Company lists · Data refreshed September 2026

Top 25 Hydro power installation companies based in the United Kingdom

Name: Hydro power installation 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 20, 2026 91 companies tracked

RevenueBase identified 91 hydro power installation companies headquartered in the United Kingdom as of September 2026 and tracks 2,983 professional contacts across them, including 714 with verified work emails. London is the largest hub.

This list covers hydro power installation 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 20, 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 20, 2026 86% judged on-target in blind review

91Companies

2,983Contacts tracked

714Verified emails

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The 25 largest hydro power installation companies based in the United Kingdom

Ranked by team size

Top 25 of 91 hydro power installation companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to hydro power installation 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	Freedom	Partial evidence	Leeds, United KingdomHQ checked Sep 20, 2026	1,001-5,000	664 contacts →
	Partial evidence “Freedom is a leading provider of facilities and power engineering services.” Source: RevenueBase Database · checked Sep 20, 2026
2	Eastgate Engineering	Indirect evidence	Thornaby-on-tees, United KingdomHQ checked Sep 20, 2026	201-500	163 contacts →
	Indirect evidence “Eastgate Engineering is an Electrical and Instrumentation contractor that delivers complex, high-risk infrastructure projects with cost certainty, without compromising safety or…” Source: RevenueBase Database · checked Sep 20, 2026
3	PN Daly Limited	Indirect evidence	Rochdale, United KingdomHQ checked Sep 20, 2026	501-1,000	141 contacts →
	Indirect evidence “P.N.” Source: RevenueBase Database · checked Sep 20, 2026
4	Powersystems	Indirect evidence	Bristol, United KingdomHQ checked Sep 20, 2026	51-200	126 contacts →
	Indirect evidence “Powered by People.” Source: RevenueBase Database · checked Sep 20, 2026
5	Gilbert Gilkes And Gordon LTD	Indirect evidence	Kendal, United KingdomHQ checked Sep 20, 2026	51-200	104 contacts →
	Indirect evidence “Gilkes delivers innovative, single source solutions to the Small Hydropower and High Horsepower Engine markets.” Source: RevenueBase Database · checked Sep 20, 2026
6	Dulas LTD	Partial evidence	Machynlleth, United KingdomHQ checked Sep 20, 2026	51-200	64 contacts →
	Partial evidence “With over 35 years of experience in the clean energy sector, Dulas is an award-winning renewable energy installer and consultancy, specialising in the wind, solar and hydro…” Source: RevenueBase Database · checked Sep 20, 2026
7	Kelvin Power Member Of Vinci Energies	Partial evidence	Leicester, United KingdomHQ checked Sep 20, 2026	51-200	57 contacts →
	Partial evidence “Kelvin Power provides expert advice and design solutions to the global power industry and the renewable energy sector.” Source: RevenueBase Database · checked Sep 20, 2026
8	Durkin And Sons Power And Civil Engineers	Indirect evidence	Perivale, United KingdomHQ checked Sep 20, 2026	51-200	35 contacts →
	Indirect evidence “Durkin and Sons have for 40 years been a go-to partner for National Grid, and DNO organisations, who continue to entrust the delivery of large HV & EHV cabling projects to us.” Source: RevenueBase Database · checked Sep 20, 2026
9	B&s Group LTD	Partial evidence	Chester, United KingdomHQ checked Sep 20, 2026	11-50	29 contacts →
	Partial evidence “B&S Group is an innovative, high growth engineering business delivering full-service solutions for power and renewable energy networks.” Source: RevenueBase Database · checked Sep 20, 2026
10	Enisca	Partial evidence	Cookstown, United KingdomHQ checked Sep 20, 2026	51-200	28 contacts →
	Partial evidence “Enisca is a multi-disciplinary design, engineering and construction business operating in the power and environmental sectors delivering innovative, sustainable and quality…” Source: RevenueBase Database · checked Sep 20, 2026
11	Green Highland A Voith Company	Indirect evidence	Perth, United KingdomHQ checked Sep 20, 2026	11-50	22 contacts →
	Indirect evidence “We are one of the leading developers and operators of hydropower.” Source: RevenueBase Database · checked Sep 20, 2026
12	Switchon Power	Partial evidence	Stourbridge, United KingdomHQ checked Sep 20, 2026	11-50	20 contacts →
	Partial evidence “SwitchOn Power is a specialized engineering company, focusing on renewable energy generation projects.” Source: RevenueBase Database · checked Sep 20, 2026
13	Hydroplan UK	Indirect evidence	Wimborne, United KingdomHQ checked Sep 20, 2026	11-50	19 contacts →
	Indirect evidence “Hydroplan is a leading UK hydropower consultancy specialising in the design, construction and project management of small to medium sized hydropower projects in the UK and…” Source: RevenueBase Database · checked Sep 20, 2026
14	EPS Construction LTD	Indirect evidence	Swansea, United KingdomHQ checked Sep 20, 2026	11-50	17 contacts →
	Indirect evidence “EPS Construction is your full service engineering partner, offering solutions in your everyday needs.” Source: RevenueBase Database · checked Sep 20, 2026
