Company lists · Data refreshed September 2026

Top 25 Renewable energy nonprofits based in the United Kingdom

Name: Renewable energy nonprofits 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 272 companies tracked

RevenueBase identified 272 renewable energy nonprofits headquartered in the United Kingdom as of September 2026 and tracks 4,421 professional contacts across them, including 1,865 with verified work emails. London is the largest hub.

This list covers renewable energy nonprofits 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

272Companies

4,421Contacts tracked

1,865Verified emails

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The 25 largest renewable energy nonprofits based in the United Kingdom

Ranked by team size

Top 25 of 272 renewable energy nonprofits 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 renewable energy nonprofits: 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	Lightsource BP	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	1,114 contacts →
	Strong evidence “Lightsource bp is working to support a future powered by renewable, affordable and reliable energy that benefits our partners, people and planet.” Source: RevenueBase Database · checked Sep 17, 2026
2	Energy Saving Trust	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	201-500	426 contacts →
	Partial evidence “Energy Saving Trust is an independent organisation dedicated to promoting energy efficiency, low carbon transport and sustainable energy use.” Source: RevenueBase Database · checked Sep 17, 2026
3	Ambipar Europe	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	10001+	335 contacts →
	Indirect evidence “At Ambipar, we are all caretakers of the planet!” Source: RevenueBase Database · checked Sep 17, 2026
4	LOW Carbon	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	195 contacts →
	Strong evidence “Low Carbon creates renewable energy to fight climate change.” Source: RevenueBase Database · checked Sep 17, 2026
5	Octopus Energy Generation	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	201-500	153 contacts →
	Partial evidence “At Octopus Energy Generation, we’re building green power for the future, from large-scale solar to onshore and offshore wind, and innovative initiatives like the Fan Club.” Source: RevenueBase Database · checked Sep 17, 2026
6	British Solar Renewables	Partial evidence	Shepton Mallet, United KingdomHQ checked Sep 17, 2026	51-200	148 contacts →
	Partial evidence “Clean energy, powered with purpose.” Source: RevenueBase Database · checked Sep 17, 2026
7	Centre For Sustainable Energy	Partial evidence	Bristol, United KingdomHQ checked Sep 17, 2026	51-200	108 contacts →
	Partial evidence “We are a national charity that shares our knowledge and experience to help people change the way they think and act on energy.” Source: RevenueBase Database · checked Sep 17, 2026
8	Tomato Energy	Partial evidence	Basingstoke, United KingdomHQ checked Sep 17, 2026	11-50	69 contacts →
	Partial evidence “We are Tomato Energy, and our mission is to empower UK communities to live sustainably, maximising green energy and keeping costs low.” Source: RevenueBase Database · checked Sep 17, 2026
9	Pacific Green	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	63 contacts →
	Partial evidence “Pacific Green is becoming a world leader at providing sustainable cleantech solutions to help solve climate warming, green energy and resource scarcity challenges.” Source: RevenueBase Database · checked Sep 17, 2026
10	Ecolution Group	Strong evidence	Trottiscliffe, United KingdomHQ checked Sep 17, 2026	51-200	55 contacts →
	Strong 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
11	Severn WYE	Partial evidence	Gloucester, United KingdomHQ checked Sep 17, 2026	51-200	54 contacts →
	Partial evidence “Severn Wye changes the way people, businesses and communities use energy, to meet the urgent need for warm, healthy homes now, and to create a low-carbon future driven by clean…” Source: RevenueBase Database · checked Sep 17, 2026
12	GSL	Strong evidence	Wigan, United KingdomHQ checked Sep 17, 2026	51-200	51 contacts →
	Strong evidence “At Grant Store Ltd (GSL), we specialise in delivering bespoke renewable energy solutions nationwide.” Source: RevenueBase Database · checked Sep 17, 2026
13	ARC Power	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	48 contacts →
	Strong 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
14	Renewable World	Partial evidence	Brighton, United KingdomHQ checked Sep 17, 2026	11-50	43 contacts →
	Partial evidence “Renewable World, a registered international non-profit organisation, works in East Africa, South Asia and Central America to tackle poverty through the provision of affordable…” Source: RevenueBase Database · checked Sep 17, 2026
15	Solar Options For Schools LTD	Partial evidence	Castle Hedingham, United KingdomHQ checked Sep 17, 2026	11-50	39 contacts →
