TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Solution: The chemical hydride solution is a borohydride water solution in which the solute is in the form of MBxHy, where M is a metal and the solute is selected from sodium borohydride, lithium borohydride, potassium borohydride and rubidium borohydride or selected from ammonium borohydride.The solute such as sodium borohydride and lithium borohydride are present in an amount of less than 5 weight% (wt.%).Preferred Composition: The chemical hydride solution further contains a freezing point depressing agent such as glycerol present in the concentration of less than 5 wt.%, preferably 1 wt.%, and alkaline additives selected from lithium hydroxide, potassium hydroxide and sodium hydroxide, preferably sodium hydroxide present in an amount of 0.1 wt.%.    TECHNOLOGY FOCUS - MECHANICAL ENGINEERING - Preferred Components: The chemical hydride hydrogen generation system further has a return line for the solution provided between the storage device and the reactor, a flow control unit and a heat exchanger (14) for removing heat from the reactor and supplying the heat to the reactor. The flow control unit operatively stops the supplying unit when the hydrogen pressure in the reactor reaches a preset value (I) and activates the supplying device when the hydrogen pressure unit in the reactors falls to a preset value (II) less than the preset value (I).The recovery unit in the energy system is a gas-water separator.The recovery unit further has a catalytic burner provided between the fuel cell and the gas-water separator and the catalytic burner has inlets connected to outlets of the fuel cell for excess oxidant and hydrogen to bring the unreacted hydrogen and oxygen in the exhaust gas from the fuel cell into reaction to form water.The energy system further has a valve connected to the outlet of the fuel cell for excess hydrogen and to the catalytic burner and to a hydrogen recycle line connected to an inlet of the fuel cell. The valve selectively allows the excess hydrogen leaving the fuel cell after reaction to be circulated back to the fuel cell in a mode (I) and allows the hydrogen to be supplied to the catalytic burner from the fuel cell in the mode (II).The energy system further has a control unit (I) which operatively switches the valve between the modes (I,II), and a control unit (II) which operatively stops the supplying unit when the hydrogen pressure in the reactor reaches a value (I) and activates the supplying unit when the hydrogen pressure in the reactor falls to a value (II) less than the value (I).The energy system further has a heat exchanger which selectively removes heat from the reactor and heats the reactor to control hydrogen generation reaction.