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Building ultra cheap energy storage for solar PV

Solar still needs storage cheap enough to move energy between seasons. I have been working on a startup to do this for the last two years.

One of those is a very inexpensive, reasonably efficient storage system that can hold a few months' worth of energy to flatten seasonal differences in solar production (a niche usually served by fuels). Typical steam process heat categories without access to affordable gas or coal require a few terawatts of solar to meet demand today and more in the future as the world becomes richer. Handling high seasonal solar variation, dealing with the last 10% of electricity generation in renewables-dominated grids without fossil fuels, and reducing the burden of energy costs in fuel-poor regions have been classified as near-impossible problems at various times.

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