Company lists · Data refreshed September 2026

Top 25 Off grid solar system designers based in the United Kingdom

Name: Off grid solar system designers 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 1,564 companies tracked

RevenueBase identified 1,564 off grid solar system designers headquartered in the United Kingdom as of September 2026 and tracks 9,538 professional contacts across them, including 3,236 with verified work emails. London is the largest hub.

This list covers off grid solar system designers 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

1,564Companies

9,538Contacts tracked

3,236Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest off grid solar system designers based in the United Kingdom

Ranked by team size

Top 25 of 1,564 off grid solar system designers 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 solar system designers: 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 17, 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 17, 2026
2	Intec Energy Solutions	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	501-1,000	242 contacts →
	Partial 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 17, 2026
3	SEGEN	Strong evidence	Aldershot, United KingdomHQ checked Sep 17, 2026	201-500	209 contacts →
	Strong evidence “Segen is the largest solar PV, energy storage system and EV charging solution distributor in the UK.” Source: RevenueBase Database · checked Sep 17, 2026
4	Project Solar UK	Partial evidence	Burton On Trent, United KingdomHQ checked Sep 17, 2026	201-500	122 contacts →
	Partial evidence “Project Solar UK Ltd are a well-established Renewable Energy company.” Source: RevenueBase Database · checked Sep 17, 2026
5	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
6	Sunel Group	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	201-500	113 contacts →
	Partial evidence “SUNEL GROUP is a globally recognized EPC Contractor and Developer for Solar projects.” Source: RevenueBase Database · checked Sep 17, 2026
7	AES	Indirect evidence	Enfield, United KingdomHQ checked Sep 17, 2026	201-500	112 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 17, 2026
8	Glow Green	Partial evidence	Bournemouth, United KingdomHQ checked Sep 17, 2026	51-200	110 contacts →
	Partial 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 17, 2026
9	Belectric UK Member Of Elevion Group	Partial evidence	Brinkworth, United KingdomHQ checked Sep 17, 2026	51-200	95 contacts →
	Partial 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 17, 2026
10	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
11	Evergen Solar	Partial evidence	Maidenhead, United KingdomHQ checked Sep 17, 2026	51-200	79 contacts →
	Partial evidence “Fully funded solar solutions specialising in Commercial and Residential Solar with Battery.” Source: RevenueBase Database · checked Sep 17, 2026
12	Plug ME In	Indirect evidence	Manchester, United KingdomHQ checked Sep 17, 2026	11-50	76 contacts →
	Indirect evidence “Powering ahead the UK's clean energy transition.” 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	Dulas LTD	Partial evidence	Machynlleth, United KingdomHQ checked Sep 17, 2026	51-200	64 contacts →
	Partial evidence “With over 35 years of experience in the clean energy sector, Dulas is an award-winning renewable energy installer and consultancy, specialising in the wind, solar and hydro…” Source: RevenueBase Database · checked Sep 17, 2026
15	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
16	Ecolution Group	Indirect evidence	Trottiscliffe, United KingdomHQ checked Sep 17, 2026	51-200	55 contacts →
	Indirect 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
17	Evoenergy	Indirect evidence	Nottingham, United KingdomHQ checked Sep 17, 2026	11-50	54 contacts →
	Indirect 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
18	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
19	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
20	Ylem Energy	Partial evidence	Manchester, United KingdomHQ checked Sep 17, 2026	51-200	51 contacts →
	Partial 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	Carbon3	Indirect evidence	Wrotham Heath, United KingdomHQ checked Sep 17, 2026	51-200	43 contacts →
	Indirect evidence “Carbon3 helps local authorities, social housing providers, businesses, and developers cut carbon at scale.” Source: RevenueBase Database · checked Sep 17, 2026
25	NRT Group	Indirect evidence	Banstead, United KingdomHQ checked Sep 17, 2026	51-200	42 contacts →
	Indirect evidence “Our aim is to be the first choice for electrical and engineering installations.” 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 solar system designers. 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 solar system designers.
Partial evidence: Its own public description names part of off grid solar system designers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name off grid solar system designers. 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 1,564 off grid solar system designers based in the United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 3,236 reachable decision-makers.

Free signup · no credit card

View the full list →

Off grid solar system designers based in the United Kingdom at a glance

As of Sep 17, 2026

33.9%Verified-email coverage

6.1Average contacts per company

1-10Median size (employees)

8.8%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

894

11-50

544

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 1,564 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 solar system designers, 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 solar system designers”. 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 solar system designers), 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 solar system designers, 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, 3,236 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 solar system designers by metro

Off grid solar system designers in London137
Off grid solar system designers in Nottingham28
Off grid solar system designers in Manchester26

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 solar system designers, 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 solar system designers are there based in the United Kingdom?

RevenueBase identified 1,564 off grid solar system designers 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?

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

Which city has the most off grid solar system designers?

London leads with 137 headquartered companies, followed by Nottingham (28) and Manchester (26).

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 3,236 verified decision-maker contacts tracked across these 1,564 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.

Ready to reach these companies? Verified emails and direct dials for all 1,564 off grid solar system designers based in the United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

Off grid solar system designers by geography

Browse the directory

Browse: Companies home · All United Kingdom lists · All Off grid solar system designers lists · New lists

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.