Data Centre Build News & Insights

€50bn Croatia AI data centre investment announced

Pantheon Atlas, a transatlantic-led investment group, has announced plans to develop a hyperscale AI data centre and innovation campus in Topusko, Croatia, with total investment expected to exceed €50 billion (£43 billion). This is reportedly the largest investment of its kind in Croatian history and among the largest private US investments in Europe. The project, known as Pantheon AI, is intended to address growing demand for AI-driven data centre capacity across Europe, where availability of power, land, and construction resources remains constrained. The development is being delivered by a transatlantic investment group combining US capital with local expertise in Croatia, including regulatory and grid access experience. The announcement was made at the Three Seas Initiative Summit in Dubrovnik. Pantheon AI is designed to meet NVIDIA’s gigawatt-scale AI factory standards and is expected to offer high levels of availability, exceeding Tier IV benchmarks. Jako Andabak, Founding Partner at Pantheon AI, comments, "Pantheon AI is a signal to the world that Croatia is open for the highest-caliber investment. "This project is the culmination of years of work to bring world-class digital infrastructure to Croatia." Addressing European data centre capacity Across Europe, established data centre markets are operating with limited vacancy, while grid connection delays continue to affect new developments. Demand in Central and Eastern Europe is expected to increase significantly by 2035, particularly as AI workloads expand and regulatory requirements encourage data to be stored within EU borders. Ryan Rich, Managing Partner at Pantheon AI, explains, "We have assembled a transatlantic partnership to solve one of the most pressing challenges in global digital infrastructure: enabling hyperscale operators to meet AI-driven demand at scale." The project is expected to support up to 5.2 GW of renewable energy integration into Croatia’s grid. It will include an on-site solar installation and battery storage, alongside multiple fibre connections across European network corridors. Joshua Volz, Special Envoy for Global Energy Integration at the US Department of Energy, says, "Critical infrastructure of this scale, built by the private sector responding to real market demand, is exactly how US interests and European security advance together." Construction of the campus is scheduled to begin in early 2027, with operations expected to start in the first quarter of 2029. The initial phase represents a €12 billion (£10 billion) investment, with additional funding anticipated as tenants deploy infrastructure. The campus will have a planned capacity of 1GW, including 800MW of usable IT load, and will span approximately 310 acres (1.2 km²), with expansion potential. The development is expected to create around 1,500 permanent roles, alongside 3,000 jobs during construction.

Data centres 2026: Energy efficiency and sustainability

Prospero Events Group says it is proud to present the 3rd Energy Efficiency & Sustainability in Data Centers 2026 conference, taking place on 26–27 May 2026 in Amsterdam, the Netherlands. The event will bring together senior decision-makers, technology innovators, and sustainability leaders to explore how data centres can become more energy efficient, resilient, and environmentally responsible. Event presentation topics and speaker panel As AI adoption, hyperscale growth, and electrification continue to increase power demand, the conference will focus on the strategies needed to balance performance with sustainability. Key discussion areas include: • Renewable energy integration• Cooling efficiency and uptime• Waste heat reuse and district heating• On-site energy generation and energy resilience• ESG integration across the data centre lifecycle• Grid constraints and power availability• AI-driven optimisation and future-ready infrastructure The conference will feature expert insights from leading organisations, including: • Günter Eggers, Director Public, NTT Global Data Centers• Vladimir Prodanovic, Principal Program Manager, NVIDIA• Pedro Filipe Barreiros, Data Center Operations, Google• Stijn Grove, Managing Director, Dutch Data Center Association• Martijn Van Wijngaarden, Global Energy Transaction Manager, Iron Mountain• Simon Muskett and Olalekan Salami, Digital Realty The event offers a valuable platform for collaboration amongst operators, investors, technology providers, and sustainability experts committed to building the next generation of low-impact, high-performance data centres. Explore the complete speaker lineup, session topics, and key discussion points shaping the future of sustainable data centres. To register and download the event agenda, click here.