15	Grid Team Services LTD	Indirect evidence	Maghera, United KingdomHQ checked Sep 20, 2026	11-50	16 contacts →
	Indirect evidence “Grid Team Services efficiently constructs and installs quality end-to-end electrical transmission and distribution systems.” Source: RevenueBase Database · checked Sep 20, 2026
16	PSS Power Engineering LTD	Partial evidence	Winchester, United KingdomHQ checked Sep 20, 2026	11-50	15 contacts →
	Partial evidence “PSS POWER ENGINEERING LTD is a high-voltage electrical engineering company based in South East England, United Kingdom.” Source: RevenueBase Database · checked Sep 20, 2026
17	Central Power LTD	Partial evidence	Birmingham, United KingdomHQ checked Sep 20, 2026	11-50	14 contacts →
	Partial evidence “Central Power Ltd is a High Voltage power engineering company, specialising in the design and construction of electrical power infrastructure for high voltage customers and…” Source: RevenueBase Database · checked Sep 20, 2026
18	Powerline Electrical Services	Indirect evidence	Lisnaskea, United KingdomHQ checked Sep 20, 2026	1-10	14 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
19	HV Energy Solutions LTD	Indirect evidence	Norwich, United KingdomHQ checked Sep 20, 2026	11-50	13 contacts →
	Indirect evidence “Our distinct expertise lies in designing, engineering, maintaining, installing, testing and commissioning high-voltage substations, electrical transmission and distribution…” Source: RevenueBase Database · checked Sep 20, 2026
20	Renewables First LTD	Partial evidence	Stroud, United KingdomHQ checked Sep 20, 2026	11-50	9 contacts →
	Partial evidence “UK leader in hydropower consultancy, environmental licensing, detailed design and specification, project management and installation.” Source: RevenueBase Database · checked Sep 20, 2026
21	Square 4 Solar	Indirect evidence	Lowton, United KingdomHQ checked Sep 20, 2026	11-50	9 contacts →
	Indirect evidence “The Square 4 Solar team have over 20 years’ experience in designing and installing renewable energy systems.” Source: RevenueBase Database · checked Sep 20, 2026
22	Circle Control & Design Systems	Indirect evidence	Castleford, United KingdomHQ checked Sep 20, 2026	11-50	9 contacts →
	Indirect evidence “Established in 1995, Circle Control part of the Empower Group, is a trusted electrical contracting company based in Castleford, West Yorkshire.” Source: RevenueBase Database · checked Sep 20, 2026
23	Kntc Limited	Indirect evidence	Croydon, United KingdomHQ checked Sep 20, 2026	11-50	9 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
24	I-Connect Utilities & Renewables Limited	Indirect evidence	Brierley Hill, United KingdomHQ checked Sep 20, 2026	1-10	8 contacts →
	Indirect evidence “i-Connect Utilities & Renewables Limited: Pioneering Renewable Energy, Utilities Connections, EV Charging, Building Services, and Smart Monitoring Systems in the UK.” Source: RevenueBase Database · checked Sep 20, 2026
25	Barratt Energy	Indirect evidence	Wilmslow, United KingdomHQ checked Sep 20, 2026	11-50	8 contacts →
	Indirect evidence “Barratt Energy supplies outstanding electrical & renewable energy engineering services within the UK and Internationally.” Source: RevenueBase Database · checked Sep 20, 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: hydro power installation 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 hydro power installation companies.
Partial evidence: Its own public description names part of hydro power installation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name hydro power installation 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 91 hydro power installation companies based in the United Kingdom

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Hydro power installation companies based in the United Kingdom at a glance

As of Sep 20, 2026

23.9%Verified-email coverage

32.8Average contacts per company

1-10Median size (employees)

9.9%Largest-city concentration · London

Sep 20, 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 91 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 hydro power installation 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 “hydro power installation 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 hydro power installation 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 hydro power installation 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, 714 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 20, 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 hydro power installation 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 hydro power installation companies are there based in the United Kingdom?

RevenueBase identified 91 hydro power installation 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?

Freedom, headquartered in Leeds, tops this list with the largest team on record.

Which city has the most hydro power installation companies?

London leads with 9 headquartered companies, followed by Manchester (4) and Perth (3).

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 714 verified decision-maker contacts tracked across these 91 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 20, 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.