Comment by zitterbewegung

I wouldn't have looked this up otherwise.

Maybe solar energy storage makes sense for storing the energy from fusion reactor stars, too.

There's also MOST: Molecular Solar Thermal Energy Storage, which stores solar energy as chemical energy for up to 18 years with a "specially designed molecule of carbon, hydrogen and nitrogen that changes shape when it comes into contact with sunlight."

"Chip-scale solar thermal electrical power generation" (2022) https://doi.org/10.1016/j.xcrp.2022.100789