The invention presented relates to a regeneration method (100) for regenerating a contaminated fuel cell stack (201). The regeneration method (100) comprises: introducing (101) reconditioning reagent into the fuel cell stack (201), flushing (103) the reconditioning reagent from the fuel cell stack (201), wherein the reconditioning reagent contains mobile anions or a precursor of mobile anions.

By processing circuitry executing a program recorded in a storage unit, a control method for a fuel cell system includes calculating a load output and calculating a maximum output, comparing the load output with the maximum output, and controlling, in a case that the load output exceeds the maximum output, the fuel cell system to decrease a power storage output used by a load, by increasing a power generation output.

A method and a computer system for controlling a fuel cell system, such as of a vehicle, is described. The computer system comprises comprising processing circuitry to predict an event, such as a downhill road section, during which a power ramp down of the fuel cell system is expected, control the fuel cell system to recuperate water from at least one fuel cell exhaust line and collect the recuperated water in a water reservoir in dependence on the predicted event, control a water injector to inject water from the water reservoir into a cathode inlet line of the fuel cell system in connection with the power ramp down during the predicted event.

A microbial fuel cell multiplexer apparatus, system and method. In one embodiment, a microbial fuel cell (MFC) multiplexer, comprising a microcontroller suitable for receiving information from a MFC electronics unit and reformatting the information according to a communications protocol, and further comprising a processor and a non-transitory storage medium capable of storing machine-readable instructions; a host port connected to a host platform, wherein the host platform provides a power source and an operating terminal; a plurality of isolator chips, electrically connected to the microcontroller, designed to isolate a plurality of MFCs; and a plurality of unit ports each arranged to connect each of the plurality of isolator chips to one of the plurality of MFCs.