Company lists · Data refreshed September 2026

Top 25 Power systems engineering companies based in London, United Kingdom

Name: Power systems engineering companies 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 187 companies tracked

RevenueBase identified 187 power systems engineering companies headquartered in London, United Kingdom as of September 2026 and tracks 2,663 professional contacts across them, including 906 with verified work emails. London is the largest hub.

This list covers power systems engineering companies 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

187Companies

2,663Contacts tracked

906Verified emails

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

The 25 largest power systems engineering companies based in London, United Kingdom

Ranked by team size

Top 25 of 187 power systems engineering companies 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 power systems engineering 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Penspen	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	1,007 contacts →
	Indirect 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
2	Intec Energy Solutions	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	501-1,000	242 contacts →
	Strong 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	AMD Group	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	82 contacts →
	Partial evidence “AMD Environmental are a collaborative Mechanical and Electrical Design and Build Engineering specialist with a sustainable approach in delivering challenging and bespoke projects…” Source: RevenueBase Database · checked Sep 17, 2026
4	Grant Walker Engineering	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	81 contacts →
	Strong evidence “Grant Walker Engineering specialise in the complete installation of Electrical and Mechanical systems across all work sectors including quality office developments, commercial and…” Source: RevenueBase Database · checked Sep 17, 2026
5	ETA Projects LTD	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	62 contacts →
	Partial evidence “Chosen to deliver, trusted to care - for 30 years we’ve worked with clients across a diverse range of sectors to deliver safe and sustainable engineering solutions that prioritise…” Source: RevenueBase Database · checked Sep 17, 2026
6	ECS Systems LTD	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	35 contacts →
	Partial evidence “Here at ECS Systems we pride ourselves on providing the highest level of personalised service, to every client.” Source: RevenueBase Database · checked Sep 17, 2026
7	Phoenix ME	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	501-1,000	33 contacts →
	Partial evidence “We stand as a well-established industry leader, specialising in the design, installation, and commissioning of mechanical and electrical systems across diverse sectors.” Source: RevenueBase Database · checked Sep 17, 2026
8	Navitas Engineering LTD	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	27 contacts →
	Partial evidence “Navitas Engineering provides electrical engineering consultancy services to the railway and electricity supply industries.” Source: RevenueBase Database · checked Sep 17, 2026
9	M.P.E. Power System Consultants	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	25 contacts →
	Indirect evidence “M.P.E.” Source: RevenueBase Database · checked Sep 17, 2026
10	Eltrade Electrical LTD	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	1-10	23 contacts →
	Partial evidence “ELTRADE ELECTRICAL LTD is a civil engineering company” Source: RevenueBase Database · checked Sep 17, 2026
11	UK Power Engineers LTD Ukpe	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	16 contacts →
	Strong evidence “UK Power Engineers (UKPE) is a professional services firm established in 2013, specializing in turnkey design, engineering, and consultancy solutions for the UK and international…” Source: RevenueBase Database · checked Sep 17, 2026
12	Power Transmission & Distribution	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	14 contacts →
	Partial evidence “PaE T&D is a Power Transmission and Distribution Design Consultancy” Source: RevenueBase Database · checked Sep 17, 2026
13	BTP Consultants	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	12 contacts →
	Partial evidence “We design mechanical and electrical systems, advise on all aspects of energy, carbon reduction and building physics.” Source: RevenueBase Database · checked Sep 17, 2026
14	Cole Group	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	12 contacts →
	Indirect evidence “At COLE Group, we specialize in delivering outstanding electrical solutions for both new build and refurbishment projects.” Source: RevenueBase Database · checked Sep 17, 2026
15	Concepto Solutions LTD	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	12 contacts →
	Indirect evidence “Concepto AV is an electrical-led technology company delivering high-quality electrical installations across residential and commercial projects in London.” Source: RevenueBase Database · checked Sep 17, 2026
16	SPL Construct LTD	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	12 contacts →
	Indirect evidence “As fully qualified, time served electrical contractors, we have a wealth of knowledge in the electrical industry, predominantly carrying out a wide range of services from design…” Source: RevenueBase Database · checked Sep 17, 2026
17	Zeus Electrical Constructions	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	11 contacts →
	Indirect evidence “ZEUS is engaged in studies and electrical installations.” Source: RevenueBase Database · checked Sep 17, 2026
18	Utility Results LTD	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	10 contacts →
	Indirect evidence “Utility Infrastructure Planning, Utility Project Management, Utility Design & Utility & Energy Procurement Specialists” Source: RevenueBase Database · checked Sep 17, 2026
19	Faircloth Construction Limited	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	9 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
20	Rail Power Solutions	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	1-10	9 contacts →
	Partial evidence “Established in 2013, Rail Power Solutions (RPS) has grown rapidly to become a well-recognised and leading provider of electrical designs for the railway industry.” Source: RevenueBase Database · checked Sep 17, 2026
21	JSJ Smart Homes	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	1-10	9 contacts →
	Indirect evidence “JSJ Smart Homes was formed as a specialised contractor in the field of domestic installations, covering all aspects of electrical installs, such as home automation and data…” Source: RevenueBase Database · checked Sep 17, 2026
22	Sehv Services Limited	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	8 contacts →
	Partial evidence “LV and HV Electrical Consultancy and Engineering Services to Renewable Energy Markets and Industrial and Commercial Sectors” Source: RevenueBase Database · checked Sep 17, 2026
23	R P Bray Electrical Contractors	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	6 contacts →
	Indirect evidence “R P Bray carry out electrical installation works to domestic, commercial and industrial projects, complete with design and testing facilities, specializing in the hotel, leisure…” Source: RevenueBase Database · checked Sep 17, 2026
24	Total Electric Solutions LTD	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	6 contacts →
	Indirect evidence “Established in 2006, Total Electric Solutions Ltd provides a complete electrical package from the design & tendering process through to the final installation & after care.” Source: RevenueBase Database · checked Sep 17, 2026
25	TH Electrical & Mechanical LTD	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	6 contacts →
	Indirect evidence “TH ELECTRICAL & MECHANICAL LTD is a construction company based in London and operating throughout London and the South East, delivering the full range of mechanical, electrical &…” 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: power systems engineering companies. 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 power systems engineering companies.
Partial evidence: Its own public description names part of power systems engineering companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name power systems engineering companies. 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 187 power systems engineering companies based in London, United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 906 reachable decision-makers.

