Demonstration of 4 MW Pressurized Alkaline Electrolyser for Grid Balancing Services
March 2017 - August 2023


The main aim of project Demo4Grid is the commercial setup and demonstration of a technical solution utilizing “above state of the art” Pressurized Alkaline Electrolyser (PAE) technology for providing grid balancing services in real operational and market conditions.

In order to validate existing significant differences in local market and grid requirements Demo4Grid has chosen to setup a demonstration site in Austria to demonstrate a viable business case for the operation of a large scale electrolyser adapted to specific local conditions that will be found throughout Europe. To achieve that, Demo4Grid will demonstrate at this demo site with particular needs for hydrogen as a means of harvesting RE production:

  • A technical solution to meet all core requirements for providing grid balancing services with a large scale PAE in direct cooperation with grid operators.
  • A market based solution to provide value added services and revenues for the operation strategy to achieve commercial success providing grid services and those profits obtained also from the hydrogen application.
  • Aiming at the exploitation of the results after the project ends, Demo4Grid will assess the replicability and viability of various business cases Demo4Grid will be the decisive demonstration stage of previous FCH-JU projects related to the PAE addressed in this proposal.

Demo4Grid will be the decisive demonstration stage of FCH-JU's previous projects, ELYGRID and ELYntegration, which provided promising results on the development of PAE to provide grid services operating under dynamic profiles.


FHA leads WP7 Communication and dissemination of the project and also has WP 6 tasks on evaluation of commercial operation and project results.

Funding entities

This project has received funding from the Fuel Cells and Hydrogen 2 Joint Undertaking under grant agreement No 735485. This Joint Undertaking receives support from the European Union’s Horizon 2020 research and innovation programme and Hydrogen Europe and N.ERGHY.

This work is supported by the Swiss State Secretariat for Education, Research and Innovation (SERI) under contract number 17.00009.