Company lists · Data refreshed September 2026

Top 25 Off grid solar system designers based in London, United Kingdom

Name: Off grid solar system designers based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 137 companies tracked

RevenueBase identified 137 off grid solar system designers headquartered in London, United Kingdom as of September 2026 and tracks 1,492 professional contacts across them, including 498 with verified work emails. London is the largest hub.

This list covers off grid solar system designers headquartered in London, 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

137Companies

1,492Contacts tracked

498Verified emails

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

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

Ranked by team size

Top 25 of 137 off grid solar system designers based in London, 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	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
4	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
5	Solarcentury Africa	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	201-500	32 contacts →
	Partial evidence “From pioneering solar company to international developer Founded in 1998, Solarcentury has been around since the early days of the solar industry.” Source: RevenueBase Database · checked Sep 17, 2026
6	Infinity Renewables Group	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	32 contacts →
	Partial evidence “Infinity is a leading full service residential and commercial solar provider.” Source: RevenueBase Database · checked Sep 17, 2026
7	Powervault	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	30 contacts →
	Indirect evidence “At Powervault, we are on a mission to pioneer a sustainable energy future.” Source: RevenueBase Database · checked Sep 17, 2026
8	PAS Solar	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	30 contacts →
	Strong evidence “PAS Solar is a leading Energy as a Service (EaaS) off-grid solar solution providers in Sub-Saharan Africa.” Source: RevenueBase Database · checked Sep 17, 2026
9	Ortus Energy	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	25 contacts →
	Indirect 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
10	Solivus	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	21 contacts →
	Partial evidence “Solivus are on a mission to decarbonise the built environment with lightweight solar, meaning businesses and homeowners can reduce their climate impact, increase energy security…” Source: RevenueBase Database · checked Sep 17, 2026
11	Excel Energy	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	19 contacts →
	Partial evidence “At Excel Energy, we are passionate about driving the adoption of commercial solar power in the business world.” Source: RevenueBase Database · checked Sep 17, 2026
12	Envirolec Smart Energy Solutions	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	17 contacts →
	Indirect evidence “With over 70 years combined industry experience, Envirolec Smart Energy Solutions has gained vital expertise and experience in a number of Renewable Technologies.” Source: RevenueBase Database · checked Sep 17, 2026
13	Sustain Certified B Corp	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	16 contacts →
	Partial evidence “Our mission is to help make our customers’ homes smarter, more efficient and cost less to run while helping the world get a cleaner energy system.” Source: RevenueBase Database · checked Sep 17, 2026
14	Greenenco LTD	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	15 contacts →
	Partial evidence “GreenEnco is a Technical Advisor and engineering solution provider to solar and energy storage projects.” Source: RevenueBase Database · checked Sep 17, 2026
15	Arin Power	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	11 contacts →
	Partial evidence “Helping the UK make the switch to a solar-powered future!” Source: RevenueBase Database · checked Sep 17, 2026
16	Upvolt	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	11 contacts →
	Strong evidence “Upvolt helps homeowners take control of their energy with smart solar, heating and home energy management systems.” Source: RevenueBase Database · checked Sep 17, 2026
17	Bluestone Energy Limited	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	10 contacts →
	Indirect evidence “At Bluestone Energy, we’re transforming the UK’s energy future one project at a time.” Source: RevenueBase Database · checked Sep 17, 2026
18	Novalux Energy	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	10 contacts →
	Partial evidence “Novalux Energy install and maintain solar PV and Energy from Waste (EfW) plants which provide heat and power to businesses on a smaller distributed scale.” Source: RevenueBase Database · checked Sep 17, 2026
19	Green Power Technologies GPT Renewables	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	9 contacts →
	Indirect evidence “At GPT Renewables, we’re powering the shift to cleaner, smarter energy-wherever it's needed most.” Source: RevenueBase Database · checked Sep 17, 2026
20	Soléco Energy	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	1-10	8 contacts →
	Partial evidence “Soleco Energy delivers turnkey solar and energy storage solutions for large commercial and industrial clients across the Caribbean and Latin America.” Source: RevenueBase Database · checked Sep 17, 2026
21	Iris Solar Technology	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	1-10	7 contacts →
	Strong evidence “Iris Solar is a clean tech startup building the world’s first all-in-one, monitorable off-grid solar system.” Source: RevenueBase Database · checked Sep 17, 2026
22	TWO Blues Solar	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	1-10	7 contacts →
	Partial evidence “Two Blues Solar was created to help businesses obtain the benefits of solar PV, where capital, complexity or other restrictions previously hindered them.” Source: RevenueBase Database · checked Sep 17, 2026
23	Freetricity Limited	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	1-10	7 contacts →
	Strong evidence “Freetricity has been installing and providing Solar PV systems since 2010.” Source: RevenueBase Database · checked Sep 17, 2026
24	Sustainergy	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	6 contacts →
	Partial evidence “We are a Tier 1 SOLAR PROCUREMENT PLATFORM trusted by EPCs, Wholesalers, Installers and Investors across the UK and Europe.” Source: RevenueBase Database · checked Sep 17, 2026
25	Nxgen Solar	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	6 contacts →
	Partial evidence “NXGEN Solar is a UK-based company that provides innovative, efficient and cost-effective solar power solutions to a wide range of customers from government level to industrial and…” 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 137 off grid solar system designers based in London, United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 498 reachable decision-makers.

Free signup · no credit card

View the full list →

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

As of Sep 17, 2026

33.4%Verified-email coverage

10.9Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 137 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 London, 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 London 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, 498 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 in the United Kingdom

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 London, United Kingdom?

RevenueBase identified 137 off grid solar system designers headquartered in London, 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 498 verified decision-maker contacts tracked across these 137 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 137 off grid solar system designers based in London, 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 · Off grid solar system designers in United Kingdom · 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.