Company lists · Data refreshed September 2026

Top 25 Renewable energy integration consultants based in London, United Kingdom

Name: Renewable energy integration consultants 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 293 companies tracked

RevenueBase identified 293 renewable energy integration consultants headquartered in London, United Kingdom as of September 2026 and tracks 8,553 professional contacts across them, including 3,193 with verified work emails. London is the largest hub.

This list covers renewable energy integration consultants 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

293Companies

8,553Contacts tracked

3,193Verified emails

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The 25 largest renewable energy integration consultants based in London, United Kingdom

Ranked by team size

Top 25 of 293 renewable energy integration consultants 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 renewable energy integration consultants: 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	Octopus Energy	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	3,989 contacts →
	Partial 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 17, 2026
2	Penspen	Partial evidence	London, United KingdomHQ checked Sep 17, 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 17, 2026
3	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
4	OWC	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	185 contacts →
	Strong evidence “The Renewable Energy Consultants.” Source: RevenueBase Database · checked Sep 17, 2026
5	Brook Green Supply	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	201-500	183 contacts →
	Partial evidence “As a trusted end-to-end partner in the energy space, Brook Green Supply delivers the insight and expertise our customers need to make informed decisions, transact energy with…” Source: RevenueBase Database · checked Sep 17, 2026
6	Wood Thilsted	Strong evidence	London, United KingdomHQ checked Sep 17, 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 17, 2026
7	CFP Energy	Partial evidence	London, United KingdomHQ checked Sep 17, 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 17, 2026
8	JD Ross Energy	Strong evidence	London, United KingdomHQ checked Sep 17, 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 17, 2026
9	Longevity Partners	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	115 contacts →
	Strong evidence “Longevity Partners is a multidisciplinary energy and sustainability consultancy.” Source: RevenueBase Database · checked Sep 17, 2026
10	ADD Energy	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	201-500	107 contacts →
	Partial evidence “Add Energy's divisions have split and merged into two separate ABL Group companies.” Source: RevenueBase Database · checked Sep 17, 2026
11	Alfa Energy An Edison Energy Company	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	201-500	88 contacts →
	Strong 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 17, 2026
12	Innova	Strong evidence	London, United KingdomHQ checked Sep 17, 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 17, 2026
13	Reactive Technologies Limited	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	66 contacts →
	Partial evidence “Reactive Technologies (RTL) is a global Grid-Enhancing Technologies (GETs) company addressing the challenges of energy transition, electrification and accelerating load growth.” Source: RevenueBase Database · checked Sep 17, 2026
14	Advantage Utilities LTD	Partial evidence	London, United KingdomHQ checked Sep 17, 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 17, 2026
15	Engage Consulting	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	48 contacts →
	Partial evidence “Energy Industry Experts We are subject matter experts in the energy sector.” Source: RevenueBase Database · checked Sep 17, 2026
16	AVA Energy	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	47 contacts →
	Partial evidence “AVA Energy – Powering Energy Talent.” Source: RevenueBase Database · checked Sep 17, 2026
17	GAS Strategies	Indirect evidence	London, United KingdomHQ checked Sep 17, 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 17, 2026
18	Augusta & CO	Strong evidence	London, United KingdomHQ checked Sep 17, 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 17, 2026
19	Amberside Advisors	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	44 contacts →
	Strong 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 17, 2026
20	Natpower UK	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	38 contacts →
	Strong evidence “NatPower UK has the largest clean energy development programme in the UK, aiming at integrating large scale smart clean energy generation and distribution with large scale…” Source: RevenueBase Database · checked Sep 17, 2026
21	Syzygy	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	35 contacts →
	Partial evidence “Founded in 2010, Syzygy is the leading specialist low carbon technology consultancy for the real estate sector.” Source: RevenueBase Database · checked Sep 17, 2026
22	Envision	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	34 contacts →
	Strong 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 17, 2026
23	Enlist Solution	Indirect evidence	London, United KingdomHQ checked Sep 17, 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 17, 2026
24	Etasca	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	27 contacts →
	Partial evidence “The energy transition is gaining momentum but needs to accelerate to meet the challenges posed by the climate emergency.” Source: RevenueBase Database · checked Sep 17, 2026
25	Nexwell Power	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	27 contacts →
	Indirect evidence “Part of the Nexwell Group” 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: renewable energy integration consultants. 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 integration consultants.
Partial evidence: Its own public description names part of renewable energy integration consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name renewable energy integration consultants. 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 293 renewable energy integration consultants based in London, United Kingdom

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Renewable energy integration consultants based in London, United Kingdom at a glance

As of Sep 17, 2026

37.3%Verified-email coverage

29.2Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

177

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 293 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 integration consultants, 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 integration consultants”. 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 integration consultants), 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 integration consultants, 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, 3,193 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.

Renewable energy integration consultants by metro in the United Kingdom

Renewable energy integration consultants in London293
Renewable energy integration consultants in Glasgow39
Renewable energy integration consultants in Manchester35
Renewable energy integration consultants in Bristol30

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 integration consultants, 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 integration consultants are there based in London, United Kingdom?

RevenueBase identified 293 renewable energy integration consultants 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?

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

Which city has the most renewable energy integration consultants?

London leads with 293 headquartered companies, followed by Glasgow (39) and Manchester (35).

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 3,193 verified decision-maker contacts tracked across these 293 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.

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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.