Company lists · Data refreshed September 2026

Top 25 Off-grid energy system providers based in the United Kingdom

Name: Off-grid energy system providers 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 882 companies tracked

RevenueBase identified 882 off-grid energy system providers headquartered in the United Kingdom as of September 2026 and tracks 7,231 professional contacts across them, including 2,797 with verified work emails. London is the largest hub.

This list covers off-grid energy system providers 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 17, 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 17, 2026 86% judged on-target in blind review

882Companies

7,231Contacts tracked

2,797Verified emails

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The 25 largest off-grid energy system providers based in the United Kingdom

Ranked by team size

Top 25 of 882 off-grid energy system providers based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to off-grid energy system providers: 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	Good Energy	Partial evidence	Chippenham, United KingdomHQ checked Sep 17, 2026	201-500	456 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 17, 2026
2	Reon Energy Limited	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	201-500	402 contacts →
	Partial evidence “Reon Energy is a leading Cleantech company deploying Intelligent Renewable Energy Microgrids across South Asia, GCC & African region.” Source: RevenueBase Database · checked Sep 17, 2026
3	Ethical Power	Indirect evidence	Exeter, United KingdomHQ checked Sep 17, 2026	51-200	231 contacts →
	Indirect evidence “Ethical Power Group launched in the UK in 2010.” Source: RevenueBase Database · checked Sep 17, 2026
4	Myenergi	Partial evidence	Stallingborough, United KingdomHQ checked Sep 17, 2026	201-500	168 contacts →
	Partial evidence “We give you control of your generated green energy, creating the ultimate eco-smart home.” Source: RevenueBase Database · checked Sep 17, 2026
5	Powerstar	Indirect evidence	Sheffield, United KingdomHQ checked Sep 17, 2026	51-200	135 contacts →
	Indirect evidence “A D2Zero Company With a 24-year track record, Powerstar is an industry leader in electrification, specialising in designing and manufacturing cutting-edge power management tech…” Source: RevenueBase Database · checked Sep 17, 2026
6	BOXT	Indirect evidence	Leeds, United KingdomHQ checked Sep 17, 2026	51-200	116 contacts →
	Indirect evidence “We started out as a trailblazing boiler installation company in 2017 – the first to offer everything effortlessly online.” Source: RevenueBase Database · checked Sep 17, 2026
7	AES	Partial evidence	Enfield, United KingdomHQ checked Sep 17, 2026	201-500	112 contacts →
	Partial 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 17, 2026
8	Givenergy	Indirect evidence	Newcastle Under Lyme, United KingdomHQ checked Sep 17, 2026	51-200	101 contacts →
	Indirect evidence “GivEnergy – No.” Source: RevenueBase Database · checked Sep 17, 2026
9	Cleaner Group	Partial evidence	Wakefield, United KingdomHQ checked Sep 17, 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 17, 2026
10	Evergen Solar	Indirect evidence	Maidenhead, United KingdomHQ checked Sep 17, 2026	51-200	79 contacts →
	Indirect evidence “Fully funded solar solutions specialising in Commercial and Residential Solar with Battery.” Source: RevenueBase Database · checked Sep 17, 2026
11	Plug ME In	Partial evidence	Manchester, United KingdomHQ checked Sep 17, 2026	11-50	76 contacts →
	Partial evidence “Powering ahead the UK's clean energy transition.” Source: RevenueBase Database · checked Sep 17, 2026
12	Solaraid	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	72 contacts →
	Partial evidence “Established in 2006, SolarAid is the world’s first and leading non-profit organisation specialising in providing access to safe, reliable solar energy solutions to communities…” Source: RevenueBase Database · checked Sep 17, 2026
13	Wattstor	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	70 contacts →
	Partial evidence “Think Outside The Grid.” Source: RevenueBase Database · checked Sep 17, 2026
14	UK Greentech	Indirect evidence	Trafford Park, United KingdomHQ checked Sep 17, 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 17, 2026
15	Ecolution Group	Partial evidence	Trottiscliffe, United KingdomHQ checked Sep 17, 2026	51-200	55 contacts →
	Partial 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 17, 2026
16	Evoenergy	Partial evidence	Nottingham, United KingdomHQ checked Sep 17, 2026	11-50	54 contacts →
	Partial 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 17, 2026
17	Alt-Group	Strong evidence	Worcester, United KingdomHQ checked Sep 17, 2026	51-200	51 contacts →
