@bengy, thank you so much for featuring my post!

Earth's progress with power production reveals that, separately, renewable energy production is sometimes excessive and expensive. What you read is certainly conceivable.

For instance, some forms of hydroelectric power utilize the pumped-storage (aka gravity storage) where water is pumped to a separate reservoir as a backup means of hydropower during excess demand periods.

Combining this form of hydroelectric power with, for instance, solar power and you almost have a match made in heaven. Solar power plants with excess solar power can utilize the extra energy to pump water to a pump-storage hydro facility reservoir.

The problem, unfortunately, is that we can't get to a point like that without first testing out the technology individually. Too many moving parts in a new system may exceed our ability to manage it.

Thank you again @bengy