There are plenty of "battery" technologies that are not perfect, but substantially better than Hydrogen(in terms of round trip efficiency) though. Several startups with sound ideas. If only Governments picked them up in war like emergency and threw their capital at it to progress. 1. https://energydome.com 2. https://www.bbc.com/news/science-environment-61996520 3. https://newatlas.com/energy/china-100mw-compressed-air/ 4. https://www.hydrostor.ca