Company lists · Data refreshed September 2026

Top 25 Flow battery technology companies based in the United Kingdom

Name: Flow battery technology 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 81 companies tracked

RevenueBase identified 81 flow battery technology companies headquartered in the United Kingdom as of September 2026 and tracks 1,129 professional contacts across them, including 642 with verified work emails. London is the largest hub.

This list covers flow battery technology 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

81Companies

1,129Contacts tracked

642Verified emails

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The 25 largest flow battery technology companies based in the United Kingdom

Ranked by team size

Top 25 of 81 flow battery technology 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 flow battery technology 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	Zenobē	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	336 contacts →
	Indirect evidence “We're Zenobē Energy and we're on a mission to make clean power accessible.” Source: RevenueBase Database · checked Sep 19, 2026
2	Invinity Energy Systems	Strong evidence	Liverpool Street, United KingdomHQ checked Sep 19, 2026	51-200	159 contacts →
	Strong evidence “Invinity Energy Systems plc (AIM:IES) manufactures vanadium flow batteries for the large-scale energy storage requirements of businesses, industry and electricity networks.” Source: RevenueBase Database · checked Sep 19, 2026
3	Givenergy	Indirect evidence	Newcastle Under Lyme, United KingdomHQ checked Sep 19, 2026	51-200	101 contacts →
	Indirect evidence “GivEnergy – No.” Source: RevenueBase Database · checked Sep 19, 2026
4	Voltwise Power	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	42 contacts →
	Indirect evidence “Voltwise develops, owns and operates flexible energy storage solutions that allow rapid deployment of renewables.” Source: RevenueBase Database · checked Sep 19, 2026
5	KX Power Limited	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	35 contacts →
	Partial evidence “KX Power is a leading developer and asset manager of utility scale energy storage and flexibility technology headquartered in the UK.” Source: RevenueBase Database · checked Sep 19, 2026
6	Power Saving Solutions UK	Indirect evidence	Nottingham, United KingdomHQ checked Sep 19, 2026	51-200	31 contacts →
	Indirect evidence “Power Saving Solutions UK began as an electrical contractor.” Source: RevenueBase Database · checked Sep 19, 2026
7	Powervault	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	30 contacts →
	Indirect evidence “At Powervault, we are on a mission to pioneer a sustainable energy future.” Source: RevenueBase Database · checked Sep 19, 2026
8	Gaussion	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	17 contacts →
	Partial evidence “Gaussion creates energy intelligence - the intelligent control layer inside every battery pack.” Source: RevenueBase Database · checked Sep 19, 2026
9	ALLYE	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	16 contacts →
	Partial evidence “Intelligent, flexible battery energy storage that solves grid constraints and works wherever power is needed, not just where the grid allows it.” Source: RevenueBase Database · checked Sep 19, 2026
10	Eelpower	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	14 contacts →
	Indirect evidence “We construct, own and operate large scale, front of meter, energy storage solutions.” Source: RevenueBase Database · checked Sep 19, 2026
11	Stortera	Indirect evidence	Edinburgh, United KingdomHQ checked Sep 19, 2026	11-50	13 contacts →
	Indirect evidence “StorTera is an Edinburgh based energy storage solution provider.” Source: RevenueBase Database · checked Sep 19, 2026
12	Global Nano Network	Strong evidence	Coventry, United KingdomHQ checked Sep 19, 2026	1-10	13 contacts →
	Strong evidence “Global Nano Network is a technology company solving battery power density and cycle life issues with HyperFoil®, a high-performance current collector that is form factor and…” Source: RevenueBase Database · checked Sep 19, 2026
13	Haliogen Power	Partial evidence	Manchester, United KingdomHQ checked Sep 19, 2026	1-10	13 contacts →
	Partial evidence “HalioGen Power enables the world’s decarbonisation by providing a resilient, sustainable and affordable technology to make renewable energy accessible anywhere, anytime, and for…” Source: RevenueBase Database · checked Sep 19, 2026
14	Happy Electron	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	11 contacts →
	Indirect evidence “Happy Electron is developing electric energy storages and electric energy generation devices for high-performance applications.” Source: RevenueBase Database · checked Sep 19, 2026
15	ILI Group	Indirect evidence	Hamilton, United KingdomHQ checked Sep 19, 2026	1-10	10 contacts →
