Hydrogen is terrible for energy storage, and even worse for energy transport. Especially if you're doing electrolysis to split water that you then re-generate with atmospheric oxygen in order to produce electricity. A battery, flywheel, or just pumping water upstream gets you far better efficiency, and shipping literally any product of a hydrogen reaction is likely to be more efficient than shipping a heavy H2 tank back and forth.
Solar power in the EU seem to be increasing by 20% year-over-year. It's hard to see a situation where shipping hydrogen to supply thermal energy to an existing factory would be cheaper than just building a local electrolysis plant and the necessary solar panels. (Unless, of course, you're already invested or employed in selling hydrogen as a direct fossil fuel replacement.)