Best Energy Storage Companies in United States
The 243 best Energy Storage companies in United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Exide.
$1.8 billion in disclosed funding across 243 tracked Energy Storage companies in the United States tells you something real about where capital is moving. This directory ranks them by equity raised and recent funding momentum, and the spread is stark. FlexGen leads at $361 million, which dwarfs the rest of the pack. Stryten sits second at $75 million, and then the numbers fall fast, with Johnson Energy Storage at $11 million and the remaining names clustered below $5 million each.
The global picture explains the urgency. The market sat at roughly $9.1 billion in 2019 and is forecast to reach $546 billion by 2035, a 23.61% CAGR that few sectors can match. Hot themes right now include EV battery technology, solar PV, and grid-scale stationary storage, and Pure Power's recent push into the U.S. market signals that international players see the same opportunity you do. Policy uncertainty remains the structural wildcard, I'd watch that closely before assuming permitting timelines hold. Median app install growth of 28% year-over-year across 141 energy-sector apps confirms the demand signal is real, not theoretical.
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Ranked: Best Energy Storage companies in United States
| # | Company | Disclosed funding | Last round | Employees | Founded | Founder | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Exide Manufacturer & supplier of automotive power storage systems | $408M | 83 mo ago | 354 | 1888 | W Gibbs Founder | WordPress Site EditorWordPressMySQL+6 | 90 patents Lead‑acid battery plate alloys, graphite additives, and state‑of‑charge monitoring technologies. | — |
| 2 | FlexGen Battery energy storage solutions and software platform for energy transition | $361M | 16 mo ago | 189 | 2009 | — | DrupalApple iCloud MailMicrosoft 365+21 | — | — |
| 3 | ClearEdge Power Develops fuel cells | $282M | 147 mo ago | 225 | 2003 | — | — | 55 patents High‑temperature PEM fuel cell thermal, electrolyte and power‑management systems for stationary power | — |
| 4 | Radial Power Manufacturer of batteries 60Growth top 5%News top 31%Funding top 42%Partners bottom 32% All 6 signals ▾Growthtop 5% Newstop 31% Fundingtop 42% Partnersbottom 32% Globalbottom 29% Marketbottom 24% News: 5 BI events in 12 mo (of 5 tracked, 3 types) · 3 high-value events (IPO/M&A/funding/contracts) in 12 mo rank vs industry peers · Fliar Intelligence Index 60/100 | $225M | 27 mo ago | 5 | 2022 | — | — | — | 1 launch |
| 5 | Xtreme Power Critical power solutions: UPS systems, power distribution, voltage regulation | $86M | 150 mo ago | 9 | 2004 | — | — | — | — |
| 6 | Axion Power Expert reviews of solar and wind energy products for residential use | $76M | 127 mo ago | 7 | 2003 | Richard Bogan Chairman & CEO | WordPress Block EditorWordPressMySQL+19 | 74 patents Carbon electrode sheets and protected low‑resistance current collectors for lead‑carbon batteries | — |
| 7 | Stryten Provider of stored energy solutions catering to various industries, including transportation, motive… | $75M | 9 mo ago | 2,500 | 2020 | Mike Judd Chief Executive Officer and President | WordPressMySQLPHP+32 | — | 5 job openings |
| 8 | PowerGenix Nickel-zinc battery solutions for mission-critical applications, powering a sustainable future | $72M | 140 mo ago | 40 | 2000 | — | — | 6 patents Nickel‑zinc rechargeable battery production processes and electrolyte formulations. | — |
| 9 | ChargeItSpot Intelligent locker systems for streamlined device management and reduced device shrink | $36M | 37 mo ago | 130 | 2012 | Douglas Baldasare Founder & CEO | WordPressMySQLPHP+16 | 40 patents Secure, networked public mobile device charging stations and management infrastructure | 2 job openings · 1 launch · 1 expansion |
