Abstract: An energy supply system is specified for coupling to a wind power station that is used in island mode and that operates an electrolysis facility for the production of green hydrogen with wind energy. The novel energy supply system has a solar energy source, with a photovoltaic module and/or a solar thermal collector, which is configured to supply the electrolysis facility, in particular a containment and water-carrying lines of electrolysis units of the electrolysis facility, with thermal energy in the event of the absence of wind energy. There is also described a corresponding method for coupling solar energy to a wind power station that is operated in island mode.

Abstract: The invention relates to a method for controlling an electrolysis plant with auxiliary systems and an electrolysis unit and a connection to an unreliable electricity source. For this purpose, firstly a starting condition is defined, which for the change from an idle state to a standby state requires prediction that there will be a sufficient power initially for operation of the auxiliary systems and subsequently over a longer period of time for operation of the electrolysis unit. The starting of electrolysis by way of changing to an operating state is triggered by an operating condition with an operating condition, for which a sufficient period of time with sufficient power is likewise predicted.