Company lists · Data refreshed September 2026

Top 25 Distributed generation companies based in the United Kingdom

RevenueBase identified 1,766 distributed generation companies headquartered in the United Kingdom as of September 2026 and tracks 31,509 professional contacts across them, including 10,139 with verified work emails. London is the largest hub.

This list covers distributed generation 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 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
1,766Companies
31,509Contacts tracked
10,139Verified emails
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The 25 largest distributed generation companies based in the United Kingdom

Ranked by team size
Top 25 of 1,766 distributed generation companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to distributed generation 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceWindsor, United KingdomHQ checked Sep 16, 202610001+9,238 contacts →

Indirect evidence

“Taking care of things.”

Source: RevenueBase Database · checked Sep 16, 2026
2Indirect evidenceLondon, United KingdomHQ checked Sep 16, 20261,001-5,0003,989 contacts →

Indirect evidence

“We're on a mission to make a big green dent in the universe by building a truly sustainable energy system globally.”

Source: RevenueBase Database · checked Sep 16, 2026
3Indirect evidenceManchester, United KingdomHQ checked Sep 16, 20261,001-5,000692 contacts →

Indirect evidence

“We are Calisen.”

Source: RevenueBase Database · checked Sep 16, 2026
4Indirect evidenceLondon, United KingdomHQ checked Sep 16, 2026501-1,000563 contacts →

Indirect evidence

“Sonnedix is a global renewable energy company delivering 100% clean electricity directly to customers through a diversified portfolio of solar, wind, and storage assets.”

Source: RevenueBase Database · checked Sep 16, 2026
5Indirect evidenceGateshead, United KingdomHQ checked Sep 16, 2026501-1,000509 contacts →

Indirect evidence

“As leaders in our field, we’re trusted by over businesses to provide a full energy service.”

Source: RevenueBase Database · checked Sep 16, 2026
6Indirect evidenceLondon, United KingdomHQ checked Sep 16, 2026201-500402 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
7Indirect evidenceLondon, United KingdomHQ checked Sep 16, 2026201-500378 contacts →

Indirect evidence

“We do energy, you do you.”

Source: RevenueBase Database · checked Sep 16, 2026
8Indirect evidenceSolihull, United KingdomHQ checked Sep 16, 2026201-500293 contacts →

Indirect evidence

“Correla exists because we dream of a simpler, greener society powered by our investment in innovation and our passion for customers.”

Source: RevenueBase Database · checked Sep 16, 2026
9Indirect evidenceLondon, United KingdomHQ checked Sep 16, 2026501-1,000242 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 16, 2026
10Indirect evidenceExeter, United KingdomHQ checked Sep 16, 202651-200231 contacts →

Indirect evidence

“Ethical Power Group launched in the UK in 2010.”

Source: RevenueBase Database · checked Sep 16, 2026
11Partial evidenceAldershot, United KingdomHQ checked Sep 16, 2026201-500209 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 16, 2026
12Indirect evidenceStallingborough, United KingdomHQ checked Sep 16, 2026201-500168 contacts →

Indirect evidence

“We give you control of your generated green energy, creating the ultimate eco-smart home.”

Source: RevenueBase Database · checked Sep 16, 2026
13Indirect evidenceShepton Mallet, United KingdomHQ checked Sep 16, 202651-200148 contacts →

Indirect evidence

“Clean energy, powered with purpose.”

Source: RevenueBase Database · checked Sep 16, 2026
14Indirect evidenceSheffield, United KingdomHQ checked Sep 16, 202651-200135 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 16, 2026
15Partial evidenceEdinburgh, United KingdomHQ checked Sep 16, 202651-200132 contacts →

Partial evidence

“ENODA’s world-class team are building the first truly decentralized, intelligent energy system that will reshape how we generate, store, and distribute energy.”

Source: RevenueBase Database · checked Sep 16, 2026
16Indirect evidenceBristol, United KingdomHQ checked Sep 16, 202651-200126 contacts →

Indirect evidence

“Powered by People.”

Source: RevenueBase Database · checked Sep 16, 2026
17Indirect evidenceBurton On Trent, United KingdomHQ checked Sep 16, 2026201-500122 contacts →

Indirect evidence

“Project Solar UK Ltd are a well-established Renewable Energy company.”

Source: RevenueBase Database · checked Sep 16, 2026
18Indirect evidenceLeeds, United KingdomHQ checked Sep 16, 202651-200116 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 16, 2026
19Indirect evidenceEnfield, United KingdomHQ checked Sep 16, 2026201-500112 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 16, 2026
20Partial evidenceGlasgow, United KingdomHQ checked Sep 16, 202651-200111 contacts →

Partial evidence

“Smarter Grid Solutions is an enterprise energy software company with a unique end to end approach to Distributed Energy Resource Management Systems (DERMS) to deliver net zero…”

Source: RevenueBase Database · checked Sep 16, 2026
21Indirect evidenceBournemouth, United KingdomHQ checked Sep 16, 202651-200110 contacts →

Indirect 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 16, 2026
22Partial evidenceLondon, United KingdomHQ checked Sep 16, 202651-20098 contacts →

Partial evidence

“eEnergy (AIM: EAAS) is a UK-based Energy-as-a-Service (EaaS) provider, funding and delivering energy-saving and energy-generating solutions across multi-site public sector and…”

Source: RevenueBase Database · checked Sep 16, 2026
23Indirect evidenceBrinkworth, United KingdomHQ checked Sep 16, 202651-20095 contacts →

Indirect 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 16, 2026
24Indirect evidenceLondon, United KingdomHQ checked Sep 16, 2026201-50085 contacts →

Indirect evidence

“Who are we?”

Source: RevenueBase Database · checked Sep 16, 2026
25Indirect evidenceWakefield, United KingdomHQ checked Sep 16, 202611-5080 contacts →

Indirect 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 16, 2026

Showing 25 of 1,766 distributed generation companies based in the United Kingdom

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Distributed generation companies based in the United Kingdom at a glance

As of Sep 16, 2026
32.2%Verified-email coverage
17.8Average contacts per company
1-10Median size (employees)
12.3%Largest-city concentration · London
Sep 16, 2026Page data refreshed

Companies by employee count

1-10
908
11-50
663
51-200
137
201-500
17
501-1,000
7
1,001-5,000
9
5,001-10,000
1
10001+
3

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 1,766 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 distributed generation 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 “distributed generation 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 distributed generation 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 distributed generation 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, 10,139 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.

Distributed generation companies by metro

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 distributed generation 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 distributed generation companies are there based in the United Kingdom?

RevenueBase identified 1,766 distributed generation 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?

British GAS, headquartered in Windsor, tops this list with the largest team on record.

Which city has the most distributed generation companies?

London leads with 218 headquartered companies, followed by Manchester (33) and Nottingham (28).

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 10,139 verified decision-maker contacts tracked across these 1,766 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.