An electrolysis device, - wherein the electrolysis device comprises a first and a second electrolysis unit (1, 2), - wherein the first and the second electrolysis unit (1, 2) each comprise a first and a second end plate (3, 4, 6, 7), - wherein the first and the second electrolysis unit (1, 2) each include a respective intermediate plate (5, 8) arranged approximately or exactly in the middle between the respective first and the respective second end plate (3, 4, 6, 7), - wherein the first and the second electrolysis unit (1, 2) each include a stack of electrolysis cells between the respective intermediate plate (5, 8) and each of the two respective end plates (3, 4, 6, 7), - wherein the electrolysis cells of the respective stack are each electrically connected in series, - wherein the electrolysis cells each include a first electrode and a second electrode at which an electrolysis liquid is partially electrolytically split, so that the remaining electrolysis liquid is admixed after the electrolytic splitting with a first electrolysis gas in the area of the respective first electrode and with a second electrolysis gas in the area of the respective second electrode, - wherein the first end plate of the first electrolysis unit and the first end plate of the second electrolysis unit are electrically connected to one another, - wherein the second end plate of the first electrolysis unit and the second end plate of the second electrolysis unit are electrically connected to one another, - wherein the electrolysis device includes a rectifier unit, which provides a first potential via a first output and provides a second potential via a second output, and - wherein the first output of the rectifier unit is electrically connected to a terminal of the intermediate plate of the first electrolysis unit and the second output of the rectifier unit is electrically connected to a terminal of the intermediate plate of the second electrolysis unit. - wherein the electrolysis device comprises a first and a second electrolysis unit (1, 2), - wherein the first and the second electrolysis unit (1, 2) each comprise a first and a second end plate (3, 4, 6, 7), - wherein the first and the second electrolysis unit (1, 2) each include a respective intermediate plate (5, 8) arranged approximately or exactly in the middle between the respective first and the respective second end plate (3, 4, 6, 7), - wherein the first and the second electrolysis unit (1, 2) each include a stack of electrolysis cells between the respective intermediate plate (5, 8) and each of the two respective end plates (3, 4, 6, 7), - wherein the electrolysis cells of the respective stack are each electrically connected in series, - wherein the electrolysis cells each include a first electrode and a second electrode at which an electrolysis liquid is partially electrolytically split, so that the remaining electrolysis liquid is admixed after the electrolytic splitting with a first electrolysis gas in the area of the respective first electrode and with a second electrolysis gas in the area of the respective second electrode, - wherein the first end plate of the first electrolysis unit and the first end plate of the second electrolysis unit are electrically connected to one another, - wherein the second end plate of the first electrolysis unit and the second end plate of the second electrolysis unit are electrically connected to one another, - wherein the electrolysis device includes a rectifier unit, which provides a first potential via a first output and provides a second potential via a second output, and - wherein the first output of the rectifier unit is electrically connected to a terminal of the intermediate plate of the first electrolysis unit and the second output of the rectifier unit is electrically connected to a terminal of the intermediate plate of the second electrolysis unit.