Veolia, Amazon develop data centre water reuse system

Veolia, a French multinational environmental services company, is working with US technology and e-commerce company Amazon to introduce reclaimed water for cooling at a data centre in Mississippi, USA, as part of efforts to reduce water use and support long-term water resilience. The facility, expected to be operational in 2027, will be the first Amazon data centre in the state to use treated wastewater for cooling processes. The system will convert effluent from nearby treatment plants into water suitable for industrial use. Once fully operational, the project is expected to reuse more than 83 million gallons (313 million litres) of potable water each year, reducing demand on local groundwater and drinking water supplies. Veolia will deploy modular, containerised treatment systems designed for scalable use. The approach allows similar installations to be introduced at other data centres where conditions allow. Turning wastewater into cooling power for data centres The collaboration also includes the use of artificial intelligence to improve water treatment processes. Amazon Web Services (AWS) will support Veolia in developing systems for real-time optimisation, predictive maintenance, and operational analysis. These tools are intended to improve efficiency and reduce resource consumption across water treatment operations. Estelle Brachlianoff, Chief Executive Officer at Veolia, comments, “We are delighted to collaborate with Amazon to secure its water needs in Mississippi while protecting the local community's resources. This is environmental security in action. "By combining Veolia’s water expertise with Amazon’s AI technologies, we’re transforming data centres into engines of innovation for sustainability. This solution builds on our newly launched offering for data centres.” Will Hewes, Global Water Stewardship Lead at Amazon, adds, “Through our collaborative work on AI applied to water treatment, Veolia will be able to further drive innovation and enhance the efficiency of on-site teams, thanks to automated analytics, actionable recommendations, optimised inventory management, and streamlined maintenance. "We’re pleased to join forces with Veolia to advance more sustainable water use strategies while helping it pioneer more efficient water treatment solutions for customers worldwide.” The project, Amazon says, forms part of its wider aim to become water positive across its direct data centre operations by 2030.

Pure DC expands its Middle East data centres

Pure Data Centres Group (Pure DC), a designer, developer, and operator of hyperscale data centres, has confirmed further investment in the Middle East, including a capacity increase at its Abu Dhabi campus and new development plans in Saudi Arabia. The company has received final approval from TAQA to expand IT capacity at its AUH01 site in Abu Dhabi from 41MW to 48MW. The increase has been achieved through design optimisation and the addition of new power infrastructure, supporting additional demand including AI workloads. The AUH01 campus is located on a 16-acre (64,749m²) site and is designed for phased expansion. One 20MW building is already operational, with initial data hall capacity delivered to a hyperscale customer in 2025. The site uses a combination of air and liquid cooling to support different deployment requirements. Pure DC has also matched 100% of the electricity used at AUH01 in 2025 with International Renewable Energy Certificates (I-RECs), sourced from solar generation at the Mohammed bin Rashid Al Maktoum Solar Park in the UAE. This approach aims to support reduced carbon intensity for operations and contribute to market-based Scope 2 emissions targets. Regional growth plans Alongside its UAE operations, Pure DC has entered a joint venture with Dune Vaults to develop a hyperscale data centre in Riyadh, Saudi Arabia. The RUH01 campus will be built on a 270,000m² site, with an initial design capacity of 57.6MW across two buildings. The development has potential to scale beyond 100MW as demand increases. Gary Wojtaszek, Executive Chairman and Interim CEO at Pure DC, comments, “We remain deeply committed to the Middle East and grateful for support we continue to receive from authorities across the UAE and KSA in the current climate. "Our sites are delivering uninterrupted service, reflecting the resilience and reliability that underpins our presence in the region. While the current macro-political environment may have slowed sector investment, digital demand remains unchanged. "The region’s ambitious national visions recognise the transformation enabled by digital government, enterprise modernisation, and a future-ready workforce. Pure DC is fully committed to contributing to that future through the continued development and operation of world-class digital infrastructure across the Middle East.” For more from Pure DC, click here.

