The upcoming Pantheon AI campus in Topusko is set to catalyze a significant investment in energy infrastructure, with an estimated €400 million to €450 million earmarked for transmission systems. Construction on these vital assets is anticipated to commence in late 2027, marking a pivotal step in what is being described as one of Croatia’s most ambitious technology initiatives.
As articulated by project leaders, including Mario Gudelj and Bruno Štambak from Dalekovod Group, the establishment of robust power infrastructure is essential for the future AI data center, projected to be valued at approximately $50 billion. Financing for this transmission network has already been secured, with operational users expected to begin utilizing the facility by early 2029.
The proposed electricity network will feature a new 400 kV transmission system comprising four lines that will extend roughly 300 kilometers. Additionally, a new transformer station is planned, which is projected to be the largest in Croatia. Upon completion, these assets are intended to be transferred to the Croatian transmission system operator HOPS.
Developers have highlighted that the infrastructure will adhere to stringent redundancy and reliability standards. While the AI campus is projected to require around 1 GW of electricity, the design allows for higher capacity margins, with each line capable of handling approximately 1.3 GW. This approach aims to ensure long-term operational stability for the facility.
Electricity procurement strategies will deviate from traditional models, primarily relying on long-term power purchase agreements (PPAs) instead of direct engagement with Croatia’s wholesale electricity market. A notable agreement has already been established with Greenvolt, and further supplies are anticipated from various renewable energy developers.
The energy sources planned for this project include solar, wind, geothermal, and hydropower, supplemented by future battery storage solutions aimed at enhancing flexibility and grid stability. The total renewable generation capacity required for the AI campus is estimated at around 2 GW to meet its annual electricity needs.
Furthermore, proponents of the project assert that it could bolster Croatia’s overall electricity system by facilitating the integration of more than 5 GW of additional renewable projects currently under development. Concerns regarding potential electricity shortages or market price distortions have been dismissed by project officials, who point toward anticipated growth in domestic power generation capacity over the coming years.
