Dalkia UK	Exact match	London, United KingdomHQ recorded Sep 17, 2026	5,001-10,000	1,064 contacts →
	Exact match “Together, we’re delivering technical solutions for a better society and an Electric Britain Dalkia is one of the UK’s leading technical and energy services providers at the…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3	Kelly Group	Exact match	Wembley, United KingdomHQ recorded Sep 17, 2026	1,001-5,000	1,053 contacts →
	Exact match “Established in 1985 to support the emerging UK cable television market, Kelly Group has diversified to meet the needs of our clients.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4	Freedom	Exact match	Leeds, United KingdomHQ recorded Sep 17, 2026	1,001-5,000	664 contacts →
	Exact match “Freedom is a leading provider of facilities and power engineering services.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	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
6	Enerveo	Exact match	Birmingham, United KingdomHQ recorded Sep 17, 2026	1,001-5,000	384 contacts →
	Exact match “Enerveo is a multi-disciplinary contracting business, with the skills and expertise to deliver complex projects in complex environments across a number of different service lines.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	SO Energy	Exact match	London, United KingdomHQ recorded Sep 17, 2026	201-500	378 contacts →
	Exact match “We do energy, you do you.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	Brush Group	Exact match	Loughborough, United KingdomHQ recorded Sep 17, 2026	501-1,000	367 contacts →
	Exact match “We support the global drive to net zero with innovative, engineered solutions that address grid resilience and systems challenges, facilitate electrification of transport and…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	Clarkson Evans LTD	Exact match	Gloucester, United KingdomHQ recorded Sep 17, 2026	501-1,000	331 contacts →
	Exact match “With over 850 staff, we are one of the UK’s leading electrical contractors and solar PV installers.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	Avk-Seg	Exact match	Maidenhead, United KingdomHQ recorded Sep 17, 2026	201-500	272 contacts →
	Exact match “AVK is the largest and fastest-growing supplier of innovative power solutions for data centres, AI infrastructure and leading organisations in the UK and Europe.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	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
12	Ethical Power	Exact match	Exeter, United KingdomHQ recorded Sep 17, 2026	51-200	231 contacts →
	Exact match “Ethical Power Group launched in the UK in 2010.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	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
14	British Solar Renewables	Exact match	Shepton Mallet, United KingdomHQ recorded Sep 17, 2026	51-200	148 contacts →
	Exact match “Clean energy, powered with purpose.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15	Irwin M&e	Exact match	Portadown, United KingdomHQ recorded Sep 17, 2026	201-500	134 contacts →
	Exact match “We provide a full range of Mechanical, Electrical, Energy and Renewables installation and maintenance services to clients, across both public and private sectors throughout the UK…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	Smith & Byford	Exact match	Cheam, United KingdomHQ recorded Sep 17, 2026	201-500	132 contacts →
	Exact match “Smith & Byford is a family-owned and operated building services company.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17	Windhoist	Exact match	Glasgow, United KingdomHQ recorded Sep 17, 2026	201-500	130 contacts →
	Exact match “Windhoist is a leading wind turbine installation contractor offering heavy cranage, mechanical and electrical services to principal wind turbine suppliers in the global market.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18	Bryt Energy	Exact match	Birmingham, United KingdomHQ recorded Sep 17, 2026	51-200	129 contacts →
	Exact match “Part of the Statkraft group, we provide British businesses with zero carbon, 100% renewable electricity*, sourced solely from Solar, Wind and Hydro.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19	Powersystems	Exact match	Bristol, United KingdomHQ recorded Sep 17, 2026	51-200	126 contacts →
	Exact match “Powered by People.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20	Project Solar UK	Exact match	Burton On Trent, United KingdomHQ recorded Sep 17, 2026	201-500	122 contacts →
	Exact match “Project Solar UK Ltd are a well-established Renewable Energy company.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21	EDF Renewables UK & Ireland	Exact match	London, United KingdomHQ recorded Sep 17, 2026	501-1,000	117 contacts →
	Exact match “EDF Renewables is part of one of the world’s leading renewable energy companies in the UK.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22	BOXT	Exact match	Leeds, United KingdomHQ recorded Sep 17, 2026	51-200	116 contacts →
	Exact match “We started out as a trailblazing boiler installation company in 2017 – the first to offer everything effortlessly online.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23	Sunel Group	Exact match	London, United KingdomHQ recorded Sep 17, 2026	201-500	113 contacts →
	Exact match “SUNEL GROUP is a globally recognized EPC Contractor and Developer for Solar projects.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24	Darke & Taylor LTD	Exact match	Oxfordshire, United KingdomHQ recorded Sep 17, 2026	51-200	112 contacts →
	Exact match “Our mission is to excel in the design, installation and maintenance of the electro-technical systems that connect to create fit for purpose building environments.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25	AES	Exact match	Enfield, United KingdomHQ recorded Sep 17, 2026	201-500	112 contacts →
	Exact match “As renewable energy technology experts, we have the knowledge and skills to help commercial clients switch to a greener, lower cost and more independent energy source.” 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 electrical contractors”. 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 3,233 renewable energy electrical contractors based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 10,991 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Renewable energy electrical contractors based in the United Kingdom at a glance

As of Sep 17, 2026

34.9%Verified-email coverage

9.7Average contacts per company

1-10Median size (employees)

7.4%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

1,796

11-50

1,127

51-200

222

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 3,233 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 the United Kingdom whose business descriptions match “renewable energy electrical contractors” 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 10,991 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 electrical contractors by metro

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 electrical contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many renewable energy electrical contractors are there based in the United Kingdom?

RevenueBase identified 3,233 company matches for renewable energy electrical contractors associated with the 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?

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

Which city has the most renewable energy electrical contractors?

London leads with 238 company records, followed by Manchester (56) and Glasgow (55).

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 10,991 professional contacts with verified work emails tracked across these 3,233 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.