Wärtsilä secures 790MW Texas data centre deal

Wärtsilä, a Finnish technology company that manufactures and services power systems, has secured an order to supply a 790MW off-grid power system for a data centre under construction in Texas, USA. The project will use 42 Wärtsilä 50SG gas engines operating on natural gas to provide primary power for the facility. The order was recorded in the company’s Q2 2026 intake and represents its first data centre-related project in Texas. The deployment reflects growing demand for power in regions where grid capacity is constrained, particularly as large-scale AI and cloud infrastructure continues to expand. Wärtsilä’s engine-based system is designed to deliver continuous power without reliance on the grid, supporting early-stage operations while grid connections are developed or where capacity is limited. Engine-based power for off-grid deployment The selected engines are capable of operating at full output in high temperatures, which is a key consideration for projects in Texas. The system is also designed to support efficiency and emissions requirements, with a heat rate of approximately 6,800 Btu/kWh. The modular configuration allows capacity to be scaled as demand increases, while also enabling integration with renewable energy sources where available. Anders Lindberg, President of Wärtsilä Energy and Executive Vice President of Wärtsilä, comments, “Wärtsilä’s primary power solutions offer significant benefits to data centre developers by providing continuous, reliable primary power while using significantly less water and fuel than traditional alternatives. "Also, our power solutions ramp up quickly and offer a dependable and sustainable foundation for delivering power availability, which is vital for AI and cloud operators. "Our modular engine power plants allow easy capacity scale-ups, making them an ideal choice for the fast-growing data centre market.” Texas continues to attract data centre development due to its access to natural gas resources, established energy infrastructure, and growing renewable generation capacity. Engine-based systems can also be used to support grid balancing once a facility is connected. Equipment delivery for the project is scheduled for 2028, with full operations expected by late 2029. Wärtsilä has now supplied more than 2.4GW of power capacity to data centre projects across the United States.

Yondr powers up 27MW Toronto data centre

Yondr Group, a global developer, owner, and operator of hyperscale data centres, has energised its 27MW data centre in Toronto, marking its entry into the Canadian market. The 4.5-acre (18,211m²) site is expected to be ready for service in mid-2026 and forms part of the company’s wider expansion across North America and Europe. The facility is designed to provide hyperscale capacity to support growing demand for digital infrastructure in the region. The data centre incorporates a closed-loop cooling system to reduce water usage and has been developed in line with the Toronto Green Standard. The site also includes electric vehicle charging points, cycle parking, bird-friendly glazing, and landscaping using native and pollinator plant species. Yondr states that the development aligns with its target to achieve net zero scope one and two emissions by 2030. Sustainability and community engagement initiatives Alongside the build, Yondr has partnered with the University of Toronto to support a scholarship programme for undergraduate students across disciplines including computer science, commerce, life sciences, and physical sciences. The programme offers awards of up to CA$5,000 (£2,700), with two students supported to date. The company has also contributed to local initiatives, including pre-apprenticeship placements, apprentice site tours, support for youth sports teams, and a tree planting event linked to Earth Day. John Madden, Chief Data Center Officer at Yondr Group, says, “We’re proud to mark the energisation of our Toronto data centre campus - a major milestone that moves us another step closer to delivering critical digital infrastructure for the region. "Demand for capacity is accelerating at a pace we’ve never experienced before, driven by AI scale and a shift towards compute-led economies. Our Toronto campus forms a key part of Yondr’s strategy to deliver the next generation of sustainable, high-performance data centre capacity across North America and beyond.” Todd Sauer, VP Design & Construction Americas at Yondr Group, adds, “This campus has been designed with future demand and long-term environmental responsibility in mind, integrating innovative cooling efficiency, resilience, and local sustainability standards from the outset. "Combined with our delivery model and rapid campus deployment approach, we’re unlocking speed, scale, and certainty for customers as they plan the digital infrastructure of tomorrow. “We’re committed to building not just capacity, but lasting value. From delivering hyperscale-ready infrastructure to working with academic partners like the University of Toronto to invest in future talent pipelines, this project represents a significant commitment to the region and its long-term digital growth.” For more from Yondr Group, click here.

