Company lists · Data refreshed September 2026

Top 25 Renewable energy equipment upgrade companies based in the United Kingdom

Name: Renewable energy equipment upgrade companies 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 2,451 companies tracked

RevenueBase identified 2,451 company matches for renewable energy equipment upgrade companies associated with the United Kingdom as of September 2026 and tracks 27,408 professional contacts across them, including 10,596 with verified work emails. London is the largest hub.

This list covers company matches for renewable energy equipment upgrade companies 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

2,451Companies

27,408Contacts tracked

10,596Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest renewable energy equipment upgrade companies based in the United Kingdom

Ranked by team size

Top 25 of 2,451 company matches for renewable energy equipment upgrade companies 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	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
5	Natural Power	Exact match	Castle Douglas, United KingdomHQ recorded Sep 17, 2026	501-1,000	500 contacts →
	Exact match “Natural Power is a leading independent consultancy and service provider for the renewable energy sector.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	Good Energy	Exact match	Chippenham, United KingdomHQ recorded Sep 17, 2026	201-500	456 contacts →
	Exact match “Good Energy has been driving the UK’s renewable energy revolution since helping homes and businesses become greener and more self-sufficient through clean power and green…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	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
8	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
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	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
11	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
12	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
13	Myenergi	Exact match	Stallingborough, United KingdomHQ recorded Sep 17, 2026	201-500	168 contacts →
	Exact match “We give you control of your generated green energy, creating the ultimate eco-smart home.” 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	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
18	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
19	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
20	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
21	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
22	Glow Green	Exact match	Bournemouth, United KingdomHQ recorded Sep 17, 2026	51-200	110 contacts →
	Exact match “Glow Green is one of the UK's leading installers of Solar Panels, Battery Storage, Heat Pumps, Boilers, AC Units, & EV Chargers.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23	Correct Contract Services CCS	Exact match	Andover, United KingdomHQ recorded Sep 17, 2026	201-500	108 contacts →
	Exact match “Correct Contract Services (CCS) is a trusted main contractor for compliance and energy services, expertly serving social housing landlords across the UK.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24	TSG UK	Exact match	Dundee, United KingdomHQ recorded Sep 17, 2026	201-500	105 contacts →
	Exact match “TSG UK is the leading UK provider of turnkey multi‑energy infrastructure solutions, supporting the transition from traditional fuels to EV charging, solar and new energies.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25	Eenergy	Exact match	London, United KingdomHQ recorded Sep 17, 2026	51-200	98 contacts →
	Exact match “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…” 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 equipment upgrade companies”. 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 2,451 renewable energy equipment upgrade companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 10,596 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Renewable energy equipment upgrade companies based in the United Kingdom at a glance

As of Sep 17, 2026

38.7%Verified-email coverage

11.2Average contacts per company

1-10Median size (employees)

9.4%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

1,274

11-50

905

51-200

203

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 2,451 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 equipment upgrade companies” 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 10,596 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 equipment upgrade companies 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 equipment upgrade companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many renewable energy equipment upgrade companies are there based in the United Kingdom?

RevenueBase identified 2,451 company matches for renewable energy equipment upgrade companies 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 equipment upgrade companies?

London leads with 230 company records, followed by Glasgow (45) and Manchester (41).

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 10,596 professional contacts with verified work emails tracked across these 2,451 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.

Ready to reach these companies? Verified emails and direct dials for all 2,451 renewable energy equipment upgrade companies based in the United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

Renewable energy equipment upgrade companies by geography

Browse the directory

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.