The Energy Storage Report 2024

Now available to download, covering deployments, technology, policy and finance in the energy storage market

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


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.

This article requires Premium SubscriptionBasic (FREE) Subscription

Enjoy 12 months of exclusive analysis

  • Regular insight and analysis of the industry’s biggest developments
  • In-depth interviews with the industry’s leading figures
  • Annual digital subscription to the PV Tech Power journal
  • Discounts on Solar Media’s portfolio of events, in-person and virtual

Or continue reading this article for free

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

“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, 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

June 11, 2024
Editor Andy Colthorpe speaks with Yann Brandt, chief commercial officer at FlexGen, a solar industry veteran who saw the rising potential of the energy storage industry and jumped on board.
June 5, 2024
Invinity Energy Systems, a technology company that develops vanadium redox flow batteries (VRFB), plans to expand its manufacturing footprint in Scotland, UK.
May 31, 2024
Editor Andy Colthorpe speaks with Long Duration Energy Storage Council director of markets and technology Gabriel Murtagh.
May 30, 2024
The European Council has formally adopted the EU’s support package for its clean energy manufacturing industry, the Net-Zero Industry Act (NZIA), amidst mixed fortunes for local battery gigafactory projects.
May 29, 2024
Some of the current market prices for lithium-ion batteries are below cost and will not last forever but Europe still needs to be more cost-competitive, the CEO of one of Europe’s first large-scale manufacturing facilities told

Most Popular

Email Newsletter