|This project develops the reversible fuel cells and brings it into applications for the first time worldwide. The combination of fuel cell and electrolyser in one stack allows a significant cost reduction in the components and the systems. Remote power supply systems for telecom and uninterruptible power suppliers with long back-up times will be demonstrated. All applications have very high requirements on power availability and reliability. R&D on the components and the general system concepts will be perfumed. The consortium consists of technology end-users, component manufactures and research institutions on hydrogen technologies and autonomous power suppliers . The technology opens new markets in rapid growing sectors. The hydrogen storage system replaces batteries and diesel generators which affect the environment. This project fits perfectly with TA K.