Company lists · Data refreshed September 2026

Top 25 Energy storage system suppliers based in the United States

Name: Energy storage system suppliers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 394 companies tracked

RevenueBase identified 394 energy storage system suppliers headquartered in the United States as of September 2026 and tracks 11,408 professional contacts across them, including 4,752 with verified work emails. Houston is the largest hub.

This list covers energy storage system suppliers headquartered in the United States, 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

394Companies

11,408Contacts tracked

4,752Verified emails

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The 25 largest energy storage system suppliers based in the United States

Ranked by team size

Top 25 of 394 energy storage system suppliers based in the United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to energy storage system suppliers: 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	Fluence	Strong evidence	Arlington, VA, United StatesHQ checked Sep 16, 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 16, 2026
2	Form Energy	Partial evidence	Somerville, MA, United StatesHQ checked Sep 16, 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 16, 2026
3	EOS Energy Enterprises, INC	Partial evidence	Edison, NJ, United StatesHQ checked Sep 16, 2026	501-1,000	435 contacts →
	Partial evidence “Eos is on a mission to build a future with limitless energy-with abundant energy that is reliable enough to fuel humanity’s limitless potential.” Source: RevenueBase Database · checked Sep 16, 2026
4	Octillion Power Systems	Strong evidence	Richmond, CA, United StatesHQ checked Sep 16, 2026	1,001-5,000	335 contacts →
	Strong evidence “Octillion is a California-based Tier 1 supplier of innovative high-density battery systems and related technology focused on the electrification of major industries such as…” Source: RevenueBase Database · checked Sep 16, 2026
5	Flexgen	Strong evidence	Durham, NC, United StatesHQ checked Sep 16, 2026	201-500	271 contacts →
	Strong evidence “FlexGen delivers the best integrated energy storage systems by taking a functionality and software-first approach.” Source: RevenueBase Database · checked Sep 16, 2026
6	Malta INC	Indirect evidence	Cambridge, MA, United StatesHQ checked Sep 16, 2026	n/a	264 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
7	LG Energy Solution Vertech, INC	Partial evidence	Westborough, MA, United StatesHQ checked Sep 16, 2026	51-200	244 contacts →
	Partial evidence “LG Energy Solution Vertech, Inc.(LGES Vertech) delivers exceptional customer engagement throughout every stage of acquiring, installing, and operating advanced, reliable, and…” Source: RevenueBase Database · checked Sep 16, 2026
8	Antora Energy	Partial evidence	San Jose, CA, United StatesHQ checked Sep 16, 2026	201-500	242 contacts →
	Partial evidence “Antora Energy delivers affordable, reliable energy to industry, data centers, and the grid.” Source: RevenueBase Database · checked Sep 16, 2026
9	POWIN	Partial evidence	Tualatin, OR, United StatesHQ checked Sep 16, 2026	501-1,000	242 contacts →
	Partial evidence “Since 2010, Powin has been working to mitigate the economic and environmental impacts of climate change by revolutionizing the way energy is generated, transmitted, and…” Source: RevenueBase Database · checked Sep 16, 2026
10	Jupiter Power	Strong evidence	Austin, TX, United StatesHQ checked Sep 16, 2026	51-200	188 contacts →
	Strong evidence “Jupiter Power is putting deep energy storage expertise, proven project execution capability, and significant capital to work to help make the energy transition a reality.” Source: RevenueBase Database · checked Sep 16, 2026
11	Trismart Solar	Partial evidence	Houston, TX, United StatesHQ checked Sep 16, 2026	201-500	167 contacts →
	Partial evidence “Our mission is to help people achieve energy independence quickly, easily, and affordably using the power of the sun and teamwork.” Source: RevenueBase Database · checked Sep 16, 2026
12	Pure Power Engineering	Partial evidence	Hoboken, NJ, United StatesHQ checked Sep 16, 2026	51-200	165 contacts →
	Partial evidence “Founded in 2011, Pure Power Engineering is the premier engineering firm in the solar + storage industry.” Source: RevenueBase Database · checked Sep 16, 2026
13	Sol-Ark	Strong evidence	Allen, TX, United StatesHQ checked Sep 16, 2026	51-200	156 contacts →
	Strong evidence “Sol-Ark is a Veteran owned solar and energy storage technology company with the mission of helping everyone be less dependent on our vulnerable power grid with innovative…” Source: RevenueBase Database · checked Sep 16, 2026
14	Rondo Energy	Indirect evidence	Alameda, CA, United StatesHQ checked Sep 16, 2026	51-200	145 contacts →
	Indirect evidence “We're hiring!” Source: RevenueBase Database · checked Sep 16, 2026
15	Lion Energy	Partial evidence	American Fork, UT, United StatesHQ checked Sep 16, 2026	51-200	138 contacts →
	Partial evidence “Lion Energy is building the future of intelligent energy infrastructure.” Source: RevenueBase Database · checked Sep 16, 2026
