The article discusses the potential of Ti–V–Cr alloys for solid state hydrogen storage, focusing on enhancing hydrogen storage capacity for transport applications. Ti–V–Cr alloys have shown promise in absorbing hydrogen under ambient conditions, with Ti2CrV alloy exhibiting a maximum hydrogen uptake of 4.37 wt%. The study explores the impact of Sc and Ni double substitution in the alloy, resulting in a hydrogen storage capacity of 4 wt% at room temperature. Neutron diffraction studies are used to determine hydrogen atom positions in the crystal lattice, crucial for optimizing storage properties. Additionally, differential scanning calorimetric studies compare stability of saturated hydrides and deuterides in Ti2CrV and Ti1.5Sc0.3CrVNi0.2 alloys, shedding light on isotope effects and providing deeper insights into hydrogen storage behavior.