	Strong 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 17, 2026
18	Prolectric Services	Strong evidence	Clevedon, United KingdomHQ checked Sep 17, 2026	51-200	51 contacts →
	Strong evidence “We help organisations replace diesel, cut carbon and reduce operating costs with advanced off-grid solar lighting, hybrid power and battery storage solutions.” Source: RevenueBase Database · checked Sep 17, 2026
19	ECO Providers	Partial evidence	Clitheroe, United KingdomHQ checked Sep 17, 2026	51-200	51 contacts →
	Partial evidence “ECO Providers is a trusted leader in renewable and energy efficiency solutions, helping homeowners, businesses, and social housing organisations reduce energy costs, improve…” Source: RevenueBase Database · checked Sep 17, 2026
20	Ylem Energy	Strong evidence	Manchester, United KingdomHQ checked Sep 17, 2026	51-200	51 contacts →
	Strong evidence “YLEM Energy is a leading independent power generation specialist with more than three decades’ experience in building, owning and operating smart generation systems.” Source: RevenueBase Database · checked Sep 17, 2026
21	SNRG	Indirect evidence	Berkhamsted, United KingdomHQ checked Sep 17, 2026	11-50	50 contacts →
	Indirect evidence “We design, fund, build and operate the next generation all-electric solution.” Source: RevenueBase Database · checked Sep 17, 2026
22	Think Hire	Strong evidence	Chadderton, United KingdomHQ checked Sep 17, 2026	51-200	49 contacts →
	Strong evidence “Think Hire, a division of Think Energy Group, is the UK’s premier off-grid Energy-as-a-Service provider.” Source: RevenueBase Database · checked Sep 17, 2026
23	Renenergy UK	Indirect evidence	Norwich, United KingdomHQ checked Sep 17, 2026	51-200	48 contacts →
	Indirect evidence “Electrifying change for businesses.” Source: RevenueBase Database · checked Sep 17, 2026
24	Effective Home	Partial evidence	Doncaster, United KingdomHQ checked Sep 17, 2026	51-200	48 contacts →
	Partial evidence “Effective Home was established in 2016 to help homeowners make their homes more energy efficient, save money and reduce their carbon footprint.” Source: RevenueBase Database · checked Sep 17, 2026
25	ARC Power	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	48 contacts →
	Partial evidence “ARC Power is at the forefront of renewable energy innovation in Africa, dedicated to transforming lives through energy access in underserved regions.” Source: RevenueBase Database · checked Sep 17, 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: off-grid energy system providers. 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 off-grid energy system providers.
Partial evidence: Its own public description names part of off-grid energy system providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name off-grid energy system providers. 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 882 off-grid energy system providers based in the United Kingdom

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Off-grid energy system providers based in the United Kingdom at a glance

As of Sep 17, 2026

38.7%Verified-email coverage

8.2Average contacts per company

1-10Median size (employees)

11.8%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

486

11-50

299

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 882 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 off-grid energy system providers, 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 “off-grid energy system providers”. 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 off-grid energy system providers), 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 off-grid energy system providers, 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, 2,797 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 17, 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.

Off-grid energy system providers by metro

Off-grid energy system providers in London104

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 off-grid energy system providers, 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 off-grid energy system providers are there based in the United Kingdom?

RevenueBase identified 882 off-grid energy system providers 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?

Good Energy, headquartered in Chippenham, tops this list with the largest team on record.

Which city has the most off-grid energy system providers?

London leads with 104 headquartered companies, followed by Manchester (16) and Sheffield (16).

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 2,797 verified decision-maker contacts tracked across these 882 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 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 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.