A fuel cell based power generator comprising: a fuel cell element ; a water exchanger element ; a hydrogen generator element , wherein the hydrogen generator element contains one or more fuels that release hydrogen responsive to exposure to water; an ambient air path configured to receive ambient air and provide the ambient air across a cathode side of the fuel cell element , receive water from the fuel cell element and provide wet air to the water exchanger element ; and a recirculating hydrogen path configured to receive hydrogen from the hydrogen generator element , provide the hydrogen past an anode side of the fuel cell element to the water exchanger element and provide wet hydrogen back to the hydrogen generator element ; wherein the fuel cell based generator further comprises: a water exchanger element temperature sensor positioned to sense a temperature of the water exchanger element ; a recirculating hydrogen path heat exchanger with fan disposed in the recirculating hydrogen path coupled to the water exchanger element ; an ambient air path heat exchanger element with fan disposed in the ambient air path coupled to the water exchanger element ; and a fan controller to receive temperature information from the water exchanger element temperature sensor and control heat exchanger fan speeds to maintain the water exchanger element temperature at a water exchanger selected temperature. a fuel cell element ; a water exchanger element ; a hydrogen generator element , wherein the hydrogen generator element contains one or more fuels that release hydrogen responsive to exposure to water; an ambient air path configured to receive ambient air and provide the ambient air across a cathode side of the fuel cell element , receive water from the fuel cell element and provide wet air to the water exchanger element ; and a recirculating hydrogen path configured to receive hydrogen from the hydrogen generator element , provide the hydrogen past an anode side of the fuel cell element to the water exchanger element and provide wet hydrogen back to the hydrogen generator element ; wherein the fuel cell based generator further comprises: a water exchanger element temperature sensor positioned to sense a temperature of the water exchanger element ; a recirculating hydrogen path heat exchanger with fan disposed in the recirculating hydrogen path coupled to the water exchanger element ; an ambient air path heat exchanger element with fan disposed in the ambient air path coupled to the water exchanger element ; and a fan controller to receive temperature information from the water exchanger element temperature sensor and control heat exchanger fan speeds to maintain the water exchanger element temperature at a water exchanger selected temperature. a water exchanger element temperature sensor positioned to sense a temperature of the water exchanger element ; a recirculating hydrogen path heat exchanger with fan disposed in the recirculating hydrogen path coupled to the water exchanger element ; an ambient air path heat exchanger element with fan disposed in the ambient air path coupled to the water exchanger element ; and a fan controller to receive temperature information from the water exchanger element temperature sensor and control heat exchanger fan speeds to maintain the water exchanger element temperature at a water exchanger selected temperature. <EOS>