| 10 | Keahole Solar Power Solar Energy Storage and Installation | $30M | 185 mo ago | 5 | 2007 | — | — | — | — |
| 11 | Gridtential Silicon Joule battery technology for safer, lower-cost, high-performance energy storage | $22M | 105 mo ago | 7 | 2010 | Peter Borden Co-Founder and Chief Technical Advisor | — | — | — |
| 12 | Advanced Battery Concepts Responsible energy storage solutions for a better world through advanced battery technology | $17M | 68 mo ago | 33 | 2008 | Edward Shaffer CEO & Founder | WordPress Block EditorWordPressMySQL+15 | 107 patents Patents concentrated in electrical & electronics | — |
| 13 | The Coretec Group Developer of three-dimensional video displays for medical imaging, passenger baggage, & cargo scanning | $12M | 67 mo ago | 3 | 2015 | — | WordPressMySQLPHP+23 | 14 patents Silicon-based cyclosilanes and quantum dots for advanced battery electrodes and nanomaterials | — |
| 14 | Johnson Energy Storage Manufacturer of batteries | $11M | 16 mo ago | 21 | 2021 | Lonnie G. Johnson Founder | WordPressMySQLPHP+17 | — | — |
| 15 | Pineapple Energy Retailer of solar energy storage | $8M | 36 mo ago | 255 | 2020 | Kyle Udseth CEO | — | — | — |
| 16 | Ionobell Developer of batteries | $7M | 26 mo ago | 6 | 2017 | Robert Neivert CEO | — | 55 patents Silicon and porous silicon materials for high‑capacity battery electrodes and solid‑state batteries | — |
| 17 | Princeton Power Power Electronics and Energy Storage developer | $5M | 144 mo ago | 18 | 2001 | — | — | — | — |
| 18 | Full Circle Lithium Manufacturing company with a focus on lithium and battery material reintegration | $4M | 10 mo ago | — | 2022 | Bill Bourcier Co-Founder | WordPressMySQLPHP+24 | — | 5 launchs |
| 19 | Parthian Energy Developer of batteries | $3M | 49 mo ago | — | 2017 | Farshid Roumi Co-Founder & CEO | — | — | — |
| 20 | Nxu Company specializing in EV charging and energy storage solutions | $3M | 17 mo ago | 86 | 2016 | Mark Hanchett Founder & CEO | DrupalApple iCloud MailMicrosoft 365+29 | — | — |
| 21 | CAMX Power Manufacturer of dry or wet primary batteries | $3M | 71 mo ago | — | 2014 | Kenan Sahin Founder | — | 138 patents High‑energy, long‑life lithium‑ion battery cathodes and advanced electrolytes | — |
| 22 | Intelligent Power Solutions Provider of dependable power quality sales and service solutions | $3M | 139 mo ago | 1 | 2009 | — | — | 640 patents Patents concentrated in mechanical & energy engineering | — |
| 23 | Urban Electric Power Safe, reliable zinc-based battery energy storage systems for diverse applications | $3M | 11 mo ago | 42 | 2013 | — | WordPress Block EditorDiviWordPress+27 | — | — |
| 24 | Shift Thermal Provider of ice thermal energy storage solutions for HVAC systems | $3M | 10 mo ago | 8 | 2017 | Levon Atoyan Co-Founder | — | — | — |
| 25 | Indie Energy Provider of energy storage systems | $2M | 124 mo ago | 8 | 2016 | Eric Schrock President and CEO | — | — | — |
| 26 | Natrion Provides affordable energy storage solutions | $2M | 0 mo ago | 3 | 2017 | Yoshihiro Takahashi Co-Founder | — | 13 patents Solid-state electrolytes and interphase stabilizers for high-performance lithium batteries | — |
| 27 | LERC Manufacturer of low emissions commercial energy storage products | $2M | 127 mo ago | 7 | 2015 | Deron Pearson Co-Founder | — | — | — |
| 28 | Skip Technology Manufacturer of lithium ion batteries | $1M | 19 mo ago | 5 | 2018 | — | — | 3 patents Network traffic management and data queuing algorithms for communication systems | — |
| 29 | Octet Scientific Manufacturer of batteries | $1M | 37 mo ago | 9 | 2017 | — | — | — | 1 partnership |
| 30 | Nomad Transportable Power Systems Provider of mobile battery energy storage solutions for clean and sustainable power | $943K | 8 mo ago | 4 | 2020 | — | WebflowLeafletMapbox.js+16 | — | — |
