Recently, new type of frustrated magnets, BaV10O15 and SrV10O15, were found to exhibit interesting phenomena due to mixed valence ions forming a modified triangular lattice. BaV10O15 undergoes a structural phase transition at TS=123K. It was attributed to a charge ordering of four V3+ and one V2+ ions, and where three out of four V3+ ions form a trimer. Upon further cooling, BaV10O15 order antiferromagnetically below TN=43K. Interestingly, its isostructural system with the same electronic valences of V ions, SrV10O15, exhibits no structural phase transition and magnetic long range order. Instead, it shows a spin-glass behavior below ~10K. We propose to perform TOF experiment on single crystals of SrV10O15 to find out why BaV10O15 and SrV10O15 show very different bulk properties even though they share the same electronic configurations.