FlexGen and Hithium in 25GWh two-way agreement for battery supply and EMS

November 22, 2023
LinkedIn
Twitter
Reddit
Facebook
Email

Battery storage system integrator FlexGen and battery manufacturer Hithium could be supplying each other with complementary technologies for large-scale battery energy storage system (BESS) projects.

The pair yesterday (21 November) announced the signing of a cooperation agreement in which they set purchasing targets over the next three years.

FlexGen would buy up to 10GWh of Hithium battery capacity in that time, while the Chinese manufacturer would use FlexGen’s energy management system (EMS) in a combined 15GWh of projects. In each instance, the capacity of each other’s hardware or software to be used could include direct purchases, or indirect through customers’ projects.

The cooperation agreement is therefore “bidirectional,” FlexGen chief commercial officer Yann Brandt told Energy-Storage.news.

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

“We’re going to support them as they venture out to try to get 10GWh focused in the Americas. So it’s not a master supply agreement (MSA), we’re not buying the product, but we’re helping them get into the market share,” Brandt said.

In return, Hithium can help FlexGen expand its footprint, which is currently almost entirely US-based, further afield.

“They have a great product, so it makes sense, but also they are helping us. We’re getting close into systematising our EMS into their solutions for 15GWh on a global basis,” Brandt said.

Hithium was only founded in 2019, but has already supplied around 11GWh of battery products worldwide. One of the few major Chinese manufacturers to focus on the BESS market, the company shipped 5GWh in its home country in 2022, and is currently ramping up annual production capacity to 70GWh by the end of this year, targeting 135GWh of production capacity in total by 2025.    

In late 2022, a 200MW/400MWh standalone BESS project in Ningxia, China, came online using the company’s cells and claimed to be the largest project of its type in the country.

Half a year later in June 2023, Hithium launched a European base, shortly before closing financing worth US$620 million. Its forays into the US market officially began earlier this month through a 1GWh supply deal with developer Perfect Power.

The manufacturer’s products include a 3.44MWh containerised BESS solution featuring its 280Ah lithium iron phosphate (LFP) cell, while it is also bringing to the market a 5MWh container using a new 314Ah prismatic LFP cell that it claimed has a 12,000 cycle lifetime.

FlexGen meanwhile is a heavily software-focused integrator with a large portfolio of assets in Texas’ booming ERCOT market. The company has long claimed the software piece, and in particular its HybridOS operating system software and controls as well as its EMS, are its key differentiators.

In a feature interview with Energy-Storage.news, published last month, CCO Yann Brandt talked about FlexGen’s ambition to be “the Microsoft Windows operating system of energy storage,” with battery storage systems around the world running on its platform.

Read Next

February 10, 2026
Energy storage developer and system integrator Energy Vault and sodium-ion battery energy storage system (BESS) startup Peak Energy have announced a 1.5GWh strategic development agreement.
February 10, 2026
Chinese-based OEM Sungrow will build a PV inverter and battery storage manufacturing facility in southwest Poland, its first outside Asia.
February 10, 2026
Carrie Xiao examines some notable recent partnerships and supply agreements for Chinese energy storage players in the Middle East, Europe, Africa and Australia.
February 9, 2026
Software-focused battery energy storage system (BESS) integrator FlexGen has put two utility-scale BESS projects in operation in Wisconsin and Iowa, US, totalling 700MWh.
January 15, 2026
San Diego-based home battery storage company NeoVolta has formed NeoVolta Power, a joint venture (JV) to develop a US battery energy storage system (BESS) manufacturing platform in Pendergrass, Georgia.