Company lists · Data refreshed September 2026

Top 25 Backup power systems companies based in the United Kingdom

Name: Backup power systems companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 194 companies tracked

RevenueBase identified 194 backup power systems companies headquartered in the United Kingdom as of September 2026 and tracks 3,770 professional contacts across them, including 1,019 with verified work emails. London is the largest hub.

This list covers backup power systems companies 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 19, 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 19, 2026 86% judged on-target in blind review

194Companies

3,770Contacts tracked

1,019Verified emails

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The 25 largest backup power systems companies based in the United Kingdom

Ranked by team size

Top 25 of 194 backup power systems companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to backup power systems 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	FG Wilson	Indirect evidence	Larne, United KingdomHQ checked Sep 19, 2026	1,001-5,000	468 contacts →
	Indirect evidence “Founded in 1966, FG Wilson is a leading global supplier of diesel generator sets with a strong heritage of quality, support and value.” Source: RevenueBase Database · checked Sep 19, 2026
2	Dale Power Solutions	Strong evidence	Scarborough, United KingdomHQ checked Sep 19, 2026	201-500	214 contacts →
	Strong 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 19, 2026
3	Finning Power & Energy	Partial evidence	Cannock, United KingdomHQ checked Sep 19, 2026	1,001-5,000	141 contacts →
	Partial evidence “Finning Power & Energy is a division of Finning, the sole dealer for Caterpillar in the UK & Ireland.” Source: RevenueBase Database · checked Sep 19, 2026
4	Powerstar	Partial evidence	Sheffield, United KingdomHQ checked Sep 19, 2026	51-200	135 contacts →
	Partial evidence “A D2Zero Company With a 24-year track record, Powerstar is an industry leader in electrification, specialising in designing and manufacturing cutting-edge power management tech…” Source: RevenueBase Database · checked Sep 19, 2026
5	ADE Power	Partial evidence	Pontefract, United KingdomHQ checked Sep 19, 2026	201-500	125 contacts →
	Partial evidence “ADE Power have over 25 years of experience at the forefront of the design, manufacture, and fit-out of precision engineered acoustic and modular enclosures for the packaging of…” Source: RevenueBase Database · checked Sep 19, 2026
6	Power Control LTD	Strong evidence	Eckington, United KingdomHQ checked Sep 19, 2026	51-200	97 contacts →
	Strong evidence “Power Control Ltd is now proudly part of Legrand, a leading European manufacturer of innovative, reliable, and efficient UPS systems.” Source: RevenueBase Database · checked Sep 19, 2026
7	Riello UPS LTD	Partial evidence	Wrexham, United KingdomHQ checked Sep 19, 2026	51-200	95 contacts →
	Partial 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 19, 2026
8	Yorpower	Indirect evidence	Sherburn In Elmet, United KingdomHQ checked Sep 19, 2026	51-200	93 contacts →
	Indirect evidence “YorPower are multi award winning company with their head office based in the UK.” Source: RevenueBase Database · checked Sep 19, 2026
9	Shenton Group	Strong evidence	Andover, United KingdomHQ checked Sep 19, 2026	51-200	85 contacts →
	Strong evidence “The UK's leading Technical Experts in Standby Power, Uninterruptible Power Supplies and Combined Heat & Power Systems.” Source: RevenueBase Database · checked Sep 19, 2026
10	DTGEN	Strong evidence	Milngavie, United KingdomHQ checked Sep 19, 2026	51-200	79 contacts →
	Strong evidence “From our 6.3-acre HQ in Glasgow, and further sites in Bristol and Rugby, we supply, install and maintain diesel and gas generators, combined heat and power systems (CHP), solar…” Source: RevenueBase Database · checked Sep 19, 2026
11	UPS Systems PLC	Strong evidence	Swindon, United KingdomHQ checked Sep 19, 2026	11-50	51 contacts →
	Strong evidence “UPS Systems PLC are the UK’s leading independent supplier of standby power and occupy a unique position in the provision of back-up power solutions to businesses of all sizes.” Source: RevenueBase Database · checked Sep 19, 2026
12	Norco Group Limited	Indirect evidence	Dyce, United KingdomHQ checked Sep 19, 2026	51-200	49 contacts →
	Indirect evidence “From beginnings in the battery rental market in 1991, Norco Group are now a major force in the electrical energy storage industry.” Source: RevenueBase Database · checked Sep 19, 2026
13	AJ Power LTD	Partial evidence	Craigavon, United KingdomHQ checked Sep 19, 2026	51-200	41 contacts →
	Partial evidence “Based at a modern facility in Northern Ireland, UK, AJ Power produces diesel generating sets from 10kVA to 2800kVA using automotive manufacturing techniques, for use in hospitals…” Source: RevenueBase Database · checked Sep 19, 2026
14	PB Design Evjuicengo	Partial evidence	Clevedon, United KingdomHQ checked Sep 19, 2026	51-200	41 contacts →
	Partial evidence “PB DESIGN Since its foundation in 1979, PB Design has worked ceaselessly to develop and bring to the market a full range of battery chargers, UPS, batteries and system services…” Source: RevenueBase Database · checked Sep 19, 2026
