NOVELTY - The generator (100) has a reaction chamber including an outlet (116a) for outputting waste solution from the reaction chamber into a waste reservoir (118) as the waste solution is output by chemical reaction in accordance with reaction rate, where the outlet separates from an inlet. A control system controls receipt of additional amounts of aluminum, hydroxide and water (108) by the inlet, controls outputting of the waste solution from the outlet to maintain ratio, and controls amount of hydrogen (114) generated by the generator based on demand for the hydrogen by a consuming apparatus.    USE - Aluminum-alkali hydroxide recyclable hydrogen generator for providing hydrogen fuel to a consuming apparatus e.g. fuel cell, combustion engine, turbine, diesel engine, automobile, lorry, emergency vehicle, construction equipment, inboard boat motor, outboard boat motor, ship, barge, locomotive, motorcycle, bicycle, semi-lorry, submarine, farming equipment, forklift, helicopter, rocket, rubbish lorry, bus, wheel chair, industrial engine, back-up power unit, trucking industry alternative power unit, emergency generator and military equipment (all claimed).    ADVANTAGE - The generator transfers electrical energy to provide a transport mechanism that captures solar or wind power at remote locations without needing an electrical grid to bring electric power to users. The generator limits and controls reactant-limited chemical reaction, so that hydrogen can be generated when needed by a consuming apparatus, thus providing a safe and efficient hydrogen source that does not require an expensive infrastructure of compressed or liquid hydrogen. The generator improves efficiency of hydrogen generation process, so that temperature of the reaction chamber can be controlled to a maximum efficiency point of a thermoelectric generator by regulating rate at which power is drawn from them and by the rate at which air is passed by a cold side of the thermoelectric generators. The generator allows oxygen to be stored in a pressurized container to enhance combustion or input to a fuel cell and to be stored until needed to supercharge the engine to provide the power for passing another car in a vehicle application, thus obviating need for a turbocharger and allowing a smaller horsepower engine to be used, and hence improving fuel economy without reducing performance. The process of hydrogen generation through recovery of reactants is highly reversible when electricity is primary input to the process, and some electrode carbon is lost in standard version of hall-heroult process, so that economics and practicality of the generator reduces cost of electricity and transportation of the reactants to a consumer, thus minimizing cost of the input electrical power.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic block diagram of a hydrogen generator having a chemical reactor that receives aluminum from a first inlet, water from a second inlet, and sodium hydroxide from a third inlet, and outputs hydrogen, waste solution, and heat.    Aluminum-alkali hydroxide recyclable hydrogen generator (100)    Water (108)    Hydrogen (114)    Outlets (116a, 116b)    Waste reservoir (118)