5 February 2026

Invinity Energy Systems plc

("Invinity" or the "Company")

Invinity Enhances U.S. Commercial Presence

Senior business development appointment builds upon strong commercial traction to further support Invinity's U.S. market strategy

Invinity Energy Systems plc (AIM: IES), a leading global manufacturer of utility-grade energy storage, is pleased to announce the enhancement of its global Business Development team with the appointment of Shane McBee to the role of Vice President, Business Development.

Shane brings significant experience to Invinity, gained through a 30+ year career which has included senior business development positions in the energy storage, chemical and engineering industries. He joins Invinity from U.S. energy storage business, Eos Energy Enterprises Inc., where he was Vice President, Strategic Corporate Accounts. Shane holds a Bachelor of Science in Chemistry and Biochemical Engineering from The Citadel, the Military College of South Carolina, as well as an MBA from the University of Miami.

Based in Atlanta, Georgia, Shane enhances Invinity's global business development team with a primary focus on rapidly advancing the Company's commercial opportunities in the U.S. as well as globally. This senior hire represents a further advancement of Invinity's capabilities in the U.S., positioning the Company to capitalise on one of the world's largest and fastest growing markets for energy storage.

Invinity continues to gain commercial traction within the U.S., driven by a growing number of operating projects across the country. Most recently, in late December 2025, Invinity announced a 12 MWh order from Pacific Northwest National Labs ("PNNL") which followed a visit from U.S. Energy Secretary Chris Wright, who operated an existing Invinity battery system installed at PNNL's Grid Storage Launchpad facility. The Company also announced the successful commissioning of a number of key U.S. projects including the 10 MWh vanadium flow battery system at the Viejas Resort and Casino and the 4 MWh system for EDF Renewables North America subsidiary, Powerflex, both in Southern California.

Invinity remains on track to establish a U.S. manufacturing facility later this year to complement its existing service facility in Vista, California. This U.S. manufacturing capability is being implemented in part to meet the domestic content and sourcing requirements required by customers who purchase Endurium for U.S. projects expecting to qualify for the enhanced Investment Tax Credit ("ITC"), while also allowing Invinity to benefit from manufacturing Production Tax Credits ("PTC"). Together, these benefits mean projects using Endurium can access materially improved project economics through higher after-tax returns, while our manufacturing operations benefit from predictable, long-term support for domestic clean-energy supply chains. Importantly, the facility is expected to be fully compliant with Foreign Entity of Concern ("FEOC") rules, giving customers, financiers and partners confidence that projects are insulated from regulatory risk and future policy tightening. Together, this delivers lower cost of ownership for customers, stronger bankability for projects, and a scalable, compliant platform for long-duration energy storage deployment across the U.S. market.

Further information on Invinity's activities in the U.S. can be found on the Company's website.

Shane McBee, Vice President, Business Development at Invinity said:

"I am incredibly excited to join the Invinity team at this pivotal moment for the energy storage industry. Across the U.S., utilities, regulators and developers are moving quickly to secure reliable, high-throughput energy storage that can scale to support the rapid load growth seen particularly within the datacentre segment. The market is increasingly seeking an annuity versus a disposable asset - prioritizing proven technologies that deliver predictable performance and a 30+ year asset life without thermal runaway risk.

"I joined Invinity because I believe we are uniquely positioned to provide the mission-critical power infrastructure that not only hyperscalers, but the U.S. market as a whole require as we move into the next stage of the Age of Electrification"

Matt Harper, President at Invinity said:

"We're absolutely thrilled to welcome Shane to Invinity. His deep sector expertise and long track record in one of the world's fastest‑growing energy storage markets make him an exceptional addition to our team. The U.S. market represents a major growth trajectory for the Company, and Shane's leadership gives us a powerful platform to build on the strong network of projects and partners we've already established. As we move toward launching U.S. manufacturing, his arrival further strengthens the foundation for the next stage of Invinity's expansion."

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Notes to Editors

Invinity Energy Systems plc (AIM: IES) manufactures vanadium flow batteries for large-scale, high-throughput energy storage requirements of business, industry and electrical networks.

Invinity's factory-built flow batteries run continually with no degradation for over 30 years, making them suitable for the most demanding applications in renewable energy production. Energy storage systems based on Invinity's batteries are safe, reliable, and economical, and range in size from 1 to hundreds of megawatt-hours.

Invinity was created in April 2020 through the merger of two flow battery industry leaders: redT energy plc and Avalon Battery Corporation. With more than 190 MWh of systems deployed, contracted for delivery or awarded for projects across more than 90 sites in 17 countries, Invinity is active in all major global energy storage markets and has operations in the UK, Canada, USA and China. Invinity Energy Systems plc is quoted in the UK on AIM.

To find out more, visit invinity.com, sign up to our monthly Investor Newsletter here or contact Investor Relations on via +44 (0)20 4551 0361 or [email protected].

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