	Partial evidence “We help schools decarbonise with solar energy.” Source: RevenueBase Database · checked Sep 17, 2026
16	Community Energy Scotland	Partial evidence	Inverness, United KingdomHQ checked Sep 17, 2026	11-50	37 contacts →
	Partial evidence “At Community Energy Scotland we work with community groups, supporting, promoting and representing the community energy sector by providing technical assistance, knowledge sharing…” Source: RevenueBase Database · checked Sep 17, 2026
17	Olympus Power LTD	Partial evidence	Exeter, United KingdomHQ checked Sep 17, 2026	11-50	31 contacts →
	Partial evidence “Zero Carbon Together means we're helping you own your energy.” Source: RevenueBase Database · checked Sep 17, 2026
18	Eden Sustainable LTD	Partial evidence	City Of London, United KingdomHQ checked Sep 17, 2026	11-50	30 contacts →
	Partial evidence “Eden Sustainable helps UK organisations cut energy costs, reduce carbon and future-proof their operations through intelligently designed commercial solar and energy infrastructure.” Source: RevenueBase Database · checked Sep 17, 2026
19	Repowering London	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	30 contacts →
	Strong evidence “Repowering develops renewable energy projects to build resilient, skilled communities and lead London to a low-carbon future.” Source: RevenueBase Database · checked Sep 17, 2026
20	Thrive Renewables	Strong evidence	Bristol, United KingdomHQ checked Sep 17, 2026	1-10	29 contacts →
	Strong evidence “Sign up to receive the latest news and expert insight into renewable energy.” Source: RevenueBase Database · checked Sep 17, 2026
21	The MCS Foundation	Indirect evidence	Cheshire, United KingdomHQ checked Sep 17, 2026	1-10	27 contacts →
	Indirect evidence “Our vision is to make every UK home carbon-free.” Source: RevenueBase Database · checked Sep 17, 2026
22	Nexwell Power	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	27 contacts →
	Indirect evidence “Part of the Nexwell Group” Source: RevenueBase Database · checked Sep 17, 2026
23	Ortus Energy	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	25 contacts →
	Strong 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 17, 2026
24	Carbon Limiting Technologies	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	24 contacts →
	Indirect evidence “At CLT, we believe clean technology is essential to building a resilient, competitive, and sustainable economy.” Source: RevenueBase Database · checked Sep 17, 2026
25	Green Energy International Limited	Strong evidence	Cheadle Hulme, United KingdomHQ checked Sep 17, 2026	11-50	24 contacts →
	Strong evidence “Green Energy International Limited (GEIL) operates in the renewable energy market specialising in solar energy development.” 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: renewable energy nonprofits. 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 renewable energy nonprofits.
Partial evidence: Its own public description names part of renewable energy nonprofits, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name renewable energy nonprofits. 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 272 renewable energy nonprofits based in the United Kingdom

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Renewable energy nonprofits based in the United Kingdom at a glance

As of Sep 17, 2026

42.2%Verified-email coverage

16.3Average contacts per company

1-10Median size (employees)

22.4%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

152

11-50

51-200

201-500

501-1,000

1,001-5,000

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 272 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 renewable energy nonprofits, 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 “renewable energy nonprofits”. 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 renewable energy nonprofits), 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 renewable energy nonprofits, 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, 1,865 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.

Renewable energy nonprofits by metro

Renewable energy nonprofits in London61

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 renewable energy nonprofits, 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 renewable energy nonprofits are there based in the United Kingdom?

RevenueBase identified 272 renewable energy nonprofits 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?

Lightsource BP, headquartered in London, tops this list with the largest team on record.

Which city has the most renewable energy nonprofits?

London leads with 61 headquartered companies, followed by Liverpool (7) and Bristol (6).

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 1,865 verified decision-maker contacts tracked across these 272 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.