Iron electrolyte flow battery player ESS Inc expands into Europe

LinkedIn
Twitter
Reddit
Facebook
Email

NYSE-listed iron flow battery group ESS Inc is expanding into Europe with its first deployments on the continent later this year and local manufacturing capability expected by 2024/25.

The company is scheduled to book its first revenues in the US in the current quarter and will begin European deployment of its long-duration batteries during the second half of 2022.

Its iron flow batteries provide 4-12 hours of duration and claim unlimited cycles with no capacity loss, versus Li-ion’s average of 6,000.

It says its product is made using earth-abundant materials like iron, salt and water making it safe, low-cost and sustainable. It concedes that lithium-ion has a lower capital cost per kWh but claims parity at 4 hours with iron flow winning thereafter.

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

Its has two main products: the 400kWh Energy Warehouse for commercial and industrial (C&I) customers and the Energy Center for utility-scale applications which provides 6MW/74MWh per acre footprint. It expects to ship 40-50 Energy Warehouses this year but has not guided on Energy Center orders.

ESS Inc expects to start manufacturing its Warehouse and Center products on the European continent in 2024, according to a company presentation, with Power Module manufacturing arriving on the continent the following year.

Long-term customers include Softbank’s clean energy arm SB Energy, Enel Green Power España and Chilean utility Edalaysen.

The company says the European region will need a whopping 30 TWh of long-duration energy storage to make its grid net-zero by 2040, citing the Long Duration Energy Storage (LDES) Council which published a report finding that 85-130GWh will be needed globally. The LDES Council has some 30 technology members providing a range of technologies for long duration including iron flow, gravity-based and green hydrogen solutions.

As part of ESS Inc’s expansion into Europe it recently appointed Alan Greenshields as Director of Europe to oversee adoption and deployment of its solutions. Energy-storage.news recently interviewed him along with the CEO and CCO of competing long-duration battery storage group Invinity Energy Systems.

In it, Greenshields highlighted the commercial & industrial (C&I) sector and colocation with solar or wind as ideal use cases for its product, though claimed it was getting interest from all corners of the market.

8 September 2026
Barcelona, Spain
Battery & Energy Storage Tech Europe (BESTE) is Europe’s industrial scaling platform for stationary and industrial battery applications — not EVs. Taking place 8–9 September 2026 at Fira de Barcelona, BESTE brings together utilities, IPPs, energy-intensive industries, data centres, ports, rail, maritime, defence and aerospace OEMs — all deploying or integrating battery storage at scale. Over 100 companies already confirmed — including EDP Renewables, Acciona, Endesa, Naturgy, Neoen, Galp, Basquevolt and Veolia — alongside 40+ expert speakers and international institutional support from BEPA, BVES, LDES and Volta Foundation. Where Europe’s battery & ES ecosystem turns projects into reality.
15 September 2026
San Diego, USA
You can expect to meet and network with all the key industry players again in 2025 from major US asset owners, operators, RTOs and ISOs, optimizers, software and analytics providers, technical consultancies, O&M technology providers and more.

Read Next

June 24, 2026
Market research firm Wood Mackenzie predicted that the US energy storage market will almost quadruple over the next six years.
June 24, 2026
NatPower and Tesla have signed a multi-year supply and execution agreement covering more than 25GWh of BESS across Italy and the UK.
June 24, 2026
Germany’s policymakers, regulators and energy storage industry must carefully consider the issues of grid connections and grid fees, writes Thomas Antonioli of developer Terra One.
June 23, 2026
Renewables developer rPlus Energies has announced start of commercial operations for the 400MW/1,600MWh Green River Energy Centre in Emery County, Utah, US.
Premium
June 23, 2026
ZincFive, a manufacturer of nickel-zinc battery systems for data centre and AI infrastructure applications, announced on 11 June that it will become publicly traded through a merger with special purpose acquisition company (SPAC) Spark I Acquisition Corporation.