Free signup · no credit card

View the full list →

Power systems engineering companies based in London, United Kingdom at a glance

As of Sep 17, 2026

34.0%Verified-email coverage

14.2Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

116

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 187 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 power systems engineering 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 London, United Kingdom whose own description of what they do matches “power systems engineering 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 power systems engineering 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 power systems engineering companies, 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, 906 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.

Power systems engineering companies by metro in the United Kingdom

Power systems engineering companies in London187
Power systems engineering companies in Manchester60
Power systems engineering companies in Nottingham43
Power systems engineering companies in Bristol37
Power systems engineering companies in Glasgow35
Power systems engineering companies in Leeds31
Power systems engineering companies in Sheffield29
Power systems engineering companies in Southampton27
Power systems engineering companies in Birmingham25

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 power systems engineering 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 power systems engineering companies are there based in London, United Kingdom?

RevenueBase identified 187 power systems engineering companies 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 power systems engineering companies?

London leads with 187 headquartered companies, followed by Manchester (60) and Nottingham (43).

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 906 verified decision-maker contacts tracked across these 187 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 187 power systems engineering companies based in London, United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

Power systems engineering companies by geography

Browse the directory

Browse: Companies home · Power systems engineering companies in United Kingdom · All United Kingdom lists · All Power systems engineering companies 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.