| 31 | Imagen Energy Manufacturer of batteries | $898K | 69 mo ago | 8 | 2016 | — | — | — | — |
| 32 | CrossLink Composites Manufacturer of batteries | $552K | 70 mo ago | 6 | 2017 | Connie Jackson Chief Executive Officer | — | 5 patents Lightweight carbon‑fiber fuel tanks for aerospace and automotive applications | — |
| 33 | Westwater Resources Mining and exploration company focused on production of graphite, vanadium and lithium deposits | $551K | 84 mo ago | 15 15 → 21 (+40%) | 1977 | — | WordPressMySQLPHP+17 | — | 1 expansion |
| 34 | AGreatE Manufacturer of lithium ion battery based portable power supplies | $500K | 67 mo ago | 11 | 2017 | — | — | — | — |
| 35 | Mobile Power Solutions Lithium-ion battery solutions: design, assembly, testing for diverse applications | $300K | 197 mo ago | 19 | 2004 | — | Cart FunctionalityWooCommerceWordPress+22 | — | — |
| 36 | Otoro Energy Manufacturer of flow batteries | $275K | 29 mo ago | — | 2020 | Michael Marshak Founder & CEO | — | — | — |
| 37 | Quantum Copper Manufacturer of components for batteries | $275K | 18 mo ago | 5 | 2016 | — | — | — | — |
| 38 | Higher Wire Manufacturer of lithium-ion batteries for stationary and mobile energy storage | $268K | 35 mo ago | 2 | 2021 | Trevor Warren Founder & CEO | PageFlyCart FunctionalityShopify+30 | — | — |
| 39 | Novusterra Manufacturer of lithium ion batteries | $250K | 42 mo ago | 4 | 2021 | Gregory Jensen CEO | — | — | — |
| 40 | Astrolabe Analytics Provides cloud computing and machine learning focused software for battery companies | $250K | 72 mo ago | 3 | 2018 | Robert Masse CEO | — | — | — |
| 41 | Valgotech Manufacturer of batteries | $250K | 75 mo ago | 4 | 2018 | David Olawale Co-Founder | — | 2 patents Solvent‑free manufacturing of solid‑state battery electrodes and electrolytes | — |
| 42 | HeXalayer Developer of batteries | $225K | 88 mo ago | 2 | 2017 | Harut Vardanyan Co-Founder & CEO | — | — | — |
| 43 | American Mobile Power Systems Manufacturer of lithium polymer batteries | $200K | 183 mo ago | — | 2010 | Jay Fuhr CEO | — | — | — |
| 44 | Kepler Energy Systems Provider of global renewable energy solutions | $150K | 49 mo ago | — | 2019 | Greg Treseder Chief Executive Officer | — | — | — |
| 45 | Naca Fermentation Manufacturer of batteries for mobiles | $120K | 120 mo ago | 2 | 2015 | — | — | — | — |
| 46 | New Day Hydrogen Provider of energy storage services | $100K | 36 mo ago | — | 2020 | Seth Terry CEO | — | — | — |
| 47 | Siva Cycle Manufacturer of rechargeable battery for bicycles | $100K | 137 mo ago | — | 2012 | Aaron Latzke Co-Founder | — | — | — |
Top 12 Energy Storage companies in United States
#1
Series C · Durham, North Carolina · founded 2009 · 189 employees$361.2Mraised▾
Battery energy storage solutions and software platform for energy transition. They design and integrate battery energy storage solutions, offering a software platform that enables the energy transition. Their expertise lies in delivering utility-scale battery storage projects with energy management software. They provide solutions for data centers, EMS retrofits, and de-risking services, including supply chain management and regulatory compliance. They serve independent power producers, developers, EPCs, municipalities, utilities, and critical infrastructure providers. Their offerings include energy management system software, advanced battery analytics, activation services, and lifecycle services. The company focuses on maximizing asset performance, extending asset life, and ensuring grid reliability. They offer enhanced cybersecurity and supply chain resilience through their US-based Battery Management System. The company's modular EMS software and services cater to various phases of BESS projects, navigating the complexities of the modern energy landscape.
