50% of current H2 is used for refining fossil fuels.
And, much like solar, it's not some random efficiency or capacity stat that matters, it's cost. Low cost electrolizers are the next big thing that will prompt Americans to ask "Why is China the world leader in this technology we've been ignoring or actively spreading lies about?"
Cost matters a lot more than efficiency. The two are related, but not the same. The correct question to ask is how much does a kWh of hydrogen cost, and how much lower can we get that.
Yes this is crazy, there is no point using Hydrogen right now.
Solar panels are getting so cheap so quickly that in sunny places electricity during the day will be virtually free. 50% efficiency is pretty good in that case.
Don't need to go that far, we could put giant solar panels that would soak up sunlight 24/7 and transmit that to earth. I see it work on small scale experiments, I really think that is SpaceX's ultimate game plan. Only those with capacity to deliver payloads at scale will be capable of building these energy stations.
How they would deal with objects, meteorites and repairing is another concern but I'd imagine it won't be a giant solar panel but modular ones that are floating in cluster
https://solaredition.com/wp-content/uploads/2020/12/2.png
96% of H2 produced from carbon sources.
How far do you think we can stretch electrolysis efficiency ? So far we are at 50% https://www.linkedin.com/pulse/actual-efficiency-electrolysi...
And you need to compress H2 even more to make it interesting to transport, making it even less efficient.
But lets follow our technical dreams where we will have 90% of H2 produced by solar panels (that doesn't have any impact on their own).