ECL developing 35MW Santa Clara data centre

ECL, a US data-centre-as-a-service company, has announced plans to develop a 35MW data centre in Santa Clara, California, USA, designed to support high-density AI workloads using a mix of power sources. The facility, known as CSC-1, will combine on-grid electricity with hydrogen and natural gas generation. The approach is intended to address growing demand for power in data centre markets where grid capacity is limited. CSC-1 will launch with rack densities ranging from 75kW to 270kW, and the site is based on ECL’s FlexGrid architecture, which integrates multiple power inputs and is designed to operate alongside local utility infrastructure. The system is expected to deliver a power usage effectiveness (PUE) of below 1.15 while supporting lower emissions through a combination of cooling methods. The development will follow a phased approach, starting with an initial 2.5MW deployment and scaling up to full capacity as demand increases. This model is intended to allow operators to begin AI workloads earlier, without waiting for full site completion. Modular power approach addresses grid constraints Northern California remains a constrained market for data centre power, with delays in grid connections affecting new developments. As a result, alternative approaches such as on-site power generation are becoming more widely adopted. ECL’s FlexGrid system uses modular power blocks that can be deployed incrementally. This allows capacity to be added over time, aligning infrastructure growth with demand for AI compute. The system also incorporates different cooling methods, including direct-to-chip and air cooling. When hydrogen is used as a power source, by-product water can be reused within the cooling process, reducing the need for additional water supply. The architecture is designed to meet Tier III-level reliability requirements and includes a real-time management platform to monitor and adjust power generation, cooling, and rack-level operations. Yuval Bachar, Co-founder and CEO of ECL, comments, “A 35MW facility delivered in Santa Clara in under a year would have been unthinkable through traditional grid-connected development. "Every major AI operator in the Bay Area is staring at the same maths, with years-long interconnection queues pitted against AI deployment needs that are growing by the minute. "By phasing growth through modular power blocks, ECL matches infrastructure deployment to the actual pace of AI demand rather than forcing customers to overbuild or wait. This site demonstrates that power architecture itself can become the enabling layer for AI scale rather than the constraint.” ECL is currently accepting enquiries from prospective tenants for the site. For more from ECL, click here.

'AI growth doesn’t have to break the grid'

A UK high‑performance computing (HPC) data centre has reportedly cut its carbon emissions by three quarters while easing pressure on the electricity system, offering a blueprint for how the fast‑growing AI sector can expand without overwhelming the grid. Stellium Datacenters, which operates one the UK's largest purpose-built data centre campuses near Newcastle, has switched to a new way of sourcing electricity. This matches its power use with renewable generation hour by hour, rather than relying on annual averages. The move comes as data centres face mounting scrutiny over their energy use, with concerns growing that AI and cloud computing could strain local grids and push up energy costs. That scrutiny has intensified in recent months, with MPs launching an inquiry through the Environmental Audit Committee into the environmental impact of data centres, including their growing electricity and water use and the pressure they place on local grids. Working with renewable energy supplier Good Energy, Stellium now runs its site on a 100% renewable, hourly‑matched electricity supply, linking consumption directly to power generated by more than 3,300 independent UK renewable generators. This approach allows the company to show exactly when its electricity demand is met by renewable sources, achieving an hourly matching score of 95.4%, more than double the current market average of around 43%. Planned additions, including large-scale battery storage, are expected to lift this to 97–98% while being able to show exactly which UK renewable assets powered the data centre and when. 'Hourly matching' as an improved metric Traditionally, many data centres rely on renewable certificates that show clean electricity was generated somewhere on the grid over a year, even if fossil fuels were used at the time power was actually consumed. Some “100% renewable” tariffs relying on this system mask continued reliance on fossil-fuelled power at precisely the moments when the grid is most constrained. By contrast, hourly matching provides a much clearer picture of real‑world impact, demonstrating which users are sourcing clean, homegrown power versus relying on fossil‑fuelled generation at peak times. Stellium says the change has transformed conversations with customers, regulators, and auditors, particularly global AI and technology firms with strict net zero and reporting requirements. The company says it can now demonstrate, in detail, which renewable assets powered its operations, when they did so, and where they are located. Paul Mellon, Operations Director at Stellium, notes, “Data centres often get bad press for their high, inflexible energy use. But this shows that AI and high‑performance computing don’t have to come at the expense of the grid or the climate. "By switching to hourly‑matched renewable power, we’ve been able to cut emissions dramatically while giving customers the transparency they increasingly demand.” Nigel Pocklington, CEO of Good Energy, adds, “By matching electricity use with renewable generation hour by hour, Stellium can show when clean power is actually being used. "That kind of transparency cuts carbon emissions, reduces reliance on fossil fuels at peak times, and proves that digital growth and a resilient energy system can go hand in hand.” Explosive data centre growth in the UK The case comes as the UK prepares for a major expansion in data centre capacity to support AI, cloud computing, and data‑driven industries. As planners, communities, and policymakers look more closely at how new developments will affect local infrastructure, Stellium’s experience suggests that data centres can respond by sourcing and reporting their energy responsibly, rather than relying on offsetting or misleading annualised accounting. With pressure growing on the sector to prove its environmental credentials, the model demonstrates that practical solutions may already exist, and that AI‑driven growth can be aligned with a cleaner, more resilient electricity system. For more from Stellium Datacenters, click here.

