From June 23 to 25, HiTHIUM presented its latest energy storage innovations at The Smarter E Europe 2026, showcasing a comprehensive portfolio that included the world's first native 8-hour long-duration energy storage (LDES) system, the ∞Power 6.9MWh battery energy storage system (BESS), the newly introduced ∞Power 1022kWh liquid-cooled commercial and industrial (C&I) energy storage cabinet, and the ARKVOLT residential energy storage product range. Collectively, these solutions highlighted HiTHIUM's capability to deliver integrated energy storage applications across source-grid-load scenarios spanning one to eight hours.

As Europe accelerates its transition to renewable energy, the rapid expansion of wind and solar capacity is increasing the demand for flexible power system resources. Growing instances of negative electricity pricing, heightened grid-balancing challenges, and rising renewable energy consumption requirements are shifting the energy storage market beyond short-duration applications toward long-duration energy storage, positioning LDES as a critical component of high-renewable power systems.

To meet evolving expectations around cost efficiency, safety, reliability, and scalability, HiTHIUM has developed a vertically integrated technology framework encompassing dedicated battery cells through to complete system integration. A key highlight at the exhibition was the ∞Power 6.9MWh 8-hour BESS. Built around the world's first 1300Ah battery cell specifically designed for 8-hour LDES applications, the system delivers over 6.9MWh of storage capacity and provides a stable eight-hour output within a standard 20-foot container.

Featuring a design lifespan of up to 25 years and flexible deployment options, the solution helps reduce both land requirements and construction costs. Environmental sustainability is supported through the use of low-global-warming-potential coolants, leak-prevention technologies, and recyclable structural materials, while a layered safety architecture combines intrinsic cell safety, compartment-level protection, and advanced battery management systems.

HiTHIUM also unveiled the ∞Power 1022kWh liquid-cooled C&I energy storage cabinet for international commercial and industrial markets. Incorporating the company's proprietary ∞Cell 1175Ah high-capacity battery cell and a 1P272S system architecture, each cabinet offers a nominal storage capacity of 1022.72kWh, supports a 0.25P charge-discharge rate, and maintains system DC voltage below 1000V. By leveraging large-format cells, high system integration, liquid cooling technology, and intelligent energy management, the solution enhances integration efficiency, optimizes land use, simplifies installation, and improves lifecycle economics.

Compared with conventional multi-cabinet parallel systems, the new cabinet can reduce installation footprint by approximately 32% while achieving an energy density of about 300kWh per square meter. Designed for global deployment, it incorporates environmentally friendly refrigerants, operates across a wide temperature range, and features IP55 protection along with C5M anti-corrosion standards.

The event also marked the European introduction of HiTHIUM's residential energy storage business and the worldwide launch of its premium residential brand, ARKVOLT. The ARKVOLT lineup comprises three product series: R30, F8S, and L16/L16S. Utilizing HiTHIUM's proprietary ∞Cell 587Ah high-capacity battery technology, the R30 series delivers enhanced energy density, system efficiency, and lower lifecycle costs for large residential and light commercial applications.

The F8S range is designed for premium whole-home backup solutions, while the L16/L16S series emphasizes flexibility, scalability, and strong economic returns across residential and light commercial scenarios. The global launch of ARKVOLT represents a strategic expansion of HiTHIUM's end-user energy services business, supporting its evolution from global product deployment to global brand development while strengthening its residential energy storage ecosystem.

During the exhibition, HiTHIUM also entered into strategic partnerships with several European companies, including Turbo Energy, S.A., to advance local deployment of long-duration energy storage solutions integrated with AI-powered energy management systems and commercial and industrial applications. At the same time, HiTHIUM's ∞Power 6.25MWh 4-hour LDES BESS demonstrated exceptional performance during large-scale fire testing, securing certification from UL Solutions and successfully completing assessments by TÜV Rheinland. The system subsequently achieved both UL 9540 and IEC 62933-5-2 certifications, reinforcing HiTHIUM's leadership in large-format battery technology and system safety while providing a strong foundation for large-scale global deployment.

As renewable energy penetration continues to rise worldwide, long-duration energy storage is rapidly moving toward widespread commercial adoption. HiTHIUM remains committed to advancing LDES technologies, driving innovation, and expanding its global footprint through a comprehensive portfolio of battery cells, energy storage systems, and full-scenario applications to support customers worldwide and accelerate the transition to sustainable energy.

Get an Inside Look at EV Testing Facilities Date November 7, 2023 | 12:00 PM EST

Join us for an exclusive behind-the-scenes tour of UL Solutions and Keysight’s electric vehicle (EV) labs. Discover the technology that powers high-power charging, batteries, and the potential of EVs to fuel the grid.

Don’t miss this opportunity to have your queries addressed during a live Q&A session with EV specialists. Secure your spot today! Understanding Power Transfer from the Grid to EVs and Vice Versa EV Charging Gain insights into the protocols, specifications, safety measures, and best practices for both AC and DC EV charging. Delve into the world of AC and DC EV charging, understanding the crucial details for safe and efficient charging of your electric vehicle. Vehicle to Grid (V2G) Get to know about the ecosystem that allows EVs to return power to the grid. EV Standards Take a virtual tour of the EV lab at UL Solutions, where engineers work on developing standards and testing for compliance.
 
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Speakers include Daniel Bogdanoff Test Enthusiast and Marketing Engineer Daniel Bogdanoff is a test enthusiast and marketing engineer at Keysight, known for his videos on the Keysight Labs YouTube channel.

He has contributed articles to several publications, including NASA Tech Briefs, All About Circuits, and Hackaday. He holds a Bachelor of Science in electrical engineering from Texas A&M University.

You can follow him on Twitter @DanielBogdanoff.

Timothy Zgonena Principal Engineer, UL LLC Since 1990, Timothy Zgonena has been the principal engineer for Distributed Energy Resources Equipment and Systems at Underwriters Laboratories (UL), Inc. His role involves developing, maintaining, and applying certification requirements and UL conformity assessment services for various energy systems. He is a member of several IEEE, NFPA, and IEC Working Groups related to photovoltaic (PV) and distributed general equipment.

Robert Krull Associate Engineer Robert Krull is an associate engineer at Underwriters Laboratories, Inc., contributing to the development of the EV testing lab. He has project management experience in EV charger compliance for UL / IEC / PSE Denan certifications and trains engineers and technicians in UL / IEC CB / PSE Denan test flows. He holds an electrical engineering technology degree from Purdue University.

Eric Matzke Manager, Engineering Eric Matzke is the manager of the electric vehicle charging division at Underwriters Laboratories, Inc. (UL). Leading a team of skilled test and compliance engineers, Eric heads UL’s dynamic electric vehicle charging group in North America. He has extensive experience in project oversight and ensuring compliance with rules and regulations from various standards organizations, including ISO, IEC, ASTM, AAMI, UL, and FDA.

James Arnold Technical Marketing Engineer James Arnold is a technical marketing engineer specializing in high-power test solutions at Keysight’s Automotive and Energy Solutions Group. He holds a Bachelor of Science in Electrical Engineering from the University of Illinois at Urbana-Champaign. James is based at Keysight’s Novi, Michigan, Automotive Customer Center.