15	BPC Energy LTD	Partial evidence	Romsey, United KingdomHQ checked Sep 19, 2026	11-50	35 contacts →
	Partial evidence “BPC manufacture and distribute a wide range of UPS and related power protection products aimed at the Computer Networking, Telecom, Midrange Computer, Emergency Lighting and Three…” Source: RevenueBase Database · checked Sep 19, 2026
16	Fivefour Engineering Services	Partial evidence	Theale, United KingdomHQ checked Sep 19, 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 19, 2026
17	Secure Power	Strong evidence	Sheffield, United KingdomHQ checked Sep 19, 2026	11-50	31 contacts →
	Strong evidence “Secure Power is a leading provider of backup power solutions, ensuring reliability and efficiency for businesses across many sectors.” Source: RevenueBase Database · checked Sep 19, 2026
18	P&i Group	Partial evidence	Havant, United KingdomHQ checked Sep 19, 2026	11-50	31 contacts →
	Partial evidence “P&I Group (formerly P&I Generators) are trusted Critical Power Specialists, delivering generator and UPS solutions across the UK since As a family-run business, we pride ourselves…” Source: RevenueBase Database · checked Sep 19, 2026
19	Powertecnique	Indirect evidence	Portsmouth, United KingdomHQ checked Sep 19, 2026	51-200	27 contacts →
	Indirect evidence “Powertecnique is a UK based manufacturer of UPS and diesel generators.” Source: RevenueBase Database · checked Sep 19, 2026
20	Pleavin Power	Indirect evidence	Wirral, United KingdomHQ checked Sep 19, 2026	11-50	25 contacts →
	Indirect evidence “Delivering on our promise to be a reliable, effective and powerful solution for your business.” Source: RevenueBase Database · checked Sep 19, 2026
21	Ensmart Power Conversion & Energy Storage	Strong evidence	Braintree, United KingdomHQ checked Sep 19, 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 19, 2026
22	BCL Power	Partial evidence	Milton Keynes, United KingdomHQ checked Sep 19, 2026	11-50	21 contacts →
	Partial evidence “Established in 1994, BCL Power was originally a stationary battery maintenance company.” Source: RevenueBase Database · checked Sep 19, 2026
23	Pharos Generator Services Limited	Partial evidence	Runcorn, United KingdomHQ checked Sep 19, 2026	11-50	20 contacts →
	Partial evidence “Pharos Generator Services with over 60 years’ experience in the power generation industry, specialise in the supply, installation, commissioning, repair and servicing of diesel…” Source: RevenueBase Database · checked Sep 19, 2026
24	Metartec	Partial evidence	Pinner, United KingdomHQ checked Sep 19, 2026	11-50	20 contacts →
	Partial evidence “Metartec are Critical Power Specialists.” Source: RevenueBase Database · checked Sep 19, 2026
25	Prism Power Group	Strong evidence	Watford, United KingdomHQ checked Sep 19, 2026	11-50	19 contacts →
	Strong evidence “Prism Power Group is a global Switchgear and Critical Power Systems provider based in London, UK.” Source: RevenueBase Database · checked Sep 19, 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: backup power systems 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 backup power systems companies.
Partial evidence: Its own public description names part of backup power systems companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name backup power systems 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 194 backup power systems companies based in the United Kingdom

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Backup power systems companies based in the United Kingdom at a glance

As of Sep 19, 2026

27.0%Verified-email coverage

19.4Average contacts per company

11-50Median size (employees)

4.6%Largest-city concentration · London

Sep 19, 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 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 194 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 backup power systems 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 the United Kingdom whose own description of what they do matches “backup power systems 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 backup power systems 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 backup power systems companies, 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, 1,019 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 19, 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 backup power systems 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 backup power systems companies are there based in the United Kingdom?

RevenueBase identified 194 backup power systems companies 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?

FG Wilson, headquartered in Larne, tops this list with the largest team on record.

Which city has the most backup power systems companies?

London leads with 9 headquartered companies, followed by Bristol (4) and Manchester (4).

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 1,019 verified decision-maker contacts tracked across these 194 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 19, 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.