Elogen, a subsidiary of Gaztransport & Technigaz (GTT), has been selected by Slovak company RoyalStav to supply an electrolyser for a project led by Veolia Energia Slovensko. The installation aims to produce hydrogen from renewable electricity and integrate it into an existing cogeneration plant (CHP).
The chosen technology is based on a Proton Exchange Membrane (PEM) electrolyser with a capacity of 1 megawatt. The unit will be designed and manufactured by Elogen, with on-site commissioning scheduled for 2026. The project is located near the town of Žiar nad Hronom in Slovakia.
Hydrogen to be injected into existing gas turbine
The project’s objective is to partially replace the natural gas used in the gas turbine of the plant with green hydrogen produced locally by electrolysis. According to the developers, this approach is expected to reduce emissions from the existing thermal facility without requiring complete equipment replacement.
Any hydrogen not consumed by the plant will be allocated for other uses, including vehicle refuelling via a dedicated station. The entire system will be connected to a photovoltaic plant, whose electricity production will directly power the electrolyser to ensure the renewable origin of the gas produced.
Collaboration between local and French industrial players
RoyalStav, a local energy engineering company, is leading the technical design of the site in collaboration with Veolia Energia Slovensko, a subsidiary of French group Veolia. The company states that the project was designed to meet the criteria defined in the European Union’s green taxonomy and to allow for optimal use of surplus renewable electricity for grid stabilisation.
Elogen, which designs electrolysers for the hydrogen sector, is strengthening its presence in the Central European market through this order. The contract also confirms its ability to respond to hybrid projects integrating electricity production, conversion, and mobility.
