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Founded Year



Series C | Alive

Total Raised


Last Raised

$100M | 1 yr ago

About FlexGen Power Systems

FlexGen Power Systems is a company that focuses on energy management, specifically within the battery storage sector. The company offers an integrated energy storage system and a software platform, HybridOS, which manages battery storage in a user-friendly and reliable manner. FlexGen primarily serves sectors that require large-scale energy storage solutions. It was founded in 2009 and is based in Durham, North Carolina.

Headquarters Location

280 S. Mangum Street, Ste. 150

Durham, North Carolina, 27701,

United States



ESPs containing FlexGen Power Systems

The ESP matrix leverages data and analyst insight to identify and rank leading companies in a given technology landscape.

Industrials / Energy Tech

Grid storage providers are companies that offer energy storage solutions for power grids. These solutions can help balance the supply and demand of electricity, improve grid stability, and integrate renewable energy sources. Grid storage providers typically offer a range of technologies, including batteries, flywheels, and pumped hydro storage.

FlexGen Power Systems named as Leader among 15 other companies, including Powin, Ambri, and Form Energy.

FlexGen Power Systems's Products & Differentiators

    Battery Energy Storage Systems (BESS)

    FlexGen provides "full wrap" or "procurement only" of Battery Energy Storage Systems ranging in size from 150kW to 450MW+.


Research containing FlexGen Power Systems

Get data-driven expert analysis from the CB Insights Intelligence Unit.

CB Insights Intelligence Analysts have mentioned FlexGen Power Systems in 1 CB Insights research brief, most recently on Apr 19, 2023.

Expert Collections containing FlexGen Power Systems

Expert Collections are analyst-curated lists that highlight the companies you need to know in the most important technology spaces.

FlexGen Power Systems is included in 5 Expert Collections, including Grid and Utility.


Grid and Utility

1,675 items

Companies that are developing and implementing new technologies to optimize the grid and utility sector. This includes, but is not limited to, distributed energy resources, infrastructure security, utility asset management, grid inspection, energy efficiency, grid storage, etc.


Energy Storage

1,238 items

Companies in the Energy Storage space, including those developing and manufacturing energy storage solutions such as lithium-ion batteries, solid-state batteries, and related software for battery management.


Auto Tech

1,408 items

Companies developing battery electric vehicles (BEVs) and fuel cell vehicles (FCEVs) as well as companies working on improvements to battery design, building out charging infrastructure, and launching EV sharing services to help accelerate adoption.


Energy Management Software

610 items

Companies creating software to help manage, optimize, and automate energy management and optimization.


Decarbonization Tech

616 items

Companies in the Decarbonization & ESG space, including those working on enterprise and cross-industry decarbonization and emissions monitoring solutions, as well as ESG monitoring and carbon accounting.

FlexGen Power Systems Patents

FlexGen Power Systems has filed 11 patents.

The 3 most popular patent topics include:

  • energy storage
  • electrical engineering
  • electric power distribution
patents chart

Application Date

Grant Date


Related Topics




Energy storage, Analog circuits, Electrical engineering, Electronic circuits, Linear filters


Application Date


Grant Date



Related Topics

Energy storage, Analog circuits, Electrical engineering, Electronic circuits, Linear filters



