Company lists · Data refreshed September 2026

Top 25 Power supply equipment for telecommunications based in the United Kingdom

Name: Power supply equipment for telecommunications 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 113 companies tracked

RevenueBase identified 113 power supply equipment for telecommunications headquartered in the United Kingdom as of September 2026 and tracks 2,666 professional contacts across them, including 1,093 with verified work emails. London is the largest hub.

This list covers power supply equipment for telecommunications 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

113Companies

2,666Contacts tracked

1,093Verified emails

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The 25 largest power supply equipment for telecommunications based in the United Kingdom

Ranked by team size

Top 25 of 113 power supply equipment for telecommunications 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 power supply equipment for telecommunications: 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	Lucy Electric	Partial evidence	Thame, United KingdomHQ checked Sep 17, 2026	1,001-5,000	1,238 contacts →
	Partial evidence “Lucy Electric is a leader in secondary power distribution solutions with over 100 years’ industry experience.” Source: RevenueBase Database · checked Sep 17, 2026
2	Dale Power Solutions	Partial evidence	Scarborough, United KingdomHQ checked Sep 17, 2026	201-500	214 contacts →
	Partial evidence “Founded in 1935 Dale Power Solutions Ltd have been providing reliable; secure power solutions for mission critical services & systems throughout the world.” Source: RevenueBase Database · checked Sep 17, 2026
3	Tdk-Lambda UK	Indirect evidence	Ilfracombe, United KingdomHQ checked Sep 17, 2026	201-500	113 contacts →
	Indirect evidence “TDK-Lambda UK is a unit of the TDK Corporation, a leading global electronics company.” Source: RevenueBase Database · checked Sep 17, 2026
4	Riello UPS LTD	Strong evidence	Wrexham, United KingdomHQ checked Sep 17, 2026	51-200	95 contacts →
	Strong evidence “Riello UPS Ltd is a leader in the manufacture of uninterruptible power supplies (UPS) from 400 VA to 6.4 MVA and standby generators from 8 kVA to 2.5 MVA.” Source: RevenueBase Database · checked Sep 17, 2026
5	Durata	Partial evidence	Middlesbrough, United KingdomHQ checked Sep 17, 2026	11-50	47 contacts →
	Partial evidence “Durata is the trusted partner your business needs for critical power, legacy optimisation and modular data centre solutions.” Source: RevenueBase Database · checked Sep 17, 2026
6	Fivefour Engineering Services	Partial evidence	Theale, United KingdomHQ checked Sep 17, 2026	51-200	35 contacts →
	Partial evidence “FiveFour Engineering Service work within the United Kingdom, Central Europe and Scandinavia for clients that have power requirements in either traditional methods of new build or…” Source: RevenueBase Database · checked Sep 17, 2026
7	PE Systems LTD	Partial evidence	Wigan, United KingdomHQ checked Sep 17, 2026	51-200	29 contacts →
	Partial evidence “PE Systems are a UK OEM specialising in both AC/DC Power Protection Solutions.” Source: RevenueBase Database · checked Sep 17, 2026
8	Powertecnique	Indirect evidence	Portsmouth, United KingdomHQ checked Sep 17, 2026	51-200	27 contacts →
	Indirect evidence “Powertecnique is a UK based manufacturer of UPS and diesel generators.” Source: RevenueBase Database · checked Sep 17, 2026
9	TMC LTD	Strong evidence	Maldon, United KingdomHQ checked Sep 17, 2026	11-50	24 contacts →
	Strong evidence “TMC (Transformer Manufacturing Company) is a British manufacturer of transformers, power distribution equipment, and associated wound products, with a heritage dating back to 1981.” Source: RevenueBase Database · checked Sep 17, 2026
10	Ensmart Power Conversion & Energy Storage	Strong evidence	Braintree, United KingdomHQ checked Sep 17, 2026	11-50	23 contacts →
	Strong evidence “EnSmart Power is one of the UK’s largest providers of energy storage systems and a global specialist in the design and manufacture of uninterruptible power supplies and power…” Source: RevenueBase Database · checked Sep 17, 2026
11	BCL Power	Partial evidence	Milton Keynes, United KingdomHQ checked Sep 17, 2026	11-50	21 contacts →
	Partial evidence “Established in 1994, BCL Power was originally a stationary battery maintenance company.” Source: RevenueBase Database · checked Sep 17, 2026
12	Luso Electronics	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	19 contacts →
	Strong evidence “Luso Electronics - Your Power and Microwave Specialist We are a leading provider of innovative power supply and microwave solutions, committed to quality and excellence in serving…” Source: RevenueBase Database · checked Sep 17, 2026
13	Prism Power Group	Partial evidence	Watford, United KingdomHQ checked Sep 17, 2026	11-50	19 contacts →
	Partial evidence “Prism Power Group is a global Switchgear and Critical Power Systems provider based in London, UK.” Source: RevenueBase Database · checked Sep 17, 2026
14	Mercury Power LTD	Partial evidence	Surrey, United KingdomHQ checked Sep 17, 2026	11-50	18 contacts →
	Partial evidence “Mercury Power Limited have an extensive team of experienced industry experts who specialise in all critical power projects.” Source: RevenueBase Database · checked Sep 17, 2026
15	Specialist Power Systems Limited	Strong evidence	Kempston Hardwick, United KingdomHQ checked Sep 17, 2026	11-50	14 contacts →
