Madrid, Spain – September 5, 2025 — HiTHIUM, a leading global company in long-duration energy storage technology, today announced it has signed a supply agreement (MSA) with Bertel O. Steen Power Solutions (BOS Power) to deliver 3GWh of battery energy storage systems (BESS) for projects across Denmark, Sweden, Finland, and Norway through 2027.

The agreement covers a pipeline of utility-scale projects ranging from 30MWh and up. HiTHIUM will supply its portfolio of DC blocks, including the ∞Power 6.25MWh 2h/4h BESS and ∞Block 5MWh BESS.

As part of the collaboration, HiTHIUM will provide technical training to BOS Power and authorize the company as a certified service provider, ensuring localized support and enhanced operational efficiency for end customers. Strategically positioned to support clients with projects, BOS Power leverages strong investor relationships rooted in its core business areas to deliver scalable energy solutions across market segments.

Innovations in Long Duration Energy Storage and Sodium-ion Battery Technologies

HiTHIUM continues to lead the industry with its ongoing innovations, including long-duration energy storage (LDES) solutions like the ∞Power 6.25MWh 4h BESS and sodium-ion battery technologies such as the ∞Cell N162Ah. The company's dedicated R&D efforts have resulted in breakthrough products designed to meet the growing demand for extended storage durations, enhanced safety, and cost-effectiveness in the renewable energy sector. Notably, HiTHIUM has recently achieved mass production and delivery of its next-generation ∞Cell 1175Ah and 587Ah, setting new industry benchmarks for energy density, cycle life, and reliability in large-scale storage applications.

With several pilot projects already deployed across multiple regions, HiTHIUM's long-duration BESS have demonstrated superior performance in grid stabilization, peak shaving, and renewable integration. These innovations have garnered significant market recognition, positioning HiTHIUM as a trusted partner for global projects worldwide.

 HiTHIUM’s First Project in Denmark

The first project under the agreement is already under construction in Denmark, marking HiTHIUM’s entry into the Nordic market.

“Partnering with BOS Power strengthens our presence in Northern Europe and supports the region’s transition to a more flexible and renewable grid,” said HiTHIUM’s Kelson Li, Senior Director of Sales, DACH, Northern & Eastern Europe. “By combing our advanced energy storage technology with BOS Power 's expertise in large-scale energy storage and renewable integration, we are not only addressing the growing demand for local renewable energy supply and supporting the green transition – we are also shaping the future of energy innovation.”

From BOS Power’s perspective, the collaboration marks a key step forward: “This agreement highlights our commitment to delivering large-scale, high-quality energy storage systems across Northern Europe,” says Kim Strate Kiegstad, Head of Energy Storage at BOS Power. “With HiTHIUM’s advanced technology and our proven expertise in full EPC turnkey project execution and local integration, we are well placed to support customers in building reliable, flexible and sustainable energy infrastructure for the future.”

Strengthening Global Reach

This strategic collaboration underscores HiTHIUM’s continued commitment to advancing the global energy transition through targeted local collaborations and a rapidly expanding on-the-ground presence. By joining forces with industry leaders like BOS Power, HiTHIUM reinforces its ability to deliver innovative energy solutions and strong customer support worldwide.

Founded in 2019, HiTHIUM has rapidly established itself as a leader in the energy storage industry through its core strengths in innovation, service, safety, and global operations. Since beginning shipments at the end of 2021, the company has leveraged these strengths to build a powerful competitive advantage. Having surpassed 100GWh in cumulative shipments, HiTHIUM has climbed the global rankings—from fifth in 2023 to third in 2024, and to the Top 2 in the first half of 2025—setting a benchmark for high-quality growth in energy storage.

About BOS Power

BOS Power is a leading Nordic provider of Energy Storage Systems (ESS), emergency power and marine propulsion solutions. As a turnkey EPC partner, we deliver complete projects from design and engineering to commissioning, service and lifecycle optimization.

With a strong Nordic footprint of offices, workshops, service hubs and storage facilities, we provide rapid support and reliable performance close to our customers. Our solutions serve critical infrastructure such as energy networks, data centers, hospitals, telecommunications and commercial marine, where reliability, flexibility and sustainability are essential.

As part of the Bertel O. Steen Group, BOS Power combines financial strength with proven experience to accelerate the transition to a sustainable and secure energy future.