- Jan 2025Conventional Debt$75M
- Jul 2022Series C$100M
- Aug 2021Series B$150M
- Sep 2018Conventional Debt$7M
#2
Funding Raised · Alpharetta, Georgia · founded 2020 · 2500 employees$74.9Mraised▾
Stryten Energy is a leading provider of stored energy solutions, catering to various industries such as transportation, motive, stationary, and military. The company offers a range of products and services designed to address the world's most pressing energy challenges. With a strong focus on innovation, Stryten Energy aims to challenge the status quo and drive progress in the field of energy storage.
- Sep 2025Grant (prize money)$37.4M
- Mar 2025Grant (prize money)$37.4M
#3
Series B · Greenwich, Connecticut · founded 2017 · 3 employees$2.1Mraised▾
Provides affordable energy storage solutions
- Nov 2025Series B$4.6M
- Mar 2024Series A$4.4M
- May 2022Seed$2M
- Aug 2020Seed$40.8K
#4
Public · Nahunta, Georgia · founded 2022$4.4Mraised▾
Full Circle Lithium is a Georgia-based full-service battery material processing company focused on lithium and battery material reintegration. They offer a proprietary lithium-ion battery fire extinguishing agent and have recently acquired a lithium processing facility in Georgia.
- Aug 2025Post IPO$3.3M
- Jul 2024Post IPO$1.2M
#5
Series A · New York City, New York · founded 2013 · 42 employees$2.6Mraised▾
Safe, reliable zinc-based battery energy storage systems for diverse applications. They deliver modular, zinc-based battery energy storage systems designed for real-world operations. Their solutions are trusted by universities, critical facilities, and commercial operations nationwide, engineered for fast installs, easy permitting, and lasting performance. They offer integrated energy storage systems complete with power conversion, controllers, and thermal management. Their commercial cabinet is a versatile system for seamless integration of zinc battery technology in indoor commercial and industrial settings, enhancing energy reliability and reducing operational costs. The pod system is an innovative outdoor solution for advanced zinc battery technology, ensuring safety and longevity while providing efficient power storage for grid and commercial applications. They also provide battery management systems, a smart, integrated platform that ensures safe, efficient, and reliable operation of every battery unit. Their technology uses safe, non-toxic, recyclable materials without lead, heavy metals, or flammable electrolytes, and offers substantial cost benefits because of the extended
- Jul 2025Grant (prize money)$6.5M
- May 2025Grant (prize money)$6.5M
- Aug 2023Grant (prize money)$700K
- Jun 2018Series A$997.5K
#6
Series A · Atlanta, Georgia · founded 2021 · 21 employees$10.8Mraised▾
Manufacturer of batteries
- Feb 2025Series A$1M
- Jan 2024Series A$10.7M
- Nov 2021Seed$125K
#7
Funding Raised · Houston, Texas · founded 2022 · 5 employees$225Mraised▾
Manufacturer of batteries
- Feb 2024Conventional Debt$225M
#8
Seed · Oak Ridge, Tennessee · founded 2017 · 8 employees$2.5Mraised▾
Provider of ice thermal energy storage solutions for HVAC systems. It provides an innovative heat exchanger called IHEX, which is used in ice thermal energy storage applications.
- Jul 2025Seed$1M
- Jun 2020Grant (prize money)$1.3M
- Feb 2019Grant (prize money)$224.9K
#9
Seed · Waterbury, Vermont · founded 2020 · 4 employees$943.1Kraised▾
Nomad Power is a company that aims to reimagine clean energy by pushing past traditional energy storage boundaries. They provide reliable energy systems that can be deployed virtually anywhere they're needed, offering sustainable and clean solutions to replace diesel generators.
- Sep 2025Grant (prize money)$9.5M
- May 2025Grant (prize money)$9.5M
- Aug 2023Seed$943.1K
#10
Public · Tempe, Arizona · founded 2016 · 86 employees$3Mraised▾
Nxu Inc. is a domestic technology company specializing in innovative EV charging and energy storage solutions. They are committed to designing and building equipment that is less complicated and more capable for a sustainable world of work.
- Dec 2024Post IPO$3M
#11
Acquired · Milton, Georgia · founded 1888 · 354 employees$407.5Mraised▾
Exide Technologies is a manufacturer & supplier of automotive batteries. Its products include batteries for cars, SUVs, trucks, golf carts & more. It also serves telecom & marine sectors. Its major markets are the Asia Pacific, Europe, America, Africa & the Middle East.
- Jul 2019Conventional Debt$150M
- Jun 2019Series C$175M
- Jun 2019Series C$232.5M
- Jun 2016Grant (prize money)$30.7M
#12
Series A · Philadelphia, Pennsylvania · founded 2012 · 130 employees$35.8Mraised▾
Intelligent locker systems for streamlined device management and reduced device shrink. The company provides intelligent locker solutions designed to secure, charge, and monitor employee devices across various industries. Their system minimizes device theft and loss, boosts productivity, and reduces wasted payroll time. The company's solutions offer device charging and management, putting businesses in control of their device fleets. They empower businesses and ground teams alike with thoughtfully designed, locker-based kiosk solutions. The company's system helps managers reduce device loss and overstock, increase employee productivity, save valuable payroll hours, and improve a device's cost of ownership. They offer a centralized device management system designed to secure, charge, and monitor employee devices. The company's solutions streamline device management, reduce device shrink, and improve overall operational efficiency.
- Apr 2023Series A$19.8M
- Jan 2022Series A$6.9M
- Jun 2016Series A$750K
- Dec 2015Series A$404.7K
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Energy Storage coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on Grid Energy Storage is moving in the United States
A read on the academic research around Grid Energy Storage — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 5,941 United States-affiliated papers.
- Electric Power Research Institute204
- Pacific Northwest National Laboratory202
- Argonne National Laboratory193
- Northeastern University151
- Massachusetts Institute of Technology124
- Battery (electricity)57→359
- Electrolyte37→318
- Electrochemistry30→240
- Cathode32→224
- Anode37→209
- Renewable energy40→492
- Battery (electricity)59→507
- Power (physics)8→227
- Electrolyte27→244
- Electrochemistry37→240
- Battery (electricity)35→184
- Renewable energy24→156
- Electrolyte13→114
- Electrochemistry10→80
- Cathode9→72
Where energy storage is researched across United States
Location clusters by institution affiliation — each city's volume, stance tone, and a quick read on its hot topic, what's advancing, the opening opportunity, and the main concern.
Who's filing energy storage patents in the United States
United States energy storage patent filing is accelerating — 8,522 filings from 3,681 assignees (2016–2025), led by General Electric, ESS Technology, GM Global TECH Operations; annual filings 687→1058.
- General Electric592
- ESS Technology276
- GM Global TECH Operations233
- Fastcap Systems205
- UNIV California180
- Rondo Energy157
- United Technologies154
- Battelle Memorial Institute146
Common questions
Riya reads income statements for fun. She covers the real money in a sector — revenue, growth, who actually earns — and never met a vague claim she didn't want a number for.