Company lists · Data refreshed September 2026

Top 25 Renewable energy consulting services based in London, United Kingdom

Name: Renewable energy consulting services based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 428 companies tracked

RevenueBase identified 428 renewable energy consulting services headquartered in London, United Kingdom as of September 2026 and tracks 5,486 professional contacts across them, including 2,156 with verified work emails. London is the largest hub.

This list covers renewable energy consulting services 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 21, 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 21, 2026 86% judged on-target in blind review

428Companies

5,486Contacts tracked

2,156Verified emails

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The 25 largest renewable energy consulting services based in London, United Kingdom

Ranked by team size

Top 25 of 428 renewable energy consulting services based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to renewable energy consulting services: 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	Penspen	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	1,001-5,000	1,007 contacts →
	Partial evidence “Penspen designs, maintains, and optimises energy infrastructure to improve access to secure and sustainable energy for communities worldwide.” Source: RevenueBase Database · checked Sep 21, 2026
2	Genesis	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	501-1,000	401 contacts →
	Partial evidence “Genesis is a market-leading advisory company focused on providing high-value technical and advisory services for the energy industry.” Source: RevenueBase Database · checked Sep 21, 2026
3	Intec Energy Solutions	Partial evidence	London, United KingdomHQ checked Sep 21, 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 21, 2026
4	OWC	Strong evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	185 contacts →
	Strong evidence “The Renewable Energy Consultants.” Source: RevenueBase Database · checked Sep 21, 2026
5	Wood Thilsted	Strong evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	175 contacts →
	Strong evidence “Wood Thilsted is a world-leading renewable energy engineering consultancy experienced and specialised in offshore wind.” Source: RevenueBase Database · checked Sep 21, 2026
6	CFP Energy	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	201-500	171 contacts →
	Partial evidence “CFP Energy is a leading provider of energy and environmental solutions for industrial and commercial clients.” Source: RevenueBase Database · checked Sep 21, 2026
7	Octopus Energy Generation	Partial evidence	London, United KingdomHQ checked Sep 21, 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 21, 2026
8	JD Ross Energy	Strong evidence	London, United KingdomHQ checked Sep 21, 2026	201-500	143 contacts →
	Strong evidence “JD Ross Energy is an international talent consultancy that solely focuses on the Renewable Energy sector, connecting the best talent across the globe with companies that are…” Source: RevenueBase Database · checked Sep 21, 2026
9	ZTP	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	115 contacts →
	Indirect evidence “At ZTP, we’re committed to accelerating the transition to a more sustainable future by reducing the negative impact of human activity on our planet - ecologically, financially…” Source: RevenueBase Database · checked Sep 21, 2026
10	Longevity Partners	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	115 contacts →
	Partial evidence “Longevity Partners is a multidisciplinary energy and sustainability consultancy.” Source: RevenueBase Database · checked Sep 21, 2026
11	Sustainable Advantage	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	89 contacts →
	Indirect evidence “Sustainable Advantage partners with Private Equity funds and businesses across the UK, France, and wider Europe.” Source: RevenueBase Database · checked Sep 21, 2026
12	Alfa Energy An Edison Energy Company	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	201-500	88 contacts →
	Partial evidence “Alfa Energy Group (an Edison Energy company) is an international energy, sustainability and technology consultant partner with 200 employees over four international locations.” Source: RevenueBase Database · checked Sep 21, 2026
13	Innova	Strong evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	77 contacts →
	Strong evidence “Innova is a forward-thinking renewable energy business, employing people across two offices in London and Cheltenham.” Source: RevenueBase Database · checked Sep 21, 2026
14	Elements Green	Strong evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	51 contacts →
	Strong evidence “Elements Green (EG) is a leading renewable energy developer headquartered in London, specialising in utility-scale solar PV systems and battery energy storage solutions.” Source: RevenueBase Database · checked Sep 21, 2026
15	Advantage Utilities LTD	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	50 contacts →
	Partial evidence “Advantage Utilities mission is to provide customers with a “One-Stop-Shop” for all their energy needs – with Market Leading Data/Expertise and Unrivalled “Drop Everything”…” Source: RevenueBase Database · checked Sep 21, 2026
16	Engage Consulting	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	48 contacts →
	Partial evidence “Energy Industry Experts We are subject matter experts in the energy sector.” Source: RevenueBase Database · checked Sep 21, 2026
17	ARC Power	Strong evidence	London, United KingdomHQ checked Sep 21, 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 21, 2026
18	AVA Energy	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	47 contacts →
	Partial evidence “AVA Energy – Powering Energy Talent.” Source: RevenueBase Database · checked Sep 21, 2026
19	Clarksons Offshore & Renewables	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	1,001-5,000	45 contacts →
	Indirect evidence “Part of the Clarksons Group, the world’s leading provider of integrated shipping services.” Source: RevenueBase Database · checked Sep 21, 2026
20	GAS Strategies	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	45 contacts →
	Indirect evidence “In a world where speed is a competitive advantage, Gas Strategies accelerates your route to readiness.” Source: RevenueBase Database · checked Sep 21, 2026
21	Augusta & CO	Strong evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	44 contacts →
	Strong evidence “Augusta is a London-based specialist financial advisory firm serving the renewables and energy transition sector.” Source: RevenueBase Database · checked Sep 21, 2026
22	Amberside Advisors	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	44 contacts →
	Partial evidence “Amberside Advisors is an independent consultancy providing financial and commercial advice to low carbon energy, infrastructure and public sector projects.” Source: RevenueBase Database · checked Sep 21, 2026
23	Syzygy	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	35 contacts →
	Indirect evidence “Founded in 2010, Syzygy is the leading specialist low carbon technology consultancy for the real estate sector.” Source: RevenueBase Database · checked Sep 21, 2026
24	Envision	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	34 contacts →
	Partial evidence “Envision is a specialist sustainability, energy and net zero design consultancy offering strategic and technical advice within the built environment and to businesses wishing to…” Source: RevenueBase Database · checked Sep 21, 2026
25	Enlist Solution	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	31 contacts →
	Indirect evidence “We are an International Solution Provider with Offices in the United Kingdom and Europe.” Source: RevenueBase Database · checked Sep 21, 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 consulting services. 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 consulting services.
Partial evidence: Its own public description names part of renewable energy consulting services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name renewable energy consulting services. 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 428 renewable energy consulting services based in London, United Kingdom

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Renewable energy consulting services based in London, United Kingdom at a glance

As of Sep 21, 2026

39.3%Verified-email coverage

12.8Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

281

11-50

109

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 428 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 consulting services, 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 “renewable energy consulting services”. 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 consulting services), 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 consulting services, 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, 2,156 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 21, 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 consulting services by metro in the United Kingdom

Renewable energy consulting services in London428
Renewable energy consulting services in Manchester46
Renewable energy consulting services in Glasgow41
Renewable energy consulting services in Bristol35
Renewable energy consulting services in Edinburgh33
Renewable energy consulting services in Aberdeen28

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 consulting services, 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 consulting services are there based in London, United Kingdom?

RevenueBase identified 428 renewable energy consulting services 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?

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

Which city has the most renewable energy consulting services?

London leads with 428 headquartered companies, followed by Manchester (46) and Glasgow (41).

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 2,156 verified decision-maker contacts tracked across these 428 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 21, 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.