Hydrogen is even better for longer-term storage (e.g. seasonal). Produce hydrogen via electrolysis from solar in the summer, then power things when it's cloudy

Hydrogen is even better for longer-term storage (e.g. seasonal). Produce hydrogen via electrolysis from solar in the summer, then power things when it's cloudy + low sun angle in the winter. There are quite a few major hydrogen storage projects in progress that do exactly that, FWIW. E.g. https://www.energy.gov/lpo/advanced-clean-energy-storage https://www.energy.gov/lpo/advanced-clean-energy-storage (Disclaimer: My wife works on that project) Batteries don't compete for long term storage. Losses are too high. Hydrogen is an excellent solution for longer term (weeks to months to years) storage.