NOVELTY - Hydrogen generator comprises housing; fuel pellets disposed in the housing, each fuel pellet comprising a hydrogen-containing reactant that will react to release hydrogen gas when heated; heating elements extending into the fuel pellets to generate heat to selectively heat one or more fuel pellets to initiate a reaction to produce hydrogen gas; and electrically conductive connectors operatively coupled to the heating elements to selectively supply electrical power to the heating elements.    USE - The hydrogen generator is useful for supplying hydrogen gas to fuel cell stack.    ADVANTAGE - The hydrogen generator capable of supplying hydrogen gas to a fuel cell stack has one or more of the following features: capable providing a large total volume of hydrogen gas per unit of mass and per unit of volume of the hydrogen generator, capable of controlling the reaction of the reactant(s) to efficiently provide hydrogen on an as-needed basis without producing an excessive internal pressure within the hydrogen generator, able to operate at or below a desired maximum temperature, all or a portion of the hydrogen generator in a fuel cell system can be replaced after reactants have been consumed, long-term durability and reliability and easy and economic manufacturing.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) a fuel pellet for a hydrogen generator, comprising a solid comprising a hydrogen-containing reactant that reacts to release hydrogen gas when heated; and a heating element extending into the solid and having a first electrical terminal at a first end and a second electrical terminal at an opposite second end, where the first and second electrical terminals allow electrical current to conduct on the heating element to generate heat within the solid to release hydrogen gas; and    (2) a fuel cell system comprising a fuel cell comprising a hydrogen gas input; and a hydrogen generator comprising a housing; fuel pellets disposed in the housing, each fuel pellet comprising a hydrogen-containing reactant that will react to release hydrogen gas when heated; heating elements extending into the fuel pellets to generate heat to selectively heat one or more fuel pellets to initiate a reaction to produce hydrogen gas; electrically conductive connectors operatively coupled to the heating elements to selectively supply electrical power to the heating elements; and a hydrogen outlet coupled to the housing to provide a hydrogen outlet path to the hydrogen gas input of the fuel cell.