That's not a comparison. Hydrogen goes Sun -> storage -> DC. Solar panels go Sun -> DC -> storage -> DC. You're comparing (Sun -> storage) against (DC -> storage -> DC). You need to include hydrogen fuel cell efficiency and solar panel efficiency for a (Sun -> .. storage .. -> DC) comparison.
100kwh of Solar energy generates 13.8kWh of Hydrogen, which is about 50% efficent thus generates 7kWh of DC
Going direct to DC is 23%, and the battery layer drops that to 20%, so 20kWh - about 3 times as efficient if you are using storage.
That's not bad, there are many applications where you'll take the extra land/solar take to provide the flexibility and density hydrogen can provide. Sure not for normal grid connected and static usage, but for mobile and temporary usage.
And that's not to mention all the other uses of hydrogen in industry that, without this method, would have to be generated by Sun->DC->Electrolysis
