Except...
you're forgetting a couple things. First, it also takes energy to compress the hydrogen to 5000 PSI and solar arrays are still pretty expensive. A 5-6 KW solar array will set you back somewhere around $10K. You'll have to factor in solar array degradation and equipment maintenance into the costs as well. Any legitimate analysis has to consider the life-cycle costs of buying, installing, and maintaining the equipment plus determine how long the equipment will last before it has to be replaced.