METHOD FOR OPERATING AN ENERGY SUPPLY DEVICE FOR AT LEAST ONE MOTOR VEHICLE AND CORRESPONDING ENERGY SUPPLY DEVICE

The invention relates to a method for operating an energy supply device (1) for at least one motor vehicle (2,3). The method provides that at an electrical connection (4) of the energy supply device (1) electrical current from a power source (65) is provided at least intermittently, and at a hydrogen connection (5) of the energy supply device (1) hydrogen from a hydrogen storage (12) is provided at least intermittently for transfer to the at least one motor vehicle (2,3), wherein the hydrogen is obtained by electrolysis from water using electrical current from the power source (65), and wherein the power source (65) has a thermal energy storage (40) for temporary storage of thermal energy which is used at least intermittently to provide the electrical current. The invention further relates to an energy supply device (1) for at least one motor vehicle (2,3).