NOVELTY - A provision of power output (57) from proton exchange membrane fuel cell power plant to stationary load, or as motive power to vehicle (59) comprises disconnecting power output of power plant from vehicle and connecting predetermined fixed resistive load (60) to power output in place of vehicle; monitoring voltage of at least one fuel cell of power plant; reducing amount of air supplied to air inlets; recycling cathode exhaust gas (42) of fuel cells of power plant to air inlets (34) of fuel cells.    USE - Method for providing power output (57) from proton exchange membrane fuel cell power plant to stationary load, or as motive power to vehicle (59).    ADVANTAGE - The method controls voltage of fuel cells when fuel cell stack is operating at low power levels.    DETAILED DESCRIPTION - The provision of power output (57) from proton exchange membrane fuel cell power plant to stationary load, or as motive power to vehicle (59) comprises:    (A) disconnecting power output of power plant from vehicle and connecting predetermined fixed resistive load (60) to power output in place of vehicle;    (B) monitoring voltage of at least one fuel cell of power plant;    (C) reducing amount of air supplied to air inlets; and    (D) recycling cathode exhaust gas (42) of fuel cells of power plant to air inlets (34) of fuel cells to limit voltage of at least one cell to less than critical voltage below which corrosion in a cell is not excessive.    An INDEPENDENT CLAIM is included for power generating apparatus comprising fuel cell power plant for providing electric power to vehicular output load or to stationary output load. The power plant includes stack of fuel cells comprising membrane electrode assembly having anode catalyst layer and cathode catalyst layer with proton exchange membrane disposed between layers; porous, hydrophilic, anode water transport plate having fuel flow field channels disposed adjacent anode catalyst layer, with or without additional layer between anode water transport plate and anode catalyst layer; porous, hydrophilic, cathode water transport plate having oxidant flow field channels disposed adjacent cathode catalyst layer, with or without additional layer between cathode water transport plate and the cathode catalyst layer. The power plant further comprises controller; source of fuel connected through controllable fuel valve to inlets of fuel flow field channels; air source for providing controllable amount of air to air inlets of oxidant flow field channels; selectively operable recycle loop including airblower or air recycle blower for responding to controller to recycle controllable amount of oxidant flow field exhaust to inlets of oxidant flow fields; and resistive load selected to dissipate predetermined small fraction of fuel cell stack maximum power when stack applies a predetermined critical voltage to resistive load; and controllable switch for alternatively connecting electric output of stack to output load or to resistive load.    DESCRIPTION OF DRAWING(S) - The drawing is a simplified, schematic diagram showing a fuel cell power plant.    Air inlets (34)    Exhaust gas (42)    Power output (57)    Vehicle (59)    Resistive load (60)