Company lists · Data refreshed September 2026

Top 25 Solar contractors based in London, United Kingdom

Name: Solar 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 16, 2026 166 companies tracked

RevenueBase identified 166 solar contractors headquartered in London, United Kingdom as of September 2026 and tracks 1,520 professional contacts across them, including 430 with verified work emails. London is the largest hub.

This list covers solar 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 16, 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 16, 2026 86% judged on-target in blind review

166Companies

1,520Contacts tracked

430Verified emails

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The 25 largest solar contractors based in London, United Kingdom

Ranked by team size

Top 25 of 166 solar contractors based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to solar 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	Reon Energy Limited	Indirect evidence	London, United KingdomHQ checked Sep 16, 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 16, 2026
2	Wiseenergy	Partial evidence	London, United KingdomHQ checked Sep 16, 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 16, 2026
3	Sunel Group	Strong evidence	London, United KingdomHQ checked Sep 16, 2026	201-500	113 contacts →
	Strong evidence “SUNEL GROUP is a globally recognized EPC Contractor and Developer for Solar projects.” Source: RevenueBase Database · checked Sep 16, 2026
4	Purdy Part Of Sureserve	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	201-500	85 contacts →
	Indirect evidence “Who are we?” Source: RevenueBase Database · checked Sep 16, 2026
5	Sunsave	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	11-50	52 contacts →
	Partial evidence “We offer the UK's only solar subscription, Sunsave Plus, which removes the upfront cost of solar entirely.” Source: RevenueBase Database · checked Sep 16, 2026
6	ECS Systems LTD	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	11-50	35 contacts →
	Indirect evidence “Here at ECS Systems we pride ourselves on providing the highest level of personalised service, to every client.” Source: RevenueBase Database · checked Sep 16, 2026
7	Infinity Renewables Group	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	32 contacts →
	Partial evidence “Infinity is a leading full service residential and commercial solar provider.” Source: RevenueBase Database · checked Sep 16, 2026
8	Ortus Energy	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	11-50	25 contacts →
	Indirect evidence “Ortus Energy is powering up industry across the UK & Ireland by delivering on-site renewable energy on a commercial scale.” Source: RevenueBase Database · checked Sep 16, 2026
9	Solivus	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	11-50	21 contacts →
	Partial evidence “Solivus are on a mission to decarbonise the built environment with lightweight solar, meaning businesses and homeowners can reduce their climate impact, increase energy security…” Source: RevenueBase Database · checked Sep 16, 2026
10	Excel Energy	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	11-50	19 contacts →
	Partial evidence “At Excel Energy, we are passionate about driving the adoption of commercial solar power in the business world.” Source: RevenueBase Database · checked Sep 16, 2026
11	Envirolec Smart Energy Solutions	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	11-50	17 contacts →
	Indirect evidence “With over 70 years combined industry experience, Envirolec Smart Energy Solutions has gained vital expertise and experience in a number of Renewable Technologies.” Source: RevenueBase Database · checked Sep 16, 2026
12	Greenenco LTD	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	11-50	15 contacts →
	Partial evidence “GreenEnco is a Technical Advisor and engineering solution provider to solar and energy storage projects.” Source: RevenueBase Database · checked Sep 16, 2026
13	Solar On Steroids	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	1-10	14 contacts →
	Partial evidence “We put solar businesses on steroids with market leading video ads.” Source: RevenueBase Database · checked Sep 16, 2026
14	Arin Power	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	11-50	11 contacts →
	Partial evidence “Helping the UK make the switch to a solar-powered future!” Source: RevenueBase Database · checked Sep 16, 2026
15	Installio	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	11-50	11 contacts →
	Partial evidence “Installio is a clean energy delivery partner supporting solar, battery and heat pump upgrades across the UK.” Source: RevenueBase Database · checked Sep 16, 2026
16	Upvolt	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	11 contacts →
	Partial evidence “Upvolt helps homeowners take control of their energy with smart solar, heating and home energy management systems.” Source: RevenueBase Database · checked Sep 16, 2026
17	Soléco Energy	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	1-10	8 contacts →
	Partial evidence “Soleco Energy delivers turnkey solar and energy storage solutions for large commercial and industrial clients across the Caribbean and Latin America.” Source: RevenueBase Database · checked Sep 16, 2026
18	TWO Blues Solar	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	1-10	7 contacts →
	Partial evidence “Two Blues Solar was created to help businesses obtain the benefits of solar PV, where capital, complexity or other restrictions previously hindered them.” Source: RevenueBase Database · checked Sep 16, 2026
19	Freetricity Limited	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	1-10	7 contacts →
	Partial evidence “Freetricity has been installing and providing Solar PV systems since 2010.” Source: RevenueBase Database · checked Sep 16, 2026
20	Gryd Energy	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	1-10	6 contacts →
	Partial evidence “Gryd offers developers and homeowners a smarter way to power new-build homes by providing fully-funded solar and storage that exceeds regulations and expectations.” Source: RevenueBase Database · checked Sep 16, 2026
21	Nxgen Solar	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	11-50	6 contacts →
	Partial evidence “NXGEN Solar is a UK-based company that provides innovative, efficient and cost-effective solar power solutions to a wide range of customers from government level to industrial and…” Source: RevenueBase Database · checked Sep 16, 2026
22	Vezo Energy	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	11-50	5 contacts →
	Indirect evidence “Vezo Energy delivers professional electrical, construction and facilities services for offices, leisure facilities, hospitals, property managers, commercial properties and luxury…” Source: RevenueBase Database · checked Sep 16, 2026
23	Rapid Renewables	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	11-50	5 contacts →
	Partial evidence “Rapid Renewables is a leading stockist and trade distributor of renewable energy solutions for commercial and residential installations, including solar photovoltaic (PV) panels…” Source: RevenueBase Database · checked Sep 16, 2026
24	Praeter LTD	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	1-10	5 contacts →
	Partial evidence “Praeter is an independent consultancy firm specialising in the implementation of solar PV systems on rooftops and in car parks.” Source: RevenueBase Database · checked Sep 16, 2026
25	Solarel	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	1-10	4 contacts →
	Partial evidence “Solarel provides and finances solar and CHP installations for businesses in the UK.” Source: RevenueBase Database · checked Sep 16, 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 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 solar contractors.
Partial evidence: Its own public description names part of solar contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name solar 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 166 solar contractors based in London, United Kingdom

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Solar contractors based in London, United Kingdom at a glance

As of Sep 16, 2026

28.3%Verified-email coverage

9.2Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · London

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

103

11-50

51-200

201-500

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 166 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 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 “solar 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 solar 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 solar 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, 430 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 16, 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 contractors by metro in the United Kingdom

Solar contractors in London166
Solar contractors in Nottingham28
Solar contractors in Glasgow27
Solar contractors in Manchester26
Solar contractors in Bristol25

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 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 solar contractors are there based in London, United Kingdom?

RevenueBase identified 166 solar 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?

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

Which city has the most solar contractors?

London leads with 166 headquartered companies, followed by Nottingham (28) and Glasgow (27).

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 430 verified decision-maker contacts tracked across these 166 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 16, 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.