	Strong evidence “At Specialist Power Systems it is our mission to be the leading independent supplier of secure power equipment and services in the UK.” Source: RevenueBase Database · checked Sep 17, 2026
16	Powerstax LTD	Partial evidence	Wickford, United KingdomHQ checked Sep 17, 2026	11-50	14 contacts →
	Partial evidence “We are an SME that specialises in providing innovative power solutions worldwide to a variety of industries.” Source: RevenueBase Database · checked Sep 17, 2026
17	On-Systems	Partial evidence	Letchworth, United KingdomHQ checked Sep 17, 2026	11-50	14 contacts →
	Partial evidence “On-systems has vast experience solving power challenges worldwide since being founded in 2010 by engineer Mike Harvey.” Source: RevenueBase Database · checked Sep 17, 2026
18	Ecopac UK Power LTD	Partial evidence	Long Crendon, United KingdomHQ checked Sep 17, 2026	11-50	13 contacts →
	Partial evidence “Ecopac (UK) Power Ltd are authorised distributors for MEAN WELL, Eaglerise, EU Chips and Vox Power.” Source: RevenueBase Database · checked Sep 17, 2026
19	Critical Power Supplies LTD	Strong evidence	Thame, United KingdomHQ checked Sep 17, 2026	11-50	13 contacts →
	Strong evidence “Critical Power Supplies is a leading independent UK multi-brand supplier of critical power and energy solutions including uninterruptible power supplies and standby power…” Source: RevenueBase Database · checked Sep 17, 2026
20	RMD Power Protection & Cooling	Partial evidence	Alloa, United KingdomHQ checked Sep 17, 2026	11-50	12 contacts →
	Partial evidence “RMD is an independent specialist in integrated power and cooling solutions.” Source: RevenueBase Database · checked Sep 17, 2026
21	Ashley Edison International LTD	Partial evidence	Guildford, United KingdomHQ checked Sep 17, 2026	51-200	12 contacts →
	Partial evidence “Boldly future-oriented while never losing sight of the past, Ashley-Edison(UK) is a time-tested that delivers trusted power quality solutions to your electrical systems-without…” Source: RevenueBase Database · checked Sep 17, 2026
22	Alan Campbell Engineering Services Limited Acesl	Partial evidence	Stoke-on-trent, United KingdomHQ checked Sep 17, 2026	11-50	11 contacts →
	Partial evidence “At Alan Campbell Engineering Services Ltd, our mission statement is to supply our customers with repair and refurbishment services, spares, systems, training and services on time…” Source: RevenueBase Database · checked Sep 17, 2026
23	Ideal Power LTD	Partial evidence	Barnstaple, United KingdomHQ checked Sep 17, 2026	1-10	11 contacts →
	Partial evidence “Ideal Power are the experts in providing Power Conversion Solutions, with over 40 years specialist knowledge in the Power Industry; specifying, sourcing and distributing a wide…” Source: RevenueBase Database · checked Sep 17, 2026
24	FSP GB LTD	Strong evidence	St. Albans, United KingdomHQ checked Sep 17, 2026	n/a	11 contacts →
	Strong evidence “FSP Group is the global leading innovator in the power supply unit sector with over employee worldwide, design and produces over 60 million PSU per year.” Source: RevenueBase Database · checked Sep 17, 2026
25	Sunpower Electronics	Strong evidence	Aldermaston, United KingdomHQ checked Sep 17, 2026	11-50	10 contacts →
	Strong evidence “UK-based specialist in power supplies and energy storage solutions, delivering high-performance and reliable products tailored to industrial, commercial and specialised…” 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 supply equipment for telecommunications. 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 supply equipment for telecommunications.
Partial evidence: Its own public description names part of power supply equipment for telecommunications, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name power supply equipment for telecommunications. 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 113 power supply equipment for telecommunications based in the United Kingdom

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Power supply equipment for telecommunications based in the United Kingdom at a glance

As of Sep 17, 2026

41.0%Verified-email coverage

23.6Average contacts per company

11-50Median size (employees)

6.2%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

5,001-10,000

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 113 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 supply equipment for telecommunications, 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 “power supply equipment for telecommunications”. 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 supply equipment for telecommunications), 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 supply equipment for telecommunications, 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, 1,093 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.

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 supply equipment for telecommunications, 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 supply equipment for telecommunications are there based in the United Kingdom?

RevenueBase identified 113 power supply equipment for telecommunications 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?

Lucy Electric, headquartered in Thame, tops this list with the largest team on record.

Which city has the most power supply equipment for telecommunications?

London leads with 7 headquartered companies, followed by Nottingham (3) and Aldermaston (2).

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 1,093 verified decision-maker contacts tracked across these 113 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.