Business
12 MWh Sale for U.S. Project
Invinity Energy Systems plc has announced the sale of a 12 MWh Endurium battery system to Pacific Northwest National Laboratory (PNNL) for deployment at their Richland, Washington campus, with delivery expected in the second half of 2026. This sale, supported by U.S. Department of Energy funds, aims to demonstrate the durability and flexibility of Invinity's vanadium flow batteries in supporting a reliable electrical grid, aligning with the increasing U.S. market focus on longer-duration energy storage solutions. Disclaimer*
About this update from Invinity Energy Systems Plc
[{"type":"text","content":"\n\nThe information contained within this Announcement is deemed by Invinity Energy Systems plc to constitute inside information as stipulated under the Market Abuse Regulation (EU) No. 596/2014 as it forms part of UK law by virtue of the European Union (Withdrawal) Act 2018 (\"MAR\").\n \n\n \n22 December 2025\nInvinity Energy Systems plc\n \n(\"Invinity\" or the \"Company\")\n \n12 MWh Sale for U.S. Project\nEndurium battery system to be deployed at PNNL's Richland, Washington campus\n \nInvinity Energy Systems plc (AIM: IES) (OTCQX: IESVF), a leading global manufacturer of utility-grade energy storage, is pleased to announce the sale of a 12 MWh Endurium battery system to Pacific Northwest National Laboratory (\"PNNL\").\n \nThe batteries will be installed at PNNL's Richland, Washington campus and used to demonstrate the ability of advanced energy storage in general, and Invinity's vanadium flow batteries (\"VFBs\") in particular, to deliver the durable, flexible services needed for a future low-cost, high-reliability electrical grid. In proving their ability to provide 24-hour energy discharge, improve operational resilience and decrease peak site energy demand, Invinity's VFBs are expected to further deliver significant benefits to PNNL.\n \nThis sale follows the recent inauguration visit by U.S. Energy Secretary Chris Wright to PNNL's Grid Storage Launchpad, where he initiated the testing of an Invinity battery. This comes at a time when energy storage continues to gain prominence within the U.S. power market as grid operators begin to prioritise storage duration over short-term capacity. For example, PJM, the largest grid operator in the U.S., is elevating the priority of eight- and ten-hour duration systems as it looks to support new resources that can balance load and deliver energy when its system is potentially at risk.\n \nAs previously announced by the Company in September 2023, this project is supported by funds from the U.S. Department of Energy which were made available to a number of U.S. projects which plan to feature Invinity's technology. Delivery of the Invinity batteries is expected in H2 2026.\n \nMatt Harper, President at Invinity said:\n \n\"From its very beginnings, PNNL has been one of the most innovative laboratories in energy, pioneering the technolog...