Latest FlexGen Power Systems News

Hithium and FlexGen Sign Cooperation Agreement

Nov 21, 2023

Author of the article: Article content DURHAM, N.C. — Stationary battery manufacturer Hithium has signed an initial cooperation agreement with FlexGen, the leading energy storage software integration and service provider. The companies agreed to purchasing targets over the next three years, with the North Carolina-based FlexGen aiming to support the procurement of 10 GWh of battery capacity from Hithium either through project efforts or indirectly from partners utilizing FlexGen’s energy management system (EMS), the HybridOS software and controls. At the same time, Hithium committed to the goal of securing, directly or through partners, FlexGen’s EMS for projects with a combined 15 GWh of capacity. Advertisement 2 THIS CONTENT IS RESERVED FOR SUBSCRIBERS ONLY Subscribe now to read the latest news in your city and across Canada. Exclusive articles from Barbara Shecter, Joe O'Connor, Gabriel Friedman, Victoria Wells and others. Daily content from Financial Times, the world's leading global business publication. Unlimited online access to read articles from Financial Post, National Post and 15 news sites across Canada with one account. National Post ePaper, an electronic replica of the print edition to view on any device, share and comment on. Daily puzzles, including the New York Times Crossword. SUBSCRIBE TO UNLOCK MORE ARTICLES Subscribe now to read the latest news in your city and across Canada. Exclusive articles from Barbara Shecter, Joe O'Connor, Gabriel Friedman, Victoria Wells and others. Daily content from Financial Times, the world's leading global business publication. Unlimited online access to read articles from Financial Post, National Post and 15 news sites across Canada with one account. National Post ePaper, an electronic replica of the print edition to view on any device, share and comment on. Daily puzzles, including the New York Times Crossword. REGISTER TO UNLOCK MORE ARTICLES Create an account or sign in to continue with your reading experience. Access articles from across Canada with one account. Share your thoughts and join the conversation in the comments. Enjoy additional articles per month. Get email updates from your favourite authors. or Article content Try refreshing your browser, or Hithium and FlexGen Sign Cooperation Agreement Back to video As part of the agreement, FlexGen will also be an authorized service provider for Hithium in the United States, accelerating the speed of service to asset owners and enhancing asset uptime. Keeping energy storage assets available for owners is a key shared value described by both parties. Article content Hithium Head of Global Business Mizhi Zhang commented: “We are very excited for the opportunity to work more closely with the team at FlexGen and benefit from their expertise in the U.S. energy storage market. The cutting-edge capabilities of their EMS will also bring significant added value to our product offering.” Yann Brandt, Chief Commercial Officer of FlexGen said: “FlexGen and our partners share the vision of flexible, high performance battery storage assets. Hithium’s technology, tailor-made for utility-scale storage, packaged with our HybridOS operating system, provides great value to our mutual customers.” FlexGen designs multi-megawatt energy storage systems, integrated with its proprietary energy management system, the HybridOS, along with managing procurement, testing, commissioning, and offering monitoring and maintenance services. Hithium manufactures high-efficiency battery products, from cells like its 314 Ah with an 11,000-cycle life, to energy storage systems including its newly released 5 MWh ∞block. Based in Xiamen, China, with operations in the U.S., Australia, UAE, and Europe, the company has shipped 11 GWh of capacity since being founded in 2019. About HiTHIUM Founded in 2019, HiTHIUM is a leading manufacturer of top-quality stationary energy storage products for utility-scale as well as commercial and industrial applications. With four distinct R&D centers and multiple “intelligent” production facilities, HiTHIUM’s innovations include groundbreaking safety improvements to its lithium-ion batteries as well as increases in lifecycle. With many decades of cumulative experience in the field among its founders and senior executives, HiTHIUM leverages its specialization in BESS to deliver partners and customers unique advances in energy storage. The company is based in Xiamen, China, with further locations for production, research, or sales in Shenzhen, Chongqing, Munich, and California. HiTHIUM has shipped 11 GWh of battery capacity, 5 GWh in 2022 alone, and is expanding its production capacity to 70 GWh by the end of 2023. Advertisement 3 Article content About FlexGen Power Systems, Inc. Based in Durham, N.C., FlexGen is a leading integration services and software technology provider for energy storage solutions in the United States and globally. FlexGen designs and integrates storage solutions and the software platform that is enabling today’s energy transition. Leveraging its best-in-class energy management software and digital controls, FlexGen delivers utility-scale storage projects integrated with traditional and renewable power generation globally. The company‘s clients and partners include the most technically and commercially demanding developers, utilities, government agencies and industrial companies in the world. To learn more, visit . View source version on Contacts

FlexGen Power Systems Frequently Asked Questions (FAQ)

  • When was FlexGen Power Systems founded?

    FlexGen Power Systems was founded in 2009.

  • Where is FlexGen Power Systems's headquarters?

    FlexGen Power Systems's headquarters is located at 280 S. Mangum Street, Ste. 150, Durham.

  • What is FlexGen Power Systems's latest funding round?

    FlexGen Power Systems's latest funding round is Series C.

  • How much did FlexGen Power Systems raise?

    FlexGen Power Systems raised a total of $286.14M.

  • Who are the investors of FlexGen Power Systems?

    Investors of FlexGen Power Systems include Vitol Group, Altira Group, GE Ventures, Caterpillar Ventures and Apollo Global Management.

  • Who are FlexGen Power Systems's competitors?

    Competitors of FlexGen Power Systems include One-Cycle Control and 4 more.

  • What products does FlexGen Power Systems offer?

    FlexGen Power Systems's products include Battery Energy Storage Systems (BESS) and 1 more.


Compare FlexGen Power Systems to Competitors


REDI (Renewable Energy Development, Inc.) is a developer of large format and high voltage ultracapacitors for energy storage. REDI produces both electric double-layer capacitors (EDLC's) and pseudocapacitors for numerous applications including automotive, renewable energy generation, and consumer electronics. The company's devices are smaller and lighter that their competition while offering better performance and flexible form factors.

Vortex Hydro Energy

Vortex Hydro Energy is a company focused on the renewable energy sector, specifically hydrokinetic power generation. The company's main product is the VIVACE converter, a device that harnesses the energy of slow-moving river and ocean currents to generate electricity. This technology does not rely on propellers like traditional water turbines, but instead uses the physical phenomenon of vortex induced vibration, where water current flows around cylinders, inducing motion that is then converted into electricity. It is based in Ypsilati, Michigan.


Windsave Ltd., established in 2002, is a dynamic Scottish company within the Renewable Energy sector. The company are focused on developing micro generation solutions for domestic and commercial properties. The Windsave System is a small wind turbine generator system, which uses low wind speeds to create electricity. nnThe Windsave System uses the company's technology, which generates electricity supplementary to the national grid supply, reducing reliance on traditional energy sources; benefiting the environment, and helping to lower domestic electricity bills and CO2 emissions. nnMany people have the desire to protect the environment; the company's challenge from the beginning has been to turn that desire into action. The company's aim is to enable householders, commercial enterprises and local authorities to move from being mere consumers of energy to becoming important contributors to overall energy requirements. nnThe company's technology has been fully and independently tested by the National Engineering Laboratory and is fully accredited by the DTI under the Low Carbon Building Programme (formerly known as The Clear Skies Programme). It is BS and CE approved.

Choren Industrietechnik

Choren Industrietechnik is an engineering service-provider and licensor, offering the planning, layout and installation of systems for synthesis gas generation according to the CCG process.

Garbrook Knowledge Resources

Garbrook Knowledge Resources is a company that received a SBIR Phase I grant for a project entitled: Targeted Information Products Built from a Curated Knowledge Base. Their project addresses the problem of integrating advanced computational and curation techniques. Curated knowledge resources are important in fields like genomics, but have not yet made a significant impact in other fields like renewable energy. The purpose of a curated knowledge product is to provide comprehensive, non-redundant, concise, and unbiased information in a field where information is otherwise scattered and hard for users to gather objectively. Garbrook has built an encyclopedic knowledge base, the Advanced Biofuels Resource, to organize scientific, commercial, and policy-related information for the Biofuels community. This proposal will develop automated methods to produce multiple targeted information products from such a resource. For many users of technical, commercial, and policy information, the information landscape is cluttered and confusing. The Internet now contains a wide variety of newsletters, trade association sites, blogs, and other media reports, in addition to scholarly publications, consulting reports, white papers from policy organizations, and government sites. The solution to this problem is not more sites, but a new standard for curated knowledge resources to reduce the clutter. Garbrook proposes to build technology to automatically segment curated matter to establish a comprehensive resource into targeted knowledge products suitable for various sectors of the community. Combining its computational technology and its ability to train agent curators, Garbrook is positioned to build additional knowledge products in the future for topics related to energy and the environment.


ExRo has developed a fundamentally different generator design that is expected to have more linear operating characteristics, thereby increasing the aggregate energy output from renewables. Conventional electrical generators must be designed to the maximum expected input energy and output load, leading to inefficiencies when energy input or loads are lower or higher. Most renewable energy sources (wind, tidal, small hydro) tend to be highly variable. The key patents of the company were recently approved.


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