Method for storing discontinuously produced renewable energy, wherein the discontinuously produced renewable energy is electrical energy, wherein hydrogen is produced with the electrical energy, characterised in that a storable intermediate product is produced from a starting material using the hydrogen, and the storable intermediate product is stored until it is required and retrieved to manufacture an end product,, wherein the intermediate product is an iron material obtained in a direct reduction method and the starting material is iron ore reduced with hydrogen and carbon-containing or hydrogen-containing gas fluxes, and the thus-obtained intermediate product of reduced iron ore and optionally accompanying substances is treated metallurgically, wherein the hydrogen is produced by electrolysis of water, wherein the electrical energy required for electrolysis is renewable energy which stems from hydroelectric power and/or wind power and/or photovoltaics or other renewable energy forms, wherein the carbon-containing or hydrogen-containing gas is methane or other carbon carrier gases from biogas production or from the pyrolysis of renewable raw materials, and - wherein a direct reduction plant is operated at the hydrogen production site, in which plant treated iron ores are reduced directly, - the hydrogen and the intermediate product are produced, irrespective of current demand, only when there is sufficient renewably produced electrical energy, wherein - intermediate product which is not in demand is stored until demand/use, with the result that the renewable energy stored therein is also stored, wherein - the ratio between hydrogen from renewable manufacturing and carbon-containing or hydrogen-containing gas fluxes varies continuously, depending on availability, wherein, when there is sufficient renewable energy, hydrogen from production with renewable energy is used, and when there is insufficient discontinuously produced renewable energy, a change over is made to carbon-containing or hydrogen-containing gas fluxes from continuously produced renewable energy. hydrogen is produced with the electrical energy, characterised in that a storable intermediate product is produced from a starting material using the hydrogen, and the storable intermediate product is stored until it is required and retrieved to manufacture an end product,, wherein the intermediate product is an iron material obtained in a direct reduction method and the starting material is iron ore reduced with hydrogen and carbon-containing or hydrogen-containing gas fluxes, and the thus-obtained intermediate product of reduced iron ore and optionally accompanying substances is treated metallurgically, wherein the hydrogen is produced by electrolysis of water, wherein the electrical energy required for electrolysis is renewable energy which stems from hydroelectric power and/or wind power and/or photovoltaics or other renewable energy forms, wherein the carbon-containing or hydrogen-containing gas is methane or other carbon carrier gases from biogas production or from the pyrolysis of renewable raw materials, and - wherein a direct reduction plant is operated at the hydrogen production site, in which plant treated iron ores are reduced directly, - the hydrogen and the intermediate product are produced, irrespective of current demand, only when there is sufficient renewably produced electrical energy, wherein - intermediate product which is not in demand is stored until demand/use, with the result that the renewable energy stored therein is also stored, wherein - - wherein a direct reduction plant is operated at the hydrogen production site, in which plant treated iron ores are reduced directly, - the hydrogen and the intermediate product are produced, irrespective of current demand, only when there is sufficient renewably produced electrical energy, wherein - intermediate product which is not in demand is stored until demand/use, with the result that the renewable energy stored therein is also stored, wherein - the ratio between hydrogen from renewable manufacturing and carbon-containing or hydrogen-containing gas fluxes varies continuously, depending on availability, wherein, when there is sufficient renewable energy, hydrogen from production with renewable energy is used, and when there is insufficient discontinuously produced renewable energy, a change over is made to carbon-containing or hydrogen-containing gas fluxes from continuously produced renewable energy.