The Gabcikovo hydroelectric power plant, Slovakia's largest and a linchpin of its energy grid, is set for a comprehensive modernization led by international technology group ANDRITZ in partnership with Slovak engineering firm VUJE. The contract, awarded by VODOHOSPODARSKA VYSTAVBA, underscores the critical role of this facility, which supplies approximately 10% of the nation's electricity. The announcement, made on September 8, 2026, carries significant weight for Slovakia's energy security and its transition to sustainable power generation.
With a current installed capacity of 720 megawatts, the plant's eight Kaplan turbine-generator units will be systematically refurbished to the latest technical standards. The project's primary objectives are to boost efficiency and availability while extending the operational lifespan of key equipment by at least three decades. This is not merely an upgrade; it is a strategic investment in the long-term resilience of Slovakia's renewable energy infrastructure.
The scope of work is extensive, covering model testing, engineering, manufacturing, installation, and commissioning. It includes modernization of turbine and generator components, automation systems, excitation, protection, and control systems, as well as the renewal of transformers and auxiliary electrical systems. The work will be executed sequentially to minimize disruption to the plant's operations, ensuring that electricity generation continues throughout the renovation period—a critical consideration for maintaining grid stability.
The order value is in the mid three-digit million-euro range and has been included in ANDRITZ's order intake for the third quarter of 2026. This investment reflects the growing recognition that modernizing existing hydroelectric facilities is one of the most cost-effective ways to enhance renewable energy capacity without the environmental and social impacts of new dam construction. According to the International Hydropower Association, upgrading older plants can increase their efficiency by 5-10%, effectively adding new clean energy capacity without new reservoirs.
For Slovakia, the importance of this project extends beyond mere equipment renewal. The Gabcikovo plant is a cornerstone of the nation's energy mix, and its reliable operation is vital for meeting peak demand and balancing intermittent sources like solar and wind. By extending the plant's service life and improving its performance, the modernization directly supports Slovakia's commitment to reducing greenhouse gas emissions and increasing the share of renewables in its energy portfolio, as outlined in its national energy and climate plan.
ANDRITZ, with its global reputation in hydropower and over 185 years of innovation, brings a wealth of experience to the project. The company has a track record of delivering similar large-scale modernizations worldwide. VUJE, a Slovak firm with deep local knowledge, will ensure that the project aligns with national regulations and practices. Together, they form a partnership that balances global expertise with local insight, a key factor for the successful execution of such complex infrastructure work.
As nations worldwide grapple with the dual challenges of aging energy infrastructure and the urgent need to decarbonize, the Gabcikovo modernization serves as a model for how strategic investments in existing renewable assets can yield significant benefits. The project not only secures a reliable source of clean electricity for Slovakia but also demonstrates the critical role that hydropower plays in a sustainable energy future.
