Company lists · Data refreshed September 2026

Top 25 Solar installation companies based in the United Kingdom

Name: Solar installation 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 18, 2026 1,606 companies tracked

RevenueBase identified 1,606 solar installation companies headquartered in the United Kingdom as of September 2026 and tracks 9,734 professional contacts across them, including 3,254 with verified work emails. London is the largest hub.

This list covers solar installation companies headquartered in the 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

1,606Companies

9,734Contacts tracked

3,254Verified emails

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The 25 largest solar installation companies based in the United Kingdom

Ranked by team size

Top 25 of 1,606 solar installation companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 18, 2026. RevenueBase Smart Search rates how each company's information relates to solar installation companies: 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	Reon Energy Limited	Indirect evidence	London, United KingdomHQ checked Sep 18, 2026	201-500	402 contacts →
	Indirect 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
2	Clarkson Evans LTD	Partial evidence	Gloucester, United KingdomHQ checked Sep 18, 2026	501-1,000	331 contacts →
	Partial evidence “With over 850 staff, we are one of the UK’s leading electrical contractors and solar PV installers.” Source: RevenueBase Database · checked Sep 18, 2026
3	Intec Energy Solutions	Indirect evidence	London, United KingdomHQ checked Sep 18, 2026	501-1,000	242 contacts →
	Indirect 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
4	SEGEN	Partial evidence	Aldershot, United KingdomHQ checked Sep 18, 2026	201-500	209 contacts →
	Partial evidence “Segen is the largest solar PV, energy storage system and EV charging solution distributor in the UK.” Source: RevenueBase Database · checked Sep 18, 2026
5	Wiseenergy	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	51-200	195 contacts →
	Partial evidence “WiseEnergy is a trusted solar asset manager, delivering a full range of market-leading services to our global clients.” Source: RevenueBase Database · checked Sep 18, 2026
6	Project Solar UK	Partial evidence	Burton On Trent, United KingdomHQ checked Sep 18, 2026	201-500	122 contacts →
	Partial evidence “Project Solar UK Ltd are a well-established Renewable Energy company.” Source: RevenueBase Database · checked Sep 18, 2026
7	BOXT	Partial evidence	Leeds, United KingdomHQ checked Sep 18, 2026	51-200	116 contacts →
	Partial evidence “We started out as a trailblazing boiler installation company in 2017 – the first to offer everything effortlessly online.” Source: RevenueBase Database · checked Sep 18, 2026
8	Sunel Group	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	201-500	113 contacts →
	Partial evidence “SUNEL GROUP is a globally recognized EPC Contractor and Developer for Solar projects.” Source: RevenueBase Database · checked Sep 18, 2026
9	AES	Indirect evidence	Enfield, United KingdomHQ checked Sep 18, 2026	201-500	112 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 18, 2026
10	Glow Green	Partial evidence	Bournemouth, United KingdomHQ checked Sep 18, 2026	51-200	110 contacts →
	Partial evidence “Glow Green is one of the UK's leading installers of Solar Panels, Battery Storage, Heat Pumps, Boilers, AC Units, & EV Chargers.” Source: RevenueBase Database · checked Sep 18, 2026
11	Belectric UK Member Of Elevion Group	Partial evidence	Brinkworth, United KingdomHQ checked Sep 18, 2026	51-200	95 contacts →
	Partial evidence “BELECTRIC UK is part of BELECTRIC, one of Europe's leading EPC service providers in the development, construction, and operation of solar power plants.” Source: RevenueBase Database · checked Sep 18, 2026
12	Cleaner Group	Partial evidence	Wakefield, United KingdomHQ checked Sep 18, 2026	11-50	80 contacts →
	Partial evidence “Cleaner Group is a UK leader in full turnkey renewable energy solutions; primarily for commercial EV charging and solar PV.” Source: RevenueBase Database · checked Sep 18, 2026
13	Evergen Solar	Partial evidence	Maidenhead, United KingdomHQ checked Sep 18, 2026	51-200	79 contacts →
	Partial evidence “Fully funded solar solutions specialising in Commercial and Residential Solar with Battery.” Source: RevenueBase Database · checked Sep 18, 2026
14	Innova	Indirect evidence	London, United KingdomHQ checked Sep 18, 2026	51-200	77 contacts →
	Indirect 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
15	Plug ME In	Indirect evidence	Manchester, United KingdomHQ checked Sep 18, 2026	11-50	76 contacts →
	Indirect evidence “Powering ahead the UK's clean energy transition.” Source: RevenueBase Database · checked Sep 18, 2026
16	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
17	Dulas LTD	Partial evidence	Machynlleth, United KingdomHQ checked Sep 18, 2026	51-200	64 contacts →
