NOVELTY - A generation apparatus has first system fluidly coupled to water source and electrically coupled to electrical energy source that receives water and electrical energy to produced deionized water; and second system operable in fuel or power generation mode. The second system is fluidly coupled to the first system to receive deionized water.    USE - For production of electrical energy and hydrogen (claimed).    DETAILED DESCRIPTION - The generation apparatus comprises first system fluidly coupled to water source and electrically coupled to electrical energy source that receives water and electrical energy to produced deionized water; and second system operable in fuel or power generation mode. The second system is fluidly coupled to the first system to receive deionized water and electrically coupled to the electrical energy source to receive electrical energy to generate hydrogen and oxygen when the system is operating in the fuel generation mode, the hydrogen being received by a fluidly coupled hydrogen storage system, and the second system receiving hydrogen from the hydrogen storage system and an oxidizer from an oxidizer source that is fluidly coupled to the second system and combining the hydrogen and oxidizer to generate electrical energy when the system is operating in the power generation mode.    INDEPENDENT CLAIMS are also included for:    (1) an apparatus for water deionization and reactant conditioning comprising a first electrode; second electrode; electrically insulative, fluid permeable membrane; electrically insulative, non-fluid permeable layer; and power supply; and    (2) a method for producing hydrogen and generating electrical energy comprising receiving water from water source; deionizing the received water to obtain deionized water; dissociating the deionized water to obtain hydrogen; and combining the hydrogen with oxidizer in fuel cell device to generate electrical energy.    DESCRIPTION OF DRAWING(S) - The figure is a schematic diagram of an integrated power generation apparatus.    Power generation apparatus (70)    Power converter (709)    PEME stack (801)    PEMFC stack (802)    CDI stack (803)    Phase separator (810)    Heat exchanger (844)