Abstract: Embodiments of various aspects described herein are directed to a metal oxidation warming system (MOWS), a hydrogen storage system, and a co-generation system. These systems include an enclosure subdivided into a plurality of compartments, a fluid reservoir connected to a fluid manifold, and a plurality of fluid conduits connected through an inlet to the fluid manifold. Compartments include an active metal that reacts with a fluid delivered through the inlets and produces heat and hydrogen gas, which can be captured for heat and for driving a fuel cell.