NOVELTY - An electric power generating unit comprises an ammonia storage device in the form of container comprising ammonia absorbing and releasing salt; heating device for subjecting container and ammonia absorbing and releasing for releasing ammonia gas; and fuel cell for converting ammonia directly into electric power, or reactor for dissociating ammonia into hydrogen and nitrogen and fuel cell for converting hydrogen into electric power.    USE - For use in large stationary energy producing facilities, small rechargeable and replaceable power supply units for micro-fabricated or miniaturized ammonia deposition reactors for use in mobile units and portable devices e.g. laptop computer.    ADVANTAGE - The inventive electric power generating unit solves a number of problems hampering the use of existing media for energy storage by providing higher energy density, improved user safety, simpler handling and transport, good compatibility with other existing fuel cells.    DETAILED DESCRIPTION - An electric power generating unit comprises an ammonia storage device in the form of container (2) comprising ammonia absorbing and releasing salt; heating device for subjecting container and ammonia absorbing and releasing for releasing ammonia gas; and fuel cell for converting ammonia directly into electric power, or reactor for dissociating ammonia into hydrogen and nitrogen and fuel cell for converting hydrogen into electric power. The salt is of formula: Ma(NH3)nXz.    M=cations such as alkali metals, alkaline earth metals, or transition metals e.g. Li, Na, K, Cs, Mg, Ca, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, NaAl, KAI, K2Zn, CsCu, or K2Fe;    X=anions such as fluoride, chloride, bromide, iodide, nitrate, thiocyanate, sulfate, molybdate, or phosphate ions;    a=cations per salt molecule;    z=anions per salt molecule; and    n=coordination number such as 2-12    DESCRIPTION OF DRAWING(S) - The drawing shows a part of the power generating unit in the invention.    Storage medium (1)    Container (2)    Electrochemical power generating unit (4)    Heterogeneous catalyst (6)    Integrated unit (7)    Buffer volume (8a)    Electronic controller (10)