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 company matches for renewable energy nonprofits associated with 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 company matches for renewable energy nonprofits 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

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 company matches for renewable energy nonprofits 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	Lightsource BP	Exact match	London, United KingdomHQ recorded Sep 17, 2026	1,001-5,000	1,114 contacts →
	Exact match “Lightsource bp is working to support a future powered by renewable, affordable and reliable energy that benefits our partners, people and planet.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2	Energy Saving Trust	Exact match	London, United KingdomHQ recorded Sep 17, 2026	201-500	426 contacts →
	Exact match “Energy Saving Trust is an independent organisation dedicated to promoting energy efficiency, low carbon transport and sustainable energy use.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3	Ambipar Europe	Exact match	London, United KingdomHQ recorded Sep 17, 2026	10001+	335 contacts →
	Exact match “At Ambipar, we are all caretakers of the planet!” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4	LOW Carbon	Exact match	London, United KingdomHQ recorded Sep 17, 2026	51-200	195 contacts →
	Exact match “Low Carbon creates renewable energy to fight climate change.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	Octopus Energy Generation	Exact match	London, United KingdomHQ recorded Sep 17, 2026	201-500	153 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	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
7	Centre For Sustainable Energy	Exact match	Bristol, United KingdomHQ recorded Sep 17, 2026	51-200	108 contacts →
	Exact match “We are a national charity that shares our knowledge and experience to help people change the way they think and act on energy.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	Tomato Energy	Exact match	Basingstoke, United KingdomHQ recorded Sep 17, 2026	11-50	69 contacts →
	Exact match “We are Tomato Energy, and our mission is to empower UK communities to live sustainably, maximising green energy and keeping costs low.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	Pacific Green	Exact match	London, United KingdomHQ recorded Sep 17, 2026	51-200	63 contacts →
	Exact match “Pacific Green is becoming a world leader at providing sustainable cleantech solutions to help solve climate warming, green energy and resource scarcity challenges.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	Ecolution Group	Exact match	Trottiscliffe, United KingdomHQ recorded Sep 17, 2026	51-200	55 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	Severn WYE	Exact match	Gloucester, United KingdomHQ recorded Sep 17, 2026	51-200	54 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	GSL	Exact match	Wigan, United KingdomHQ recorded Sep 17, 2026	51-200	51 contacts →
	Exact match “At Grant Store Ltd (GSL), we specialise in delivering bespoke renewable energy solutions nationwide.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	ARC Power	Exact match	London, United KingdomHQ recorded Sep 17, 2026	51-200	48 contacts →
	Exact match “ARC Power is at the forefront of renewable energy innovation in Africa, dedicated to transforming lives through energy access in underserved regions.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14	Renewable World	Exact match	Brighton, United KingdomHQ recorded Sep 17, 2026	11-50	43 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15	Solar Options For Schools LTD	Exact match	Castle Hedingham, United KingdomHQ recorded Sep 17, 2026	11-50	39 contacts →
	Exact match “We help schools decarbonise with solar energy.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	Community Energy Scotland	Exact match	Inverness, United KingdomHQ recorded Sep 17, 2026	11-50	37 contacts →
	Exact match “At Community Energy Scotland we work with community groups, supporting, promoting and representing the community energy sector by providing technical assistance, knowledge sharing…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17	Olympus Power LTD	Exact match	Exeter, United KingdomHQ recorded Sep 17, 2026	11-50	31 contacts →
	Exact match “Zero Carbon Together means we're helping you own your energy.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18	Eden Sustainable LTD	Exact match	City Of London, United KingdomHQ recorded Sep 17, 2026	11-50	30 contacts →
	Exact match “Eden Sustainable helps UK organisations cut energy costs, reduce carbon and future-proof their operations through intelligently designed commercial solar and energy infrastructure.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19	Repowering London	Exact match	London, United KingdomHQ recorded Sep 17, 2026	11-50	30 contacts →
	Exact match “Repowering develops renewable energy projects to build resilient, skilled communities and lead London to a low-carbon future.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20	Thrive Renewables	Exact match	Bristol, United KingdomHQ recorded Sep 17, 2026	1-10	29 contacts →
	Exact match “Sign up to receive the latest news and expert insight into renewable energy.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21	The MCS Foundation	Exact match	Cheshire, United KingdomHQ recorded Sep 17, 2026	1-10	27 contacts →
	Exact match “Our vision is to make every UK home carbon-free.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22	Nexwell Power	Exact match	London, United KingdomHQ recorded Sep 17, 2026	11-50	27 contacts →
	Exact match “Part of the Nexwell Group” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23	Ortus Energy	Exact match	London, United KingdomHQ recorded Sep 17, 2026	11-50	25 contacts →
	Exact match “Ortus Energy is powering up industry across the UK & Ireland by delivering on-site renewable energy on a commercial scale.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24	Carbon Limiting Technologies	Exact match	London, United KingdomHQ recorded Sep 17, 2026	11-50	24 contacts →
	Exact match “At CLT, we believe clean technology is essential to building a resilient, competitive, and sustainable economy.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25	Green Energy International Limited	Exact match	Cheadle Hulme, United KingdomHQ recorded Sep 17, 2026	11-50	24 contacts →
	Exact match “Green Energy International Limited (GEIL) operates in the renewable energy market specialising in solar energy development.” 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 nonprofits”. 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 272 renewable energy nonprofits based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 1,865 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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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

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 nonprofits” 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 1,865 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.

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 nonprofits”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many renewable energy nonprofits are there based in the United Kingdom?

RevenueBase identified 272 company matches for renewable energy nonprofits 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?

Lightsource BP tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most renewable energy nonprofits?

London leads with 61 company records, 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 limited free results with 500 credits to start. Upgrading provides access to the 1,865 professional contacts with verified work emails tracked across these 272 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.

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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 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.