STL launches Neuralis US data centre platform

STL, an optical and digital systems company, has launched its Neuralis data centre connectivity portfolio in the United States, targeting infrastructure designed for artificial intelligence and high-density computing environments. The announcement was made by STL Optical Connectivity NA, the company’s US subsidiary, at Data Center World 2026 in Washington, D.C. Neuralis is designed to support evolving data centre requirements, particularly the shift towards AI workloads, hyperscale computing, and edge deployments. These trends are increasing demand for high-speed, high-density connectivity within and between facilities. The portfolio focuses on managing the transition from traditional north–south traffic flows to more intensive east–west traffic, driven by GPU-based architectures and AI training processes. Designed for high-density AI infrastructure The Neuralis portfolio is structured around two main areas: The first focuses on maximising data centre space through the use of high-density, pre-terminated fibre cabling. This approach moves connection work into manufacturing environments, reducing on-site installation time and complexity. The second area addresses data centre interconnect (DCI), supporting large-scale data transfer between sites. This includes fibre infrastructure designed for high-capacity environments, with cables capable of supporting large fibre counts for AI deployments. STL has developed the portfolio through collaboration with customers, with a focus on addressing space, density, and deployment challenges in modern data centres. The company’s manufacturing process covers the full fibre lifecycle, including preform production, fibre drawing, cabling, and connector integration. Production for the US market is supported by STL’s facility in Lugoff, South Carolina. Ankit Agarwal, Managing Director of STL, notes, "AI demands a level of precision and density that traditional cabling simply cannot meet. "With STL Neuralis, we are providing the high-speed, low-latency foundation that allows GPU clusters to perform at their peak, moving complexity out of the field and into a controlled, high-precision factory environment." The launch reflects increasing demand for infrastructure capable of supporting AI-driven workloads, as operators continue to scale data centre capacity across North America. For more from STL, click here.

OVHcloud expands quantum cloud platform with Quandela

OVHcloud, a French cloud computing provider, has made photonic quantum computing company Quandela’s Belenos quantum computer available through its Quantum platform, expanding access to quantum computing across Europe. The announcement was made at the Quantum Defence Summit, with the addition of Belenos marking a further development of OVHcloud’s cloud-based quantum offering. The OVHcloud Quantum platform provides access to quantum systems through a Quantum-as-a-Service model, allowing organisations to use quantum computing resources without requiring dedicated hardware. Belenos is based on photonic quantum technology and offers a capacity of 12 qubits. It is intended to support experimentation with algorithms across a range of areas, including image processing, artificial intelligence, and quantum machine learning. Potential applications also extend to fields such as simulation, engineering, and environmental modelling. Expanding access to quantum computing in Europe OVHcloud says it has been supporting the European quantum ecosystem since 2022, providing access to quantum emulators through its infrastructure. The platform currently includes multiple emulators, enabling users to test and develop applications across different quantum computing approaches. The addition of Belenos introduces a physical quantum processing unit to the platform, complementing existing emulator-based access. Miroslaw Klaba, R&D Director at OVHcloud, comments, “We are delighted to deliver on the promise of the Quantum platform by adding a second reference quantum computer, Belenos, from the French company Quandela. "The quantum revolution accelerates and OVHcloud is taking its part as the European cloud leader within the ecosystem.” The system is available through a usage-based pricing model, with billing calculated per second and no long-term commitment required. Niccolò Somaschi, CEO and co-founder of Quandela, notes, “The integration of Belenos 12 qubits into the OVHcloud portfolio marks a decisive step for quantum in Europe. Accessible through the cloud, this photonic computer becomes a concrete tool for businesses. "With OVHcloud, we are offering data scientists and innovators alike the means to develop their algorithms on a flexible and sovereign infrastructure.” The expansion reflects ongoing efforts to increase accessibility to quantum computing, supporting research and development across industry and academia. For more from OVHcloud, click here.