	Partial evidence “With over 35 years of experience in the clean energy sector, Dulas is an award-winning renewable energy installer and consultancy, specialising in the wind, solar and hydro…” Source: RevenueBase Database · checked Sep 18, 2026
18	UK Greentech	Indirect evidence	Trafford Park, United KingdomHQ checked Sep 18, 2026	51-200	61 contacts →
	Indirect evidence “UK Greentech, a division of Edmundson Electrical, is a distributor of quality branded renewables products with locations servicing the whole of the UK.” Source: RevenueBase Database · checked Sep 18, 2026
19	Ecolution Group	Indirect evidence	Trottiscliffe, United KingdomHQ checked Sep 18, 2026	51-200	55 contacts →
	Indirect evidence “Renewable Energy Experts: For over 25 years, Ecolution have been at the forefront of renewable energy services, using our award-winning expertise, to help our clients innovate and…” Source: RevenueBase Database · checked Sep 18, 2026
20	Evoenergy	Indirect evidence	Nottingham, United KingdomHQ checked Sep 18, 2026	11-50	54 contacts →
	Indirect evidence “Driving the market through innovation, EvoEnergy are the UK’s leading energy technology solutions provider, helping blue-chip clients and SME’s turn their sites into ‘sustainable…” Source: RevenueBase Database · checked Sep 18, 2026
21	Alt-Group	Partial evidence	Worcester, United KingdomHQ checked Sep 18, 2026	51-200	51 contacts →
	Partial evidence “Alt-Group is a forward-thinking, renewable energy company; advising on, installing and maintaining excellent renewable systems including Solar PV, EV Charging & Batteries.” Source: RevenueBase Database · checked Sep 18, 2026
22	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
23	Renenergy UK	Indirect evidence	Norwich, United KingdomHQ checked Sep 18, 2026	51-200	48 contacts →
	Indirect evidence “Electrifying change for businesses.” Source: RevenueBase Database · checked Sep 18, 2026
24	Brighter Green Engineering	Partial evidence	High Wycombe, United KingdomHQ checked Sep 18, 2026	51-200	43 contacts →
	Partial evidence “Brighter Green Engineering (BGE) is a specialist operations and maintenance provider for ground-mounted, utility-scale solar assets across the United Kingdom.” Source: RevenueBase Database · checked Sep 18, 2026
25	Carbon3	Indirect evidence	Wrotham Heath, United KingdomHQ checked Sep 18, 2026	51-200	43 contacts →
	Indirect evidence “Carbon3 helps local authorities, social housing providers, businesses, and developers cut carbon at scale.” 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: solar installation companies. 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 solar installation companies.
Partial evidence: Its own public description names part of solar installation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name solar installation companies. 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 1,606 solar installation companies based in the United Kingdom

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Solar installation companies based in the United Kingdom at a glance

As of Sep 18, 2026

33.4%Verified-email coverage

6.1Average contacts per company

1-10Median size (employees)

8.6%Largest-city concentration · London

Sep 18, 2026Page data refreshed

Companies by employee count

1-10

927

11-50

548

51-200

201-500

501-1,000

1,001-5,000

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 1,606 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 solar installation companies, 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 the United Kingdom whose own description of what they do matches “solar installation companies”. 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 solar installation companies), 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 solar installation companies, and records with no verified work email. Companies headquartered outside United Kingdom 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, 3,254 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.

Solar installation companies by metro

Solar installation companies in London138
Solar installation companies in Nottingham25

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 solar installation companies, 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 solar installation companies are there based in the United Kingdom?

RevenueBase identified 1,606 solar installation companies headquartered in the 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?

Reon Energy Limited, headquartered in London, tops this list with the largest team on record.

Which city has the most solar installation companies?

London leads with 138 headquartered companies, followed by Nottingham (25) and Glasgow (22).

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 3,254 verified decision-maker contacts tracked across these 1,606 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.