Abstract: A modular metal hydride hydrogen storage system which can provide a robust and reliable source of hydrogen that can quickly and easily be modified for a variety of applications and environments. The hydrogen storage system comprises at least one storage module. Each storage module comprises a container having at least one open end, a metal hydride hydrogen storage means, means for introducing gaseous hydrogen into and withdrawing gaseous hydrogen from the container, and means for connecting storage modules together end-to-end to form a plurality of storage modules.