The hydrogen accumulation in metal hydrides is the urgent problem of hydrogen power engineering and the demand for metal hydrides as capacitive, safe and convenient in service sources of hydrogen has stimulated the study of hydrogen capacity of multicomponent alloys. In recent years, much attention has been given by scientists to the investigation of hydrogen-sorption and desorption properties of different materials, including nanocarbon structures and composites on their base, the study of peculiarities of the reversible hydrogen interaction with hydride forming metals and alloys, the development of high-pure hydrogen storage and transportation in solids. The present work is devoted to the development and methodology of selection of the chemical composition of metal hydride alloy for hydrogen accumulators. Copyright (c) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.