NOVELTY - A system comprises a modular hydrogen storage system comprising discrete modules each constructed and arranged so the hydrogen can be delivered from a discrete module independent of the other modules. Each module further comprises a separate heater so the each module can be selective heated independent of the other modules.    USE - As system for delivering hydrogen in vehicle (claimed).    ADVANTAGE - Using modular hydrogen storage system discrete modules enable hydrogen to be desorbed independently from the rest of the system. During desorption, if only a portion of the system is required for operation, only that segment is heated, thus requiring less parasitic energy. This can also be important for start-up. If the system is initially cold, a single module can be rapidly heated to the operating temperature required to deliver hydrogen. Of even greater importance to energy efficiency is that only the modules that have hydrogen left in them are heated while empty modules would be allowed to cool until refueling. This is especially important when a vehicle uses a full tank over many days because continually heating spent storage media that does not produce hydrogen is wasted energy. Additionally, if certain portions of the system are reacting at different rates (due to composition, temperature) the capabilities of each bed can be coordinated to provide the appropriate flow for the immediate system demands. Thus minimizes overall system temperature and heat usage as well as insure maximum hydrogen flow rate when the storage system is nearly empty. The system enables overall increase in storage system energy density as compared to a system that doesn't use a smart delivery control strategy.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for delivering hydrogen in vehicle involving providing a system comprising a modular hydrogen storage system comprising discrete modules each constructed and arranged so that hydrogen can be delivered from a discrete module independent of the other modules, a fuel cell operative connected to the modular hydrogen storage system, starting up the fuel cell comprising heating less than all of the modules to release hydrogen from the heated modules.