Company lists · Data refreshed September 2026

Top 25 Energy storage startups based in the United Kingdom

Name: Energy storage startups based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 302 companies tracked

RevenueBase identified 302 energy storage startups headquartered in the United Kingdom as of September 2026 and tracks 6,367 professional contacts across them, including 3,344 with verified work emails. London is the largest hub.

This list covers energy storage startups 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 16, 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 16, 2026 86% judged on-target in blind review

302Companies

6,367Contacts tracked

3,344Verified emails

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The 25 largest energy storage startups based in the United Kingdom

Ranked by team size

Top 25 of 302 energy storage startups based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to energy storage startups: 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	Clarke Energy	Partial evidence	Liverpool, United KingdomHQ checked Sep 16, 2026	1,001-5,000	1,049 contacts →
	Partial evidence “Clarke Energy, a Rehlko company, specialises in energy efficient, low carbon and flexible energy systems.” Source: RevenueBase Database · checked Sep 16, 2026
2	Sonnedix	Strong evidence	London, United KingdomHQ checked Sep 16, 2026	501-1,000	563 contacts →
	Strong evidence “Sonnedix is a global renewable energy company delivering 100% clean electricity directly to customers through a diversified portfolio of solar, wind, and storage assets.” Source: RevenueBase Database · checked Sep 16, 2026
3	Reon Energy Limited	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	201-500	402 contacts →
	Partial evidence “Reon Energy is a leading Cleantech company deploying Intelligent Renewable Energy Microgrids across South Asia, GCC & African region.” Source: RevenueBase Database · checked Sep 16, 2026
4	Zenobē	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	201-500	336 contacts →
	Partial evidence “We're Zenobē Energy and we're on a mission to make clean power accessible.” Source: RevenueBase Database · checked Sep 16, 2026
5	Intec Energy Solutions	Strong evidence	London, United KingdomHQ checked Sep 16, 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 16, 2026
6	Ethical Power	Indirect evidence	Exeter, United KingdomHQ checked Sep 16, 2026	51-200	231 contacts →
	Indirect evidence “Ethical Power Group launched in the UK in 2010.” Source: RevenueBase Database · checked Sep 16, 2026
7	FIELD	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	179 contacts →
	Partial evidence “We're creating the renewable energy infrastructure and trading company of the future.” Source: RevenueBase Database · checked Sep 16, 2026
8	Cero Generation	Strong evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	145 contacts →
	Strong evidence “We’re focused on developing and delivering utility-scale solar and battery energy storage system (BESS) projects that power the transition to a cleaner, more resilient energy…” Source: RevenueBase Database · checked Sep 16, 2026
9	Statera Energy	Strong evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	142 contacts →
	Strong evidence “Statera Energy is a UK-based energy company that develops, owns, and operates flexible generation, battery storage, pumped hydro and green hydrogen projects.” Source: RevenueBase Database · checked Sep 16, 2026
10	Powerstar	Indirect evidence	Sheffield, United KingdomHQ checked Sep 16, 2026	51-200	135 contacts →
	Indirect 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 16, 2026
11	Habitat Energy	Strong evidence	Oxford, United KingdomHQ checked Sep 16, 2026	11-50	114 contacts →
	Strong evidence “Habitat Energy provide a state-of-the-art optimisation and trading platform for grid-scale battery storage and renewables in the UK, US, and Australia.” Source: RevenueBase Database · checked Sep 16, 2026
12	Givenergy	Indirect evidence	Newcastle Under Lyme, United KingdomHQ checked Sep 16, 2026	51-200	101 contacts →
	Indirect evidence “GivEnergy – No.” Source: RevenueBase Database · checked Sep 16, 2026
13	EKU Energy	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	87 contacts →
	Partial evidence “Eku Energy is a specialist, technology-enabled developer dedicated to accelerating the energy transition.” Source: RevenueBase Database · checked Sep 16, 2026
14	Private Energy Partners	Partial evidence	Swindon, United KingdomHQ checked Sep 16, 2026	51-200	84 contacts →
	Partial evidence “Private Energy Partners (PEP) is an affiliate of Quinbrook, a specialist investment manager focused exclusively on the infrastructure needed to drive the energy and digital…” Source: RevenueBase Database · checked Sep 16, 2026
15	Sunamp	Strong evidence	Edinburgh, United KingdomHQ checked Sep 16, 2026	51-200	79 contacts →
	Strong evidence “Sunamp’s space-saving thermal energy storage uses patented phase change materials to make homes and buildings more energy-efficient and sustainable.” Source: RevenueBase Database · checked Sep 16, 2026
16	Innova	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	77 contacts →
	Partial evidence “Innova is a forward-thinking renewable energy business, employing people across two offices in London and Cheltenham.” Source: RevenueBase Database · checked Sep 16, 2026
17	Harmony Energy	Strong evidence	Knaresborough, United KingdomHQ checked Sep 16, 2026	51-200	73 contacts →
	Strong evidence “Founded in 2010, Harmony Energy is one of the UK’s leading developers, owners and operators of utility-scale battery energy storage.” Source: RevenueBase Database · checked Sep 16, 2026
18	Aura Power	Partial evidence	Bristol, United KingdomHQ checked Sep 16, 2026	11-50	58 contacts →
	Partial evidence “Aura Power is a renewable energy investor, developer and adviser.” Source: RevenueBase Database · checked Sep 16, 2026
19	Evoenergy	Partial evidence	Nottingham, United KingdomHQ checked Sep 16, 2026	11-50	54 contacts →
	Partial evidence “Driving the market through innovation, EvoEnergy are the UK’s leading energy technology solutions provider, helping blue-chip clients and SME’s turn their sites into ‘sustainable…” Source: RevenueBase Database · checked Sep 16, 2026
20	Elements Green	Strong evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	51 contacts →
	Strong evidence “Elements Green (EG) is a leading renewable energy developer headquartered in London, specialising in utility-scale solar PV systems and battery energy storage solutions.” Source: RevenueBase Database · checked Sep 16, 2026
21	Ylem Energy	Partial evidence	Manchester, United KingdomHQ checked Sep 16, 2026	51-200	51 contacts →
	Partial evidence “YLEM Energy is a leading independent power generation specialist with more than three decades’ experience in building, owning and operating smart generation systems.” Source: RevenueBase Database · checked Sep 16, 2026
22	Island Green Power	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	48 contacts →
	Partial evidence “Island Green Power specialises in the development of utility-scale solar projects and battery storage systems with operations across the UK, Spain, Italy, Australia and New…” Source: RevenueBase Database · checked Sep 16, 2026
23	Verlume	Strong evidence	Inverurie, United KingdomHQ checked Sep 16, 2026	11-50	48 contacts →
	Strong evidence “Verlume is a leader in intelligent energy management and storage technologies for the energy industry.” Source: RevenueBase Database · checked Sep 16, 2026
24	Connected Energy	Strong evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 16, 2026	11-50	44 contacts →
	Strong evidence “Connected Energy is a world leader in battery energy storage.” Source: RevenueBase Database · checked Sep 16, 2026
25	Noriker Power LTD	Partial evidence	Cheltenham, United KingdomHQ checked Sep 16, 2026	51-200	43 contacts →
	Partial evidence “With rocketing fossil energy prices driving a cost of living crisis, the renewable energy transition has never been in greater focus.” Source: RevenueBase Database · checked Sep 16, 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: energy storage startups. 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 energy storage startups.
Partial evidence: Its own public description names part of energy storage startups, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy storage startups. 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 302 energy storage startups based in the United Kingdom

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Energy storage startups based in the United Kingdom at a glance

As of Sep 16, 2026

52.5%Verified-email coverage

21.1Average contacts per company

1-10Median size (employees)

29.1%Largest-city concentration · London

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

160

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 302 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 energy storage startups, 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 “energy storage startups”. 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 energy storage startups), 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 energy storage startups, 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, 3,344 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 16, 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.

Energy storage startups by metro

Energy storage startups in London88

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 energy storage startups, 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 energy storage startups are there based in the United Kingdom?

RevenueBase identified 302 energy storage startups 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?

Clarke Energy, headquartered in Liverpool, tops this list with the largest team on record.

Which city has the most energy storage startups?

London leads with 88 headquartered companies, followed by Edinburgh (6) and Sheffield (6).

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 3,344 verified decision-maker contacts tracked across these 302 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 16, 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.