	Indirect evidence “Intelligent Land Investments Group (ILI Group) works primarily in the Renewable energy and Energy Storage markets.” Source: RevenueBase Database · checked Sep 19, 2026
16	Batri LTD	Strong evidence	Bridgend, United KingdomHQ checked Sep 19, 2026	1-10	10 contacts →
	Strong evidence “Using its sodium-ion battery technology, its enhanced lithium-ion battery processing capabilities, and its portfolio of intellectual property that has been amassed over ten years…” Source: RevenueBase Database · checked Sep 19, 2026
17	Aceleron	Partial evidence	Stoke Prior, United KingdomHQ checked Sep 19, 2026	11-50	9 contacts →
	Partial evidence “Aceleron is an innovative UK-based advanced lithium battery developer aiming to accelerate the global shift to cleaner, more renewable energy and to empower people to benefit from…” Source: RevenueBase Database · checked Sep 19, 2026
18	Alpha House LTD	Indirect evidence	Southampton, United KingdomHQ checked Sep 19, 2026	1-10	8 contacts →
	Indirect evidence “Alpha House Ltd leads the charge in innovative and sustainable energy storage solutions.” Source: RevenueBase Database · checked Sep 19, 2026
19	Alphaess UK	Partial evidence	Dursley, United KingdomHQ checked Sep 19, 2026	11-50	7 contacts →
	Partial evidence “AlphaESS UK is the exclusive partner of AlphaESS, a global leader in advanced battery energy storage solutions.” Source: RevenueBase Database · checked Sep 19, 2026
20	RFC Power	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	7 contacts →
	Strong evidence “Low cost, long duration hybrid flow batteries for grid energy storage applications” Source: RevenueBase Database · checked Sep 19, 2026
21	Alcemi	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	1-10	7 contacts →
	Indirect evidence “We develop large-scale energy storage projects at key locations, alleviating grid constraints and enabling the transition to renewable energy.” Source: RevenueBase Database · checked Sep 19, 2026
22	Eqonic	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	7 contacts →
	Partial evidence “EQONIC Group is a British technology company creating and delivering transformative energy storage technologies to help the world transition towards a zero emissions future.” Source: RevenueBase Database · checked Sep 19, 2026
23	Capture Energy	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	1-10	6 contacts →
	Partial evidence “Capture Energy is Europe’s first battery-backed power company.” Source: RevenueBase Database · checked Sep 19, 2026
24	Kona Energy UK	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	1-10	5 contacts →
	Partial evidence “Kona Energy is one of the UK’s leading clean energy development companies - advancing grid-scale battery energy storage projects.” Source: RevenueBase Database · checked Sep 19, 2026
25	Energy Storage Africa	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	1-10	4 contacts →
	Partial evidence “ESA is an innovative company which offers large-scale battery energy storage systems to African utilities, governments and IPPs.” 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: flow battery technology 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 flow battery technology companies.
Partial evidence: Its own public description names part of flow battery technology companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name flow battery technology 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 81 flow battery technology companies based in the United Kingdom

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Flow battery technology companies based in the United Kingdom at a glance

As of Sep 19, 2026

56.9%Verified-email coverage

13.9Average contacts per company

1-10Median size (employees)

35.8%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 81 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 flow battery technology 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 “flow battery technology 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 flow battery technology 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 flow battery technology 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, 642 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.

Flow battery technology companies by metro

Flow battery technology companies in London29

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 flow battery technology 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 flow battery technology companies are there based in the United Kingdom?

RevenueBase identified 81 flow battery technology 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?

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

Which city has the most flow battery technology companies?

London leads with 29 headquartered companies, followed by Bristol (2) and Cambridge (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 642 verified decision-maker contacts tracked across these 81 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.