16	CS Energy	Partial evidence	Edison, NJ, United StatesHQ checked Sep 16, 2026	51-200	128 contacts →
	Partial evidence “CS Energy is now part of SOLV Energy.” Source: RevenueBase Database · checked Sep 16, 2026
17	Esvolta, LP	Strong evidence	Newport Beach, CA, United StatesHQ checked Sep 16, 2026	51-200	119 contacts →
	Strong evidence “Focused on sustainability and innovation, esVolta develops, owns, and operates reliable utility-scale energy storage assets across the entire lifecycle - delivering value for…” Source: RevenueBase Database · checked Sep 16, 2026
18	KEY Capture Energy	Strong evidence	Albany, NY, United StatesHQ checked Sep 16, 2026	51-200	114 contacts →
	Strong evidence “Key Capture Energy identifies, develops, constructs and operates energy storage solutions to foster greater deployment of renewable energy, create a more stable electric grid, and…” Source: RevenueBase Database · checked Sep 16, 2026
19	Plugpv	Strong evidence	Troy, NY, United StatesHQ checked Sep 16, 2026	51-200	109 contacts →
	Strong evidence “PlugPV is a premier solar energy and battery storage provider.” Source: RevenueBase Database · checked Sep 16, 2026
20	Eg4 Electronics	Strong evidence	Dallas-fort Worth, United StatesHQ checked Sep 16, 2026	51-200	102 contacts →
	Strong evidence “EG4 Electronics is a global leader in the design and manufacture of next-generation solar energy storage systems.” Source: RevenueBase Database · checked Sep 16, 2026
21	Franklinwh Energy Storage INC	Strong evidence	San Jose, CA, United StatesHQ checked Sep 16, 2026	201-500	100 contacts →
	Strong evidence “FranklinWH Energy Storage is the manufacturer of the FranklinWH System, a next-generation home energy management and storage solution.” Source: RevenueBase Database · checked Sep 16, 2026
22	Enervenue	Strong evidence	Fremont, CA, United StatesHQ checked Sep 16, 2026	201-500	99 contacts →
	Strong evidence “EnerVenue is commercializing energy storage systems designed to behave like infrastructure, prioritizing endurance, safety, and lifecycle economics over short-term optimization.” Source: RevenueBase Database · checked Sep 16, 2026
23	Canter Power Systems	Partial evidence	Greensboro, NC, United StatesHQ checked Sep 16, 2026	51-200	88 contacts →
	Partial evidence “Canter Power Systems is a Generac Power Premier Pro dealer and one of the largest independent installers of home standby generators in the U.S.” Source: RevenueBase Database · checked Sep 16, 2026
24	Amber Kinetics	Strong evidence	Union City, CA, United StatesHQ checked Sep 16, 2026	51-200	88 contacts →
	Strong evidence “Amber Kinetics is the industry-leader in manufacturing flywheel energy storage systems (FESS).” Source: RevenueBase Database · checked Sep 16, 2026
25	Doosan Gridtech	Strong evidence	Bellevue, WA, United StatesHQ checked Sep 16, 2026	51-200	86 contacts →
	Strong evidence “Doosan GridTech® has been providing end-to-end energy storage solutions since 2011.” 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 system suppliers. 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 system suppliers.
Partial evidence: Its own public description names part of energy storage system suppliers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy storage system suppliers. 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 394 energy storage system suppliers based in the United States

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Energy storage system suppliers based in the United States at a glance

As of Sep 16, 2026

41.7%Verified-email coverage

29.0Average contacts per company

11-50Median size (employees)

3.6%Largest-city concentration · Houston

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

141

11-50

147

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 394 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 system suppliers, 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 States whose own description of what they do matches “energy storage system suppliers”. 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 system suppliers), 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 system suppliers, and records with no verified work email. Companies headquartered outside United States 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, 4,752 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.

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 system suppliers, 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 system suppliers are there based in the United States?

RevenueBase identified 394 energy storage system suppliers headquartered in the United States 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?

Fluence, headquartered in Arlington, tops this list with the largest team on record.

Which city has the most energy storage system suppliers?

Houston leads with 14 headquartered companies, followed by New York (12) and San Diego (12).

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 4,752 verified decision-maker contacts tracked across these 394 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.