Energy trader Vitol leads US$100 million funding round for BESS system integrator FlexGen

July 20, 2022
LinkedIn
Twitter
Reddit
Facebook
Email

US energy storage system integration services and software company FlexGen has raised US$100 million in a Series C funding round.

The company said yesterday that the investment will enable it to make progress on its pipeline of large-scale battery energy storage system (BESS) projects for customers across multiple regions. A representative said it leaves FlexGen “well positioned to execute on its large pipeline”.

The round was led by Netherlands-headquartered commodities and energy trading group Vitol which reported US$279 billion annual revenues in 2021 and trades around 7.6 billion barrels of crude oil and products daily. Vitol has also committed US$1.3 billion to global renewable energy projects.

“We will not reach our carbon reduction targets without energy storage, which addresses the intermittency of renewables generation and helps to create a more stable grid for the future,” Vitol’s head of renewables R. Andrew Pass said, describing FlexGen as “the leader in energy storage solutions”.

This article requires Premium SubscriptionBasic (FREE) Subscription

Try Premium for just $1

  • Full premium access for the first month at only $1
  • Converts to an annual rate after 30 days unless cancelled
  • Cancel anytime during the trial period

Premium Benefits

  • Expert industry analysis and interviews
  • Digital access to PV Tech Power journal
  • Exclusive event discounts

Or get the full Premium subscription right away

Or continue reading this article for free

The energy trader will support international expansion for FlexGen through the Dutch company’s global footprint, Pass said, while Vitol will also provide energy storage optimisation services to FlexGen’s customers which include utilities, independent power producers (IPPs) and cooperatives.  

Also joining the round were some of FlexGen’s existing investors.

It comes less than a year after a Series B funding round which raised US$150 million equity investment from alternative asset management group Apollo Global Management.

Incidentally, in 2021, Apollo-affiliated investors also bought a 50% stake in Broad Reach Power, a clean energy independent power producer (IPP) which is developing large-scale BESS projects in regions including Texas and California, where FlexGen is also active.

FlexGen to date has installed more than 3GWh of energy storage since its founding in 2009, when in its early years it was largely focused on microgrids in remote regions for customers including US military forces.

Today, its pivot towards grid-connected large-scale battery storage has led it to contracts for recent projects that include a 2.1GWh BESS portfolio for California investor-owned utility (IOU) Southern California Edison (SCE) and a deal to put 10 BESS assets totalling 40MW at substation sites for a group of North Carolina electric cooperatives.

The company has always emphasised that its technologies, including its Hybrid OS software controls platform are a key differentiator, having been developed over more than a decade. It has enabled diversification into developing digital twins for BESS project design evaluation and the launch of an integrated electric vehicle (EV) charger offering including battery storage and energy management system (EMS) equipment, for example.

The investment also follows the news just a few days ago that rival system integrator Powin Energy has raised US$135 million from its two existing shareholders and Singapore sovereign wealth fund GIC.

Read Next

December 12, 2025
The energy storage industry is emerging as a high-growth and high-profile sector in the Hong Kong capital market. Over 2025, a number of Chinese energy storage companies, including Sungrow, Hithium, Envision AESC and Sigenergy have submitted plans for a Hong Kong listing, with Guoxia Technology about to complete its listing.
December 11, 2025
Two major Middle East and North Africa (MENA) region projects combining solar PV and battery storage have progressed in Saudi Arabia and Egypt through ACWA Power and Scatec, respectively.
December 5, 2025
Project to integrate electric vehicle fast-chargers into ancillary services markets could be widely replicated, according to ADS-TEC Energy.
December 3, 2025
Energy-Storage.news proudly presents our sponsored webinar with Trina Storage, ‘Powering Certainty: Bankable Energy Storage, with Elementa 2 Pro’.
December 2, 2025
Manoa Energy and HD Renewable Energy Japan have begun commercial operation of a 50MW/104MWh battery storage project in Hokkaido, Japan.