At Zoz Technology Center in Olpe (ZTC) a rather large PV plant with almost 0.2 MW is already connected to the grid and a 40 KW big electrolyzer (MyPhy Energy S12MP) is already installed. The latter is not connected yet but will provide the hydrogen at the latest when the Zoz ZEV fleet (phase II) becomes successful. Since this facility should or must respectively segregate large amounts of water into oxygen (ca. 4000 l/h) and hydrogen (ca. 8000 l/h) under leading-in of electricity (Power to Gas) costumers for the very pure gas products need to be found temporarily for an interim period of at least 2 years.