Company lists · Data refreshed September 2026

Top 25 Long duration energy storage companies worldwide

Name: Long duration energy storage companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 2,380 companies tracked

RevenueBase identified 2,380 long duration energy storage companies worldwide as of September 2026 and tracks 96,129 professional contacts across them, including 38,755 with verified work emails and 0 with mobile numbers. The United States is the largest market and Shenzhen the largest hub.

This list covers long duration energy storage companies worldwide, 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. Country and city lists for long duration energy storage companies follow the table.

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

2,380Companies

96,129Contacts tracked

38,755Verified emails

0Mobile numbers

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The 25 largest long duration energy storage companies worldwide

Ranked by team size

Top 25 of 2,380 long duration energy storage companies worldwide, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to long duration energy storage 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	Tata Power	Indirect evidence	Mumbai, IndiaHQ checked Sep 17, 2026	10001+	9,414 contacts →
	Indirect evidence “Tata Power is one of India’s largest integrated power companies and together with its subsidiaries and jointly controlled entities, has an installed/managed capacity of 14,294 MW.” Source: RevenueBase Database · checked Sep 17, 2026
2	Nextera Energy Resources	Partial evidence	Juno Beach, FL, United StatesHQ checked Sep 17, 2026	10001+	6,221 contacts →
	Partial evidence “NextEra Energy Resources, LLC, together with its affiliated entities,("NextEra Energy Resources") is one of the largest energy infrastructure companies in North America.” Source: RevenueBase Database · checked Sep 17, 2026
3	RES	Strong evidence	Kings Langley, United KingdomHQ checked Sep 17, 2026	1,001-5,000	3,721 contacts →
	Strong evidence “RES is the world’s largest independent renewable energy company, working across 24 countries and active in wind, solar, energy storage, green hydrogen, transmission, and…” Source: RevenueBase Database · checked Sep 17, 2026
4	ENPAL	Partial evidence	Berlin, GermanyHQ checked Sep 17, 2026	5,001-10,000	3,242 contacts →
	Partial evidence “Enpal is Europe's leading new energy company.” Source: RevenueBase Database · checked Sep 17, 2026
5	Enphase Energy	Partial evidence	Fremont, CA, United StatesHQ checked Sep 17, 2026	1,001-5,000	3,130 contacts →
	Partial evidence “Enphase Energy is a global energy technology company and the world’s leading supplier of microinverter-based solar and battery systems.” Source: RevenueBase Database · checked Sep 17, 2026
6	Innio Group	Partial evidence	Munich, GermanyHQ checked Sep 17, 2026	1,001-5,000	2,111 contacts →
	Partial evidence “INNIO Group is a global distributed energy solutions provider that delivers reliable, flexible, transient, decentralized, modular and efficient power.” Source: RevenueBase Database · checked Sep 17, 2026
7	Fluence	Strong evidence	Arlington, VA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,863 contacts →
	Strong evidence “To achieve our mission, we design, deploy, and operate the world’s most advanced modular energy storage products, comprehensive lifecycle services, and AI-enabled asset management…” Source: RevenueBase Database · checked Sep 17, 2026
8	Mitsubishi Power Americas	Indirect evidence	Lake Mary, FL, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,859 contacts →
	Indirect evidence “Mitsubishi Power Americas is creating a future that works for people and the planet through innovative power generation technology and solutions.” Source: RevenueBase Database · checked Sep 17, 2026
9	Canadian Solar INC	Partial evidence	Kitchener, ON, CanadaHQ checked Sep 17, 2026	10001+	1,781 contacts →
	Partial evidence “Canadian Solar was founded in 2001 in Canada and is one of the world's largest solar technology and renewable energy companies.” Source: RevenueBase Database · checked Sep 17, 2026
10	Avaada Group	Partial evidence	Mumbai, IndiaHQ checked Sep 17, 2026	5,001-10,000	1,747 contacts →
	Partial evidence “Avaada Group is a diversified clean energy conglomerate focused on the global energy transition, providing solutions in renewable power generation, solar PV manufacturing, green…” Source: RevenueBase Database · checked Sep 17, 2026
11	Rehlko	Partial evidence	Milwaukee, WI, United StatesHQ checked Sep 17, 2026	5,001-10,000	1,709 contacts →
	Partial evidence “Rehlko is a global leader in energy resilience, delivering the solutions critical to sustain and improve life.” Source: RevenueBase Database · checked Sep 17, 2026
12	Solv Energy	Strong evidence	San Diego, CA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,286 contacts →
	Strong evidence “SOLV Energy is a renewable energy solutions provider for utility solar, energy storage, and high voltage projects in North America.” Source: RevenueBase Database · checked Sep 17, 2026
13	Ormat Technologies, INC	Indirect evidence	Reno, NV, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,281 contacts →
	Indirect evidence “With over five decades of experience, Ormat Technologies, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
14	Recurrent Energy	Strong evidence	Austin, United StatesHQ checked Sep 17, 2026	501-1,000	931 contacts →
	Strong evidence “Recurrent Energy, a subsidiary of Canadian Solar Inc, is one of the world's largest and most geographically diversified utility-scale solar and energy storage project development…” Source: RevenueBase Database · checked Sep 17, 2026
15	Form Energy	Partial evidence	Somerville, MA, United StatesHQ checked Sep 17, 2026	501-1,000	807 contacts →
	Partial evidence “Form Energy is an American company driving innovation in energy technology and manufacturing.” Source: RevenueBase Database · checked Sep 17, 2026
16	Clearway Energy Group	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 17, 2026	501-1,000	795 contacts →
	Partial evidence “Clearway Energy Group’s vision is a world powered by clean energy.” Source: RevenueBase Database · checked Sep 17, 2026
17	IB Vogt Gmbh	Indirect evidence	Berlin, GermanyHQ checked Sep 17, 2026	501-1,000	784 contacts →
	Indirect evidence “ib vogt is firmly committed to supporting the decarbonisation of the global electricity sector.” Source: RevenueBase Database · checked Sep 17, 2026
18	SMS PLC	Partial evidence	Glasgow, United KingdomHQ checked Sep 17, 2026	1,001-5,000	766 contacts →
	Partial evidence “Through our range of innovative energy solutions, we are delivering the future of smart energy – working closely with private and public sector partners to decarbonise the UK…” Source: RevenueBase Database · checked Sep 17, 2026
19	Grenergy	Partial evidence	Madrid, SpainHQ checked Sep 17, 2026	501-1,000	699 contacts →
	Partial evidence “The on-demand energy producer empowering ever-changing lives Grenergy is a Spanish multinational clean energy producer.” Source: RevenueBase Database · checked Sep 17, 2026
20	ALFEN	Strong evidence	Almere, NetherlandsHQ checked Sep 17, 2026	501-1,000	678 contacts →
	Strong evidence “With transformer substations, energy storage systems, charging stations for electric vehicles and a diverse portfolio of other products and services, Alfen has a central and…” Source: RevenueBase Database · checked Sep 17, 2026
21	Stryten Energy	Strong evidence	Alpharetta, GA, United StatesHQ checked Sep 17, 2026	1,001-5,000	677 contacts →
	Strong evidence “Stryten Energy helps solve the world’s most pressing energy challenges with a broad range of energy storage solutions across the Essential Power, Motive Power, Transportation…” Source: RevenueBase Database · checked Sep 17, 2026
22	Strata Clean Energy	Partial evidence	Durham, NC, United StatesHQ checked Sep 17, 2026	501-1,000	631 contacts →
	Partial evidence “Strata Clean Energy is a fully integrated energy infrastructure company serving utilities, independent power producers, and hyperscalers navigating the rapid transformation of the…” Source: RevenueBase Database · checked Sep 17, 2026
23	Sonnedix	Strong evidence	London, United KingdomHQ checked Sep 17, 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 17, 2026
24	Hero Future Energies	Partial evidence	New Delhi, IndiaHQ checked Sep 17, 2026	501-1,000	544 contacts →
	Partial evidence “Hero Future Energies (An ISO 27001:2022 Certified Company) is a leading global renewable energy company and part of the illustrious Hero Group, one of the most respected business…” Source: RevenueBase Database · checked Sep 17, 2026
25	Hoppecke Batteries	Strong evidence	Brilon, GermanyHQ checked Sep 17, 2026	1,001-5,000	530 contacts →
	Strong evidence “HOPPECKE - your expert for industrial batteries & energy storage solutions The availability and securing of electricity is one of the key requirements of our society and at the…” 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: long duration energy storage 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 long duration energy storage companies.
Partial evidence: Its own public description names part of long duration energy storage companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name long duration energy storage 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 2,380 long duration energy storage companies worldwide

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Long duration energy storage companies worldwide at a glance

As of Sep 17, 2026

40.3%Verified-email coverage

40.4Average contacts per company

11-50Median size (employees)

4.1%Largest-city concentration · Shenzhen

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

860

11-50

727

51-200

430

201-500

181

501-1,000

1,001-5,000

5,001-10,000

10001+

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 long duration energy storage 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.
Coverage: 17 countries, largest first: the United States, China, Germany, the United Kingdom, the Netherlands, Australia, India, Canada, Spain, Italy and 7 more. Country and city lists for long duration energy storage companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “long duration energy storage 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 long duration energy storage 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 long duration energy storage companies, and records with no verified work email.
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, 38,755 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.

Long duration energy storage companies by location

17 lists · largest first

Every Long duration energy storage companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

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 long duration energy storage 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 long duration energy storage companies are there worldwide?

RevenueBase identified 2,380 long duration energy storage companies worldwide 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?

Tata Power, headquartered in Mumbai, tops this list with the largest team on record.

Which country has the most long duration energy storage companies?

The United States leads with 620 companies, followed by China (398) and Germany (254). Every long duration energy storage companies list by country and city is linked on this page.

Which city has the most long duration energy storage companies?

Shenzhen leads with 98 headquartered companies, followed by London (78) and Houston (35).

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 38,755 verified decision-maker contacts tracked across these 2,380 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.