As　environmental　pollution　and　resource　depletion　intensify,　hydrogen　has　gained　importance　in　the　global　energy　transition　due　to　its　clean　and　low-carbon　characteristics.　This　paper　explores　the　optimal　configuration　of　hydrogen　production,　storage,　and　transportation　within　electric-hydrogen　energy　systems　(EHES),　focusing　on　optimizing　hydrogen　storage　and　electrolyzer　capacities.　First,　a　system　model　is　proposed,　focusing　on　the　capacities　of　hydrogen　storage　tanks　and　electrolyzers.　Next,　a　gaseous-solid　hydrogen　storage　system　(GSHSS)　is　integrated,　and　its　optimal　configuration　is　modeled.　Finally,　a　nonlinear　mixed-integer　programming　approach　is　introduced　to　optimize　hydrogen　transport,　considering　operational　costs,　investment,　and　system　constraints.　Case　studies　demonstrate　the　effectiveness　and　safety　of　the　proposed　model,　showing　that　optimization　can　enhance　system　efficiency,　reduce　costs,　and　improve　the　overall　sustainability　of　the　EHES.　©　2025　IEEE.