A power source that provides at least one of thermal and electrical power and method of use thereof such as direct electricity or thermal to electricity is provided that powers a power system comprising (i) at least one reaction cell comprising a fuel having atomic hydrogen, nascent H2O; and a material to cause the fuel to be highly conductive, (iii) at least one set of electrodes that confine the fuel and an electrical power source that provides a short burst of low-voltage, high-current electrical energy to initiate a reaction and an energy gain, (iv) a product recovery systems such as a condenser, (v) a reloading system, (vi) at least one of hydration, thermal, chemical, and electrochemical systems to regenerate the fuel from the reaction products, (vii) a heat sink that accepts the heat from the power-producing reactions, (viii) a power conversion system.