GRID SUPPORTING ELECTROLYZER

Systems, devices, methods, and instructions for operating an electrolyzer, including setting a nominal frequency or a nominal voltage of a connected electrical power system, the electrolyzer being configured to deliver a rated production level at the nominal frequency or the nominal voltage, setting an adjustable dead band at or near the nominal frequency or the nominal voltage, and reducing hydrogen generation and reducing power consumption if the frequency drops below the nominal frequency or if the voltage drops below the nominal voltage.