SK Innovation forms North America battery supply partnership with ESS provider IHI Terrasun

July 5, 2021
LinkedIn
Twitter
Reddit
Facebook
Email
SK Innovation electric vehicle battery factory in Hungary, Europe. Image: SK Innovation.

SK Innovation has established a partnership with US energy storage system integration solutions and services company IHI Terrasun Solutions that could see the South Korean manufacturer’s lithium-ion batteries used in Terrasun projects from 2022.

SK Innovation made its first commercial lithium batteries in 1996 and is currently constructing two battery gigafactories in the US state of Georgia with over 20GWh of annual production capacity. Parent company SK Group is involved in various industries from energy to chemicals and the company is investing around US$10 billion in the US, including US$1.67 billion investment in Georgia, to add to US$8 billion of existing assets in the country. Once the Georgia plants are up and running SKI will have about 71GWh of annual production capacity worldwide.

IHI Terrasun meanwhile was previously known as IHI Energy Storage and is the Chicago-headquartered US energy storage subsidiary of Japan’s IHI Corporation, a heavy industry manufacturer. Terrasun became incorporated as a standalone company and changed to its current name in August 2020. In total, more than 450MWh of battery storage has been installed, is contracted for, or is under construction by the company to date including as IHI Energy Storage.

Its project track record and ongoing work includes more than 60MWh of projects in Ontario, Canada, completed in 2018 for developers NRStor and Convergent Energy + Power, a 51MWh systems equipment supply deal with developer Nexamp for battery storage sites in New York and Massachusetts announced in 2019 and more than 150MWh of project work with Borrego Solar in Massachusetts, a milestone the two companies announced as having been reached at the beginning of this year.

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

Terrasun and SK Innovation signed a Memorandum of Understanding (MoU) at the beginning of this month, which Terrasun said “indicates” that it will integrate SKI’s batteries into its battery portfolio, supporting projects in Terrasun’s pipeline for 2022 and beyond, which the company claimed is “extensive”. Terrasun said it has a technology agnostic approach to battery equipment selection and integrates batteries from multiple top-tier providers into its systems.

“This partnership leverages advanced battery technology manufactured at SKI’s new manufacturing facility in Georgia, USA and we are proud to support US manufacturing and commitment to clean energy,” IHI Terrasun president Jamal Burki said.

The partnership aims to largely target the North American solar-plus-storage market, Terrasun said in a press release. SK Innovation’s battery production ambitions in the US had at one point hinged on the outcome of a legal dispute with fellow South Korean manufacturer LG Energy Solution which began in 2019, but resolved their differences in April, leaving both set for “amicable competition” for market share.

24 March 2026
Dallas, Texas
The Energy Storage Summit USA is the only place where you are guaranteed to meet all the most important investors, developers, IPPs, RTOs and ISOs, policymakers, utilities, energy buyers, service providers, consultancies and technology providers in one room, to ensure that your deals get done as efficiently as possible. Book your ticket today to join us in 2026!
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

March 3, 2026
Oregon-based utility company Portland General Electric has finalised agreements for more than 1,000MW of new renewable energy and BESS projects.
March 3, 2026
The Governing Board of the Puerto Rico Electric Power Authority (PREPA) has approved renewables developer Polaris Renewable Energy’s battery energy storage system (BESS) standard offer (SO1) agreement.
Premium
March 3, 2026
Speaking to ESN Premium, Tom Best and Rachel Rundle of Eku Energy explore some of the key policies and drivers of Australia’s ESS market.
March 2, 2026
Zinc hybrid cathode battery and storage system maker Eos Energy reasserted its vision for 2026 and beyond in its Q4 and full-year 2025 financial results.
February 26, 2026
Energy storage developer and subsidiary of Canadian Solar, Recurrent Energy, has sold its 200MWh Fort Duncan battery energy storage system (BESS) project, located in Texas